/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/unroll-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-15 13:10:51,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 13:10:51,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 13:10:51,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 13:10:51,926 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 [2022-02-15 13:10:51,941 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 13:10:51,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 13:10:51,941 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-15 13:10:51,942 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-15 13:10:51,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-15 13:10:51,942 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-15 13:10:51,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-15 13:10:51,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-15 13:10:51,943 INFO L138 SettingsManager]: * Use SBE=true [2022-02-15 13:10:51,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 13:10:51,943 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 13:10:51,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 13:10:51,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 13:10:51,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 13:10:51,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 13:10:51,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 13:10:51,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 13:10:51,944 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 13:10:51,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 13:10:51,944 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 13:10:51,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 13:10:51,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 13:10:51,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 13:10:51,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 13:10:51,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 13:10:51,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 13:10:51,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 13:10:51,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-15 13:10:51,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-15 13:10:51,945 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-15 13:10:51,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-15 13:10:51,945 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-15 13:10:51,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 13:10:51,945 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-15 13:10:52,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 13:10:52,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 13:10:52,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 13:10:52,122 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-15 13:10:52,123 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-15 13:10:52,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl [2022-02-15 13:10:52,124 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl' [2022-02-15 13:10:52,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 13:10:52,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 13:10:52,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-15 13:10:52,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-15 13:10:52,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-15 13:10:52,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:10:52" (1/1) ... [2022-02-15 13:10:52,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:10:52" (1/1) ... [2022-02-15 13:10:52,161 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-15 13:10:52,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-15 13:10:52,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 13:10:52,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 13:10:52,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 13:10:52,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:10:52" (1/1) ... [2022-02-15 13:10:52,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:10:52" (1/1) ... [2022-02-15 13:10:52,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:10:52" (1/1) ... [2022-02-15 13:10:52,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:10:52" (1/1) ... [2022-02-15 13:10:52,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:10:52" (1/1) ... [2022-02-15 13:10:52,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:10:52" (1/1) ... [2022-02-15 13:10:52,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:10:52" (1/1) ... [2022-02-15 13:10:52,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 13:10:52,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 13:10:52,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 13:10:52,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 13:10:52,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:10:52" (1/1) ... [2022-02-15 13:10:52,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 13:10:52,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:52,209 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) [2022-02-15 13:10:52,250 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 [2022-02-15 13:10:52,262 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-15 13:10:52,263 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-15 13:10:52,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-15 13:10:52,263 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-15 13:10:52,263 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-15 13:10:52,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-15 13:10:52,263 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-15 13:10:52,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 13:10:52,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 13:10:52,264 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-15 13:10:52,299 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 13:10:52,300 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 13:10:52,379 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 13:10:52,404 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 13:10:52,404 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-15 13:10:52,405 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-02-15 13:10:52,405 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-02-15 13:10:52,406 INFO L202 PluginConnector]: Adding new model unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:10:52 BoogieIcfgContainer [2022-02-15 13:10:52,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 13:10:52,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 13:10:52,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 13:10:52,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 13:10:52,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:10:52" (1/2) ... [2022-02-15 13:10:52,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e068ab0 and model type unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:10:52, skipping insertion in model container [2022-02-15 13:10:52,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:10:52" (2/2) ... [2022-02-15 13:10:52,411 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.bpl [2022-02-15 13:10:52,414 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-15 13:10:52,415 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-15 13:10:52,415 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 13:10:52,415 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-15 13:10:52,433 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-15 13:10:52,492 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 13:10:52,516 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 [2022-02-15 13:10:52,516 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-15 13:10:52,537 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2022-02-15 13:10:52,549 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:52,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-02-15 13:10:52,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:52,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:52,556 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:52,560 INFO L85 PathProgramCache]: Analyzing trace with hash 842249075, now seen corresponding path program 1 times [2022-02-15 13:10:52,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:52,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115082617] [2022-02-15 13:10:52,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:52,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:52,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:52,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115082617] [2022-02-15 13:10:52,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115082617] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:10:52,682 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:10:52,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-15 13:10:52,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577976962] [2022-02-15 13:10:52,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:10:52,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 13:10:52,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:52,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 13:10:52,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 13:10:52,708 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:52,741 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2022-02-15 13:10:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 13:10:52,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-02-15 13:10:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:52,749 INFO L225 Difference]: With dead ends: 22 [2022-02-15 13:10:52,749 INFO L226 Difference]: Without dead ends: 19 [2022-02-15 13:10:52,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 13:10:52,752 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:52,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:10:52,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-02-15 13:10:52,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-02-15 13:10:52,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:52,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2022-02-15 13:10:52,802 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2022-02-15 13:10:52,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:52,802 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2022-02-15 13:10:52,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:52,802 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2022-02-15 13:10:52,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-15 13:10:52,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:52,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:52,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 13:10:52,803 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:52,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:52,804 INFO L85 PathProgramCache]: Analyzing trace with hash 340649728, now seen corresponding path program 1 times [2022-02-15 13:10:52,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:52,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697596724] [2022-02-15 13:10:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:52,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:52,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:52,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697596724] [2022-02-15 13:10:52,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697596724] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:10:52,842 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:10:52,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 13:10:52,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516807445] [2022-02-15 13:10:52,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:10:52,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 13:10:52,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:52,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 13:10:52,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 13:10:52,844 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:52,894 INFO L93 Difference]: Finished difference Result 19 states and 30 transitions. [2022-02-15 13:10:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:10:52,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-02-15 13:10:52,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:52,895 INFO L225 Difference]: With dead ends: 19 [2022-02-15 13:10:52,895 INFO L226 Difference]: Without dead ends: 15 [2022-02-15 13:10:52,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:10:52,896 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:52,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 5 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:10:52,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-02-15 13:10:52,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-02-15 13:10:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 25 transitions. [2022-02-15 13:10:52,899 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 25 transitions. Word has length 10 [2022-02-15 13:10:52,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:52,899 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 25 transitions. [2022-02-15 13:10:52,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 25 transitions. [2022-02-15 13:10:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-15 13:10:52,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:52,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:52,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 13:10:52,900 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:52,901 INFO L85 PathProgramCache]: Analyzing trace with hash 141890046, now seen corresponding path program 1 times [2022-02-15 13:10:52,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:52,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635717913] [2022-02-15 13:10:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:52,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:52,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:52,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635717913] [2022-02-15 13:10:52,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635717913] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:52,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88105185] [2022-02-15 13:10:52,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:52,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:52,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:52,933 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) [2022-02-15 13:10:52,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-15 13:10:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:52,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-15 13:10:52,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:53,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:53,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88105185] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:53,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:53,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-02-15 13:10:53,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570292398] [2022-02-15 13:10:53,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:53,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:10:53,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:53,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:10:53,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:10:53,045 INFO L87 Difference]: Start difference. First operand 15 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) 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) [2022-02-15 13:10:53,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:53,082 INFO L93 Difference]: Finished difference Result 18 states and 31 transitions. [2022-02-15 13:10:53,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 13:10:53,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) 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 10 [2022-02-15 13:10:53,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:53,084 INFO L225 Difference]: With dead ends: 18 [2022-02-15 13:10:53,084 INFO L226 Difference]: Without dead ends: 18 [2022-02-15 13:10:53,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:10:53,088 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:53,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:10:53,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-15 13:10:53,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-02-15 13:10:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:53,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2022-02-15 13:10:53,097 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2022-02-15 13:10:53,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:53,098 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2022-02-15 13:10:53,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) 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) [2022-02-15 13:10:53,098 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2022-02-15 13:10:53,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-15 13:10:53,099 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:53,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:53,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-15 13:10:53,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:53,306 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:53,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:53,307 INFO L85 PathProgramCache]: Analyzing trace with hash 175957154, now seen corresponding path program 2 times [2022-02-15 13:10:53,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:53,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647251193] [2022-02-15 13:10:53,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:53,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:53,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:53,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647251193] [2022-02-15 13:10:53,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647251193] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:10:53,369 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:10:53,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 13:10:53,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642288963] [2022-02-15 13:10:53,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:10:53,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 13:10:53,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:53,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 13:10:53,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 13:10:53,375 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:53,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:53,398 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2022-02-15 13:10:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 13:10:53,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-02-15 13:10:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:53,399 INFO L225 Difference]: With dead ends: 20 [2022-02-15 13:10:53,399 INFO L226 Difference]: Without dead ends: 20 [2022-02-15 13:10:53,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 13:10:53,403 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:53,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:10:53,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-15 13:10:53,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-15 13:10:53,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2022-02-15 13:10:53,410 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2022-02-15 13:10:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:53,411 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2022-02-15 13:10:53,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:53,411 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2022-02-15 13:10:53,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-15 13:10:53,412 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:53,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:53,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 13:10:53,412 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:53,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:53,414 INFO L85 PathProgramCache]: Analyzing trace with hash 104356309, now seen corresponding path program 1 times [2022-02-15 13:10:53,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:53,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468801853] [2022-02-15 13:10:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:53,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:53,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:53,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468801853] [2022-02-15 13:10:53,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468801853] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:53,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698422424] [2022-02-15 13:10:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:53,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:53,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:53,453 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) [2022-02-15 13:10:53,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-15 13:10:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:53,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 13:10:53,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:53,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:53,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698422424] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:53,572 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:53,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-02-15 13:10:53,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523729531] [2022-02-15 13:10:53,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:53,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:10:53,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:53,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:10:53,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:10:53,574 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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) [2022-02-15 13:10:53,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:53,615 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2022-02-15 13:10:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:10:53,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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 11 [2022-02-15 13:10:53,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:53,616 INFO L225 Difference]: With dead ends: 28 [2022-02-15 13:10:53,616 INFO L226 Difference]: Without dead ends: 28 [2022-02-15 13:10:53,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:10:53,620 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:53,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 11 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:10:53,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-15 13:10:53,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-02-15 13:10:53,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:53,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2022-02-15 13:10:53,629 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 11 [2022-02-15 13:10:53,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:53,629 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2022-02-15 13:10:53,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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) [2022-02-15 13:10:53,629 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2022-02-15 13:10:53,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-15 13:10:53,629 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:53,630 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:53,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:53,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:53,830 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:53,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:53,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1924485941, now seen corresponding path program 2 times [2022-02-15 13:10:53,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:53,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109906744] [2022-02-15 13:10:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:53,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:53,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:53,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109906744] [2022-02-15 13:10:53,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109906744] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:53,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660628671] [2022-02-15 13:10:53,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:10:53,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:53,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:53,915 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) [2022-02-15 13:10:53,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-15 13:10:53,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:10:53,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:53,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:10:53,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:53,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:54,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660628671] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:54,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:54,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-02-15 13:10:54,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716023023] [2022-02-15 13:10:54,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:54,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:10:54,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:54,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:10:54,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:10:54,036 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:54,080 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2022-02-15 13:10:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 13:10:54,080 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-15 13:10:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:54,081 INFO L225 Difference]: With dead ends: 32 [2022-02-15 13:10:54,081 INFO L226 Difference]: Without dead ends: 32 [2022-02-15 13:10:54,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:10:54,081 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:54,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:10:54,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-15 13:10:54,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-15 13:10:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2022-02-15 13:10:54,084 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2022-02-15 13:10:54,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:54,085 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2022-02-15 13:10:54,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:54,085 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2022-02-15 13:10:54,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:10:54,085 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:54,085 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:54,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:54,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:54,307 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:54,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:54,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1958638656, now seen corresponding path program 3 times [2022-02-15 13:10:54,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:54,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812004249] [2022-02-15 13:10:54,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:54,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:54,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:54,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812004249] [2022-02-15 13:10:54,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812004249] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:54,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220208792] [2022-02-15 13:10:54,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:10:54,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:54,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:54,364 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) [2022-02-15 13:10:54,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-15 13:10:54,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:10:54,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:54,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:10:54,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:54,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:10:54,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-02-15 13:10:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:54,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:54,839 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-15 13:10:54,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-15 13:11:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:02,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220208792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:02,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:02,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-02-15 13:11:02,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694903726] [2022-02-15 13:11:02,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:02,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:11:02,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:02,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:11:02,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:11:02,177 INFO L87 Difference]: Start difference. First operand 32 states and 59 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:02,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:02,305 INFO L93 Difference]: Finished difference Result 80 states and 142 transitions. [2022-02-15 13:11:02,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:11:02,305 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:02,308 INFO L225 Difference]: With dead ends: 80 [2022-02-15 13:11:02,308 INFO L226 Difference]: Without dead ends: 77 [2022-02-15 13:11:02,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:11:02,309 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 51 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:02,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 40 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-15 13:11:02,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 44. [2022-02-15 13:11:02,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.186046511627907) internal successors, (94), 43 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:02,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 94 transitions. [2022-02-15 13:11:02,326 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 94 transitions. Word has length 14 [2022-02-15 13:11:02,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:02,326 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 94 transitions. [2022-02-15 13:11:02,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:02,326 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 94 transitions. [2022-02-15 13:11:02,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:11:02,326 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:02,327 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:02,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:02,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:02,536 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:02,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:02,536 INFO L85 PathProgramCache]: Analyzing trace with hash -617160214, now seen corresponding path program 4 times [2022-02-15 13:11:02,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:02,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967538411] [2022-02-15 13:11:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:02,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:02,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:02,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967538411] [2022-02-15 13:11:02,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967538411] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:02,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747765013] [2022-02-15 13:11:02,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:11:02,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:02,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:02,579 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) [2022-02-15 13:11:02,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-15 13:11:02,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:11:02,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:02,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:11:02,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:02,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:11:02,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-02-15 13:11:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:02,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:02,982 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-15 13:11:02,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-15 13:11:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:07,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747765013] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:07,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:07,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-02-15 13:11:07,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251503053] [2022-02-15 13:11:07,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:07,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:11:07,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:07,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:11:07,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:11:07,877 INFO L87 Difference]: Start difference. First operand 44 states and 94 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:07,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:07,997 INFO L93 Difference]: Finished difference Result 89 states and 171 transitions. [2022-02-15 13:11:07,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:11:07,997 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:07,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:07,998 INFO L225 Difference]: With dead ends: 89 [2022-02-15 13:11:07,998 INFO L226 Difference]: Without dead ends: 86 [2022-02-15 13:11:07,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:11:07,998 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:07,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 41 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:07,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-15 13:11:08,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2022-02-15 13:11:08,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.38) internal successors, (119), 50 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:08,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 119 transitions. [2022-02-15 13:11:08,002 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 119 transitions. Word has length 14 [2022-02-15 13:11:08,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:08,002 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 119 transitions. [2022-02-15 13:11:08,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:08,002 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 119 transitions. [2022-02-15 13:11:08,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:11:08,003 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:08,003 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:08,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-15 13:11:08,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:08,215 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:08,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:08,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1947955938, now seen corresponding path program 5 times [2022-02-15 13:11:08,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:08,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50139100] [2022-02-15 13:11:08,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:08,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:08,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:08,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50139100] [2022-02-15 13:11:08,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50139100] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:08,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139351966] [2022-02-15 13:11:08,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:11:08,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:08,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:08,263 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) [2022-02-15 13:11:08,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-15 13:11:08,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:11:08,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:08,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:11:08,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:08,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:11:08,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-02-15 13:11:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:08,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:08,584 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-15 13:11:08,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-15 13:11:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:10,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139351966] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:10,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:10,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2022-02-15 13:11:10,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117644075] [2022-02-15 13:11:10,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:10,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:10,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:10,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:10,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:10,071 INFO L87 Difference]: Start difference. First operand 51 states and 119 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:10,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:10,187 INFO L93 Difference]: Finished difference Result 98 states and 200 transitions. [2022-02-15 13:11:10,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:11:10,188 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:10,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:10,188 INFO L225 Difference]: With dead ends: 98 [2022-02-15 13:11:10,188 INFO L226 Difference]: Without dead ends: 95 [2022-02-15 13:11:10,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:10,189 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:10,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 41 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:10,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-02-15 13:11:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2022-02-15 13:11:10,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.5344827586206895) internal successors, (147), 58 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:10,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2022-02-15 13:11:10,192 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 14 [2022-02-15 13:11:10,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:10,192 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2022-02-15 13:11:10,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2022-02-15 13:11:10,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:11:10,193 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:10,193 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:10,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:10,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:10,409 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:10,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:10,410 INFO L85 PathProgramCache]: Analyzing trace with hash -137821974, now seen corresponding path program 6 times [2022-02-15 13:11:10,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:10,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225205175] [2022-02-15 13:11:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:10,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:10,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:10,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225205175] [2022-02-15 13:11:10,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225205175] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:10,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132352690] [2022-02-15 13:11:10,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:11:10,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:10,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:10,443 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) [2022-02-15 13:11:10,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-15 13:11:10,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:11:10,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:10,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:11:10,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:10,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:11:10,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-02-15 13:11:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:10,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:10,715 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-15 13:11:10,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-15 13:11:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:14,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132352690] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:14,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:14,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 12 [2022-02-15 13:11:14,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732698042] [2022-02-15 13:11:14,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:14,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:11:14,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:14,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:11:14,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:11:14,067 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:14,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:14,205 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2022-02-15 13:11:14,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:11:14,205 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:14,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:14,206 INFO L225 Difference]: With dead ends: 108 [2022-02-15 13:11:14,206 INFO L226 Difference]: Without dead ends: 105 [2022-02-15 13:11:14,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:11:14,206 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:14,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 48 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:14,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-02-15 13:11:14,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2022-02-15 13:11:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.656716417910448) internal successors, (178), 67 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 178 transitions. [2022-02-15 13:11:14,210 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 178 transitions. Word has length 14 [2022-02-15 13:11:14,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:14,210 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 178 transitions. [2022-02-15 13:11:14,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:14,210 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 178 transitions. [2022-02-15 13:11:14,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:11:14,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:14,211 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:14,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:14,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:14,424 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:14,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:14,424 INFO L85 PathProgramCache]: Analyzing trace with hash -372427806, now seen corresponding path program 7 times [2022-02-15 13:11:14,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:14,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129444496] [2022-02-15 13:11:14,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:14,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:14,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:14,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:14,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129444496] [2022-02-15 13:11:14,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129444496] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:14,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848769330] [2022-02-15 13:11:14,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:11:14,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:14,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:14,469 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) [2022-02-15 13:11:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:14,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:11:14,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:14,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-15 13:11:14,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:11:14,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-02-15 13:11:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:14,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:14,763 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-15 13:11:14,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-15 13:11:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:18,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848769330] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:18,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:18,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 11 [2022-02-15 13:11:18,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361622243] [2022-02-15 13:11:18,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:18,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:11:18,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:18,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:11:18,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:11:18,486 INFO L87 Difference]: Start difference. First operand 68 states and 178 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:18,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:18,565 INFO L93 Difference]: Finished difference Result 119 states and 267 transitions. [2022-02-15 13:11:18,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:11:18,565 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-15 13:11:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:18,566 INFO L225 Difference]: With dead ends: 119 [2022-02-15 13:11:18,567 INFO L226 Difference]: Without dead ends: 116 [2022-02-15 13:11:18,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:11:18,572 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:18,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 36 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-15 13:11:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2022-02-15 13:11:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.730769230769231) internal successors, (213), 78 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 213 transitions. [2022-02-15 13:11:18,590 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 213 transitions. Word has length 14 [2022-02-15 13:11:18,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:18,590 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 213 transitions. [2022-02-15 13:11:18,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:18,590 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 213 transitions. [2022-02-15 13:11:18,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:18,608 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:18,608 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:18,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-15 13:11:18,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-15 13:11:18,824 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:18,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:18,824 INFO L85 PathProgramCache]: Analyzing trace with hash 588988371, now seen corresponding path program 8 times [2022-02-15 13:11:18,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:18,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473222845] [2022-02-15 13:11:18,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:18,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:18,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:18,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473222845] [2022-02-15 13:11:18,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473222845] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:18,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004165706] [2022-02-15 13:11:18,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:11:18,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:18,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:18,871 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) [2022-02-15 13:11:18,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-15 13:11:18,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:11:18,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:18,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:18,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:18,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:19,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004165706] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:19,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:19,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-15 13:11:19,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745875015] [2022-02-15 13:11:19,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:19,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:11:19,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:19,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:11:19,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:11:19,020 INFO L87 Difference]: Start difference. First operand 79 states and 213 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:19,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:19,164 INFO L93 Difference]: Finished difference Result 156 states and 339 transitions. [2022-02-15 13:11:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:11:19,164 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:19,165 INFO L225 Difference]: With dead ends: 156 [2022-02-15 13:11:19,165 INFO L226 Difference]: Without dead ends: 151 [2022-02-15 13:11:19,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:11:19,165 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 85 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:19,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 31 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:19,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-02-15 13:11:19,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 91. [2022-02-15 13:11:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.7777777777777777) internal successors, (250), 90 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 250 transitions. [2022-02-15 13:11:19,169 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 250 transitions. Word has length 15 [2022-02-15 13:11:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:19,169 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 250 transitions. [2022-02-15 13:11:19,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 250 transitions. [2022-02-15 13:11:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:19,170 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:19,170 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:19,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:19,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:19,379 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:19,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:19,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1277594475, now seen corresponding path program 9 times [2022-02-15 13:11:19,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:19,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878202365] [2022-02-15 13:11:19,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:19,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:19,428 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:19,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878202365] [2022-02-15 13:11:19,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878202365] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:19,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128532317] [2022-02-15 13:11:19,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:11:19,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:19,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:19,437 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) [2022-02-15 13:11:19,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:11:19,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:19,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:19,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:19,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-15 13:11:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:19,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:19,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128532317] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:19,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:19,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-15 13:11:19,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305745970] [2022-02-15 13:11:19,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:19,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:11:19,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:19,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:11:19,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:11:19,586 INFO L87 Difference]: Start difference. First operand 91 states and 250 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:19,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:19,724 INFO L93 Difference]: Finished difference Result 166 states and 350 transitions. [2022-02-15 13:11:19,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:11:19,725 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:19,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:19,725 INFO L225 Difference]: With dead ends: 166 [2022-02-15 13:11:19,725 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 13:11:19,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:11:19,726 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:19,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 53 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:19,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 13:11:19,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 98. [2022-02-15 13:11:19,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.731958762886598) internal successors, (265), 97 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 265 transitions. [2022-02-15 13:11:19,729 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 265 transitions. Word has length 15 [2022-02-15 13:11:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:19,729 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 265 transitions. [2022-02-15 13:11:19,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 265 transitions. [2022-02-15 13:11:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:19,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:19,730 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:19,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:19,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-15 13:11:19,943 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:19,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:19,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1350497361, now seen corresponding path program 10 times [2022-02-15 13:11:19,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:19,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276683461] [2022-02-15 13:11:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:19,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:19,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:19,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276683461] [2022-02-15 13:11:19,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276683461] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:19,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954465514] [2022-02-15 13:11:19,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:11:19,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:19,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:19,984 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) [2022-02-15 13:11:19,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-15 13:11:20,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:11:20,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:20,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:20,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:20,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:20,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954465514] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:20,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:20,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:20,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171735158] [2022-02-15 13:11:20,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:20,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:20,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:20,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:20,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:20,149 INFO L87 Difference]: Start difference. First operand 98 states and 265 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:20,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:20,255 INFO L93 Difference]: Finished difference Result 130 states and 308 transitions. [2022-02-15 13:11:20,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:11:20,255 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:20,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:20,256 INFO L225 Difference]: With dead ends: 130 [2022-02-15 13:11:20,256 INFO L226 Difference]: Without dead ends: 129 [2022-02-15 13:11:20,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:11:20,257 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:20,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 23 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:20,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-02-15 13:11:20,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 99. [2022-02-15 13:11:20,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:20,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2022-02-15 13:11:20,259 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2022-02-15 13:11:20,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:20,259 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2022-02-15 13:11:20,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2022-02-15 13:11:20,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:20,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:20,260 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:20,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:20,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-15 13:11:20,461 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:20,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:20,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2078385983, now seen corresponding path program 11 times [2022-02-15 13:11:20,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:20,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448125275] [2022-02-15 13:11:20,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:20,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:20,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:20,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448125275] [2022-02-15 13:11:20,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448125275] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:20,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231159915] [2022-02-15 13:11:20,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:11:20,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:20,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:20,520 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) [2022-02-15 13:11:20,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-15 13:11:20,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:11:20,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:20,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:20,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:20,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:20,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231159915] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:20,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:20,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:20,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704220923] [2022-02-15 13:11:20,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:20,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:20,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:20,666 INFO L87 Difference]: Start difference. First operand 99 states and 265 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:20,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:20,725 INFO L93 Difference]: Finished difference Result 166 states and 358 transitions. [2022-02-15 13:11:20,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:11:20,725 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:20,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:20,726 INFO L225 Difference]: With dead ends: 166 [2022-02-15 13:11:20,726 INFO L226 Difference]: Without dead ends: 166 [2022-02-15 13:11:20,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:11:20,726 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 69 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:20,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 25 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:20,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-02-15 13:11:20,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 99. [2022-02-15 13:11:20,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:20,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2022-02-15 13:11:20,730 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2022-02-15 13:11:20,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:20,730 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2022-02-15 13:11:20,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:20,730 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2022-02-15 13:11:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:20,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:20,730 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:20,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:20,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-15 13:11:20,939 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:20,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:20,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1951365271, now seen corresponding path program 12 times [2022-02-15 13:11:20,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:20,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368847201] [2022-02-15 13:11:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:20,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:20,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:20,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368847201] [2022-02-15 13:11:20,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368847201] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:20,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671700335] [2022-02-15 13:11:20,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:11:20,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:20,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:21,002 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) [2022-02-15 13:11:21,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-15 13:11:21,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:11:21,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:21,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:21,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:21,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:21,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671700335] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:21,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:21,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:21,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701123491] [2022-02-15 13:11:21,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:21,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:21,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:21,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:21,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:21,131 INFO L87 Difference]: Start difference. First operand 99 states and 265 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:21,423 INFO L93 Difference]: Finished difference Result 286 states and 534 transitions. [2022-02-15 13:11:21,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:11:21,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:21,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:21,424 INFO L225 Difference]: With dead ends: 286 [2022-02-15 13:11:21,424 INFO L226 Difference]: Without dead ends: 282 [2022-02-15 13:11:21,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=508, Invalid=974, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:11:21,426 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 179 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:21,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 41 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:21,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-02-15 13:11:21,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 99. [2022-02-15 13:11:21,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.683673469387755) internal successors, (263), 98 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 263 transitions. [2022-02-15 13:11:21,432 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 263 transitions. Word has length 15 [2022-02-15 13:11:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:21,432 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 263 transitions. [2022-02-15 13:11:21,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:21,432 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 263 transitions. [2022-02-15 13:11:21,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:21,433 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:21,433 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:21,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:21,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-15 13:11:21,647 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:21,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:21,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1288277193, now seen corresponding path program 13 times [2022-02-15 13:11:21,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:21,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709188176] [2022-02-15 13:11:21,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:21,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:21,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:21,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709188176] [2022-02-15 13:11:21,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709188176] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:21,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944311102] [2022-02-15 13:11:21,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:11:21,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:21,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:21,698 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) [2022-02-15 13:11:21,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-15 13:11:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:21,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:21,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:21,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:21,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944311102] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:21,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:21,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:21,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836516545] [2022-02-15 13:11:21,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:21,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:21,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:21,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:21,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:21,840 INFO L87 Difference]: Start difference. First operand 99 states and 263 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:21,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:21,944 INFO L93 Difference]: Finished difference Result 176 states and 372 transitions. [2022-02-15 13:11:21,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:11:21,944 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:21,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:21,945 INFO L225 Difference]: With dead ends: 176 [2022-02-15 13:11:21,945 INFO L226 Difference]: Without dead ends: 176 [2022-02-15 13:11:21,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:11:21,946 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:21,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 51 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:21,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-15 13:11:21,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 104. [2022-02-15 13:11:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.6893203883495147) internal successors, (277), 103 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:21,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 277 transitions. [2022-02-15 13:11:21,950 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 277 transitions. Word has length 15 [2022-02-15 13:11:21,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:21,950 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 277 transitions. [2022-02-15 13:11:21,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:21,950 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 277 transitions. [2022-02-15 13:11:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:21,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:21,950 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:21,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-02-15 13:11:22,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:22,155 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:22,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:22,156 INFO L85 PathProgramCache]: Analyzing trace with hash -379353783, now seen corresponding path program 14 times [2022-02-15 13:11:22,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:22,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046854398] [2022-02-15 13:11:22,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:22,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:22,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:22,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046854398] [2022-02-15 13:11:22,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046854398] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:22,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600418860] [2022-02-15 13:11:22,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:11:22,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:22,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:22,216 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) [2022-02-15 13:11:22,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-15 13:11:22,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:11:22,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:22,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:22,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:22,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:22,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600418860] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:22,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:22,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:22,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546899418] [2022-02-15 13:11:22,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:22,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:22,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:22,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:22,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:22,361 INFO L87 Difference]: Start difference. First operand 104 states and 277 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:22,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:22,475 INFO L93 Difference]: Finished difference Result 179 states and 373 transitions. [2022-02-15 13:11:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:11:22,476 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:22,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:22,477 INFO L225 Difference]: With dead ends: 179 [2022-02-15 13:11:22,477 INFO L226 Difference]: Without dead ends: 178 [2022-02-15 13:11:22,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:11:22,477 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 89 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:22,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 39 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:22,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-02-15 13:11:22,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 104. [2022-02-15 13:11:22,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.679611650485437) internal successors, (276), 103 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 276 transitions. [2022-02-15 13:11:22,480 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 276 transitions. Word has length 15 [2022-02-15 13:11:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:22,480 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 276 transitions. [2022-02-15 13:11:22,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:22,480 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 276 transitions. [2022-02-15 13:11:22,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:22,481 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:22,481 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:22,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:22,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-15 13:11:22,681 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:22,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:22,682 INFO L85 PathProgramCache]: Analyzing trace with hash 486730169, now seen corresponding path program 15 times [2022-02-15 13:11:22,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:22,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318934740] [2022-02-15 13:11:22,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:22,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:22,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:22,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318934740] [2022-02-15 13:11:22,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318934740] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:22,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833167026] [2022-02-15 13:11:22,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:11:22,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:22,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:22,731 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) [2022-02-15 13:11:22,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-15 13:11:22,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:11:22,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:22,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:22,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:22,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:22,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833167026] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:22,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:22,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:22,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478498432] [2022-02-15 13:11:22,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:22,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:22,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:22,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:22,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:22,885 INFO L87 Difference]: Start difference. First operand 104 states and 276 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:23,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:23,056 INFO L93 Difference]: Finished difference Result 279 states and 534 transitions. [2022-02-15 13:11:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:11:23,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:23,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:23,057 INFO L225 Difference]: With dead ends: 279 [2022-02-15 13:11:23,057 INFO L226 Difference]: Without dead ends: 279 [2022-02-15 13:11:23,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=230, Invalid=322, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:11:23,058 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 154 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:23,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 57 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:23,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-02-15 13:11:23,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 104. [2022-02-15 13:11:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.679611650485437) internal successors, (276), 103 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 276 transitions. [2022-02-15 13:11:23,061 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 276 transitions. Word has length 15 [2022-02-15 13:11:23,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:23,062 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 276 transitions. [2022-02-15 13:11:23,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 276 transitions. [2022-02-15 13:11:23,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:23,064 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:23,064 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:23,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:23,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:23,280 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:23,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:23,280 INFO L85 PathProgramCache]: Analyzing trace with hash 475952871, now seen corresponding path program 16 times [2022-02-15 13:11:23,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:23,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824537185] [2022-02-15 13:11:23,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:23,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:23,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:23,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824537185] [2022-02-15 13:11:23,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824537185] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:23,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015644738] [2022-02-15 13:11:23,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:11:23,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:23,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:23,323 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) [2022-02-15 13:11:23,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-15 13:11:23,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:11:23,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:23,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:23,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:23,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:23,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015644738] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:23,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:23,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-15 13:11:23,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980335061] [2022-02-15 13:11:23,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:23,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:11:23,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:23,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:11:23,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:11:23,434 INFO L87 Difference]: Start difference. First operand 104 states and 276 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:23,573 INFO L93 Difference]: Finished difference Result 160 states and 352 transitions. [2022-02-15 13:11:23,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:11:23,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:23,574 INFO L225 Difference]: With dead ends: 160 [2022-02-15 13:11:23,574 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 13:11:23,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:11:23,574 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:23,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 49 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 13:11:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 105. [2022-02-15 13:11:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6634615384615383) internal successors, (277), 104 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:23,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 277 transitions. [2022-02-15 13:11:23,577 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 277 transitions. Word has length 15 [2022-02-15 13:11:23,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:23,577 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 277 transitions. [2022-02-15 13:11:23,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:23,577 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 277 transitions. [2022-02-15 13:11:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:23,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:23,578 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:23,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:23,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:23,778 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:23,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:23,778 INFO L85 PathProgramCache]: Analyzing trace with hash -2097623819, now seen corresponding path program 17 times [2022-02-15 13:11:23,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:23,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661208050] [2022-02-15 13:11:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:23,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:23,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:23,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661208050] [2022-02-15 13:11:23,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661208050] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:23,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6002527] [2022-02-15 13:11:23,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:11:23,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:23,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:23,823 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) [2022-02-15 13:11:23,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-15 13:11:23,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:11:23,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:23,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:23,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:23,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:23,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6002527] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:23,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:23,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-15 13:11:23,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775125025] [2022-02-15 13:11:23,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:23,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:11:23,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:23,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:11:23,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:11:23,975 INFO L87 Difference]: Start difference. First operand 105 states and 277 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:24,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:24,173 INFO L93 Difference]: Finished difference Result 293 states and 557 transitions. [2022-02-15 13:11:24,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:11:24,174 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:24,175 INFO L225 Difference]: With dead ends: 293 [2022-02-15 13:11:24,175 INFO L226 Difference]: Without dead ends: 293 [2022-02-15 13:11:24,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=427, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:11:24,175 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 167 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:24,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 41 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:24,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-02-15 13:11:24,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 105. [2022-02-15 13:11:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6634615384615383) internal successors, (277), 104 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 277 transitions. [2022-02-15 13:11:24,193 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 277 transitions. Word has length 15 [2022-02-15 13:11:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:24,193 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 277 transitions. [2022-02-15 13:11:24,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:24,193 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 277 transitions. [2022-02-15 13:11:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:24,194 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:24,194 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:24,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:24,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:24,395 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:24,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:24,396 INFO L85 PathProgramCache]: Analyzing trace with hash 257824113, now seen corresponding path program 18 times [2022-02-15 13:11:24,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:24,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285115061] [2022-02-15 13:11:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:24,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:24,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:24,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285115061] [2022-02-15 13:11:24,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285115061] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:24,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222904942] [2022-02-15 13:11:24,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:11:24,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:24,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:24,443 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) [2022-02-15 13:11:24,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-15 13:11:24,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:11:24,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:24,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:24,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:24,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:24,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222904942] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:24,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:24,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:24,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566113953] [2022-02-15 13:11:24,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:24,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:24,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:24,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:24,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:24,592 INFO L87 Difference]: Start difference. First operand 105 states and 277 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:25,084 INFO L93 Difference]: Finished difference Result 298 states and 545 transitions. [2022-02-15 13:11:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:11:25,085 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:25,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:25,086 INFO L225 Difference]: With dead ends: 298 [2022-02-15 13:11:25,086 INFO L226 Difference]: Without dead ends: 292 [2022-02-15 13:11:25,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=502, Invalid=980, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:11:25,086 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 200 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:25,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 37 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:25,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-15 13:11:25,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 105. [2022-02-15 13:11:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6346153846153846) internal successors, (274), 104 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 274 transitions. [2022-02-15 13:11:25,090 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 274 transitions. Word has length 15 [2022-02-15 13:11:25,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:25,090 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 274 transitions. [2022-02-15 13:11:25,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:25,090 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 274 transitions. [2022-02-15 13:11:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:25,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:25,090 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:25,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:25,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:25,291 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:25,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:25,292 INFO L85 PathProgramCache]: Analyzing trace with hash 920912191, now seen corresponding path program 19 times [2022-02-15 13:11:25,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:25,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522469372] [2022-02-15 13:11:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:25,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:25,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:25,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522469372] [2022-02-15 13:11:25,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522469372] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:25,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394487406] [2022-02-15 13:11:25,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:11:25,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:25,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:25,344 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) [2022-02-15 13:11:25,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-15 13:11:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:25,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:25,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:25,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:25,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394487406] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:25,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:25,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:25,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823495515] [2022-02-15 13:11:25,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:25,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:25,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:25,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:25,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:25,482 INFO L87 Difference]: Start difference. First operand 105 states and 274 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:25,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:25,560 INFO L93 Difference]: Finished difference Result 185 states and 391 transitions. [2022-02-15 13:11:25,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:11:25,560 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:25,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:25,561 INFO L225 Difference]: With dead ends: 185 [2022-02-15 13:11:25,561 INFO L226 Difference]: Without dead ends: 185 [2022-02-15 13:11:25,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:11:25,562 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 89 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:25,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 41 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:25,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-15 13:11:25,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 110. [2022-02-15 13:11:25,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.6605504587155964) internal successors, (290), 109 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:25,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 290 transitions. [2022-02-15 13:11:25,565 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 290 transitions. Word has length 15 [2022-02-15 13:11:25,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:25,565 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 290 transitions. [2022-02-15 13:11:25,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:25,565 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 290 transitions. [2022-02-15 13:11:25,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:25,565 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:25,565 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:25,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:25,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-02-15 13:11:25,775 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:25,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:25,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1829835601, now seen corresponding path program 20 times [2022-02-15 13:11:25,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:25,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2364088] [2022-02-15 13:11:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:25,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:25,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:25,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2364088] [2022-02-15 13:11:25,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2364088] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:25,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482869323] [2022-02-15 13:11:25,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:11:25,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:25,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:25,815 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) [2022-02-15 13:11:25,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-15 13:11:25,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:11:25,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:25,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:25,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:25,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:25,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482869323] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:25,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:25,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:25,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792344555] [2022-02-15 13:11:25,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:25,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:25,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:25,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:25,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:25,945 INFO L87 Difference]: Start difference. First operand 110 states and 290 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:26,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:26,075 INFO L93 Difference]: Finished difference Result 190 states and 395 transitions. [2022-02-15 13:11:26,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:11:26,075 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:26,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:26,076 INFO L225 Difference]: With dead ends: 190 [2022-02-15 13:11:26,076 INFO L226 Difference]: Without dead ends: 189 [2022-02-15 13:11:26,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:11:26,077 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:26,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 43 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:26,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-15 13:11:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 110. [2022-02-15 13:11:26,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.6513761467889907) internal successors, (289), 109 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:26,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 289 transitions. [2022-02-15 13:11:26,080 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 289 transitions. Word has length 15 [2022-02-15 13:11:26,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:26,080 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 289 transitions. [2022-02-15 13:11:26,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:26,080 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 289 transitions. [2022-02-15 13:11:26,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:26,080 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:26,081 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:26,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:26,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-02-15 13:11:26,298 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:26,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:26,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1599047743, now seen corresponding path program 21 times [2022-02-15 13:11:26,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:26,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869376553] [2022-02-15 13:11:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:26,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:26,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:26,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869376553] [2022-02-15 13:11:26,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869376553] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:26,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708068876] [2022-02-15 13:11:26,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:11:26,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:26,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:26,335 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) [2022-02-15 13:11:26,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-15 13:11:26,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:11:26,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:26,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:26,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:26,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:26,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708068876] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:26,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:26,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:26,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674087890] [2022-02-15 13:11:26,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:26,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:26,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:26,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:26,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:26,478 INFO L87 Difference]: Start difference. First operand 110 states and 289 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:26,683 INFO L93 Difference]: Finished difference Result 275 states and 525 transitions. [2022-02-15 13:11:26,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:11:26,683 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:26,684 INFO L225 Difference]: With dead ends: 275 [2022-02-15 13:11:26,684 INFO L226 Difference]: Without dead ends: 275 [2022-02-15 13:11:26,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=223, Invalid=329, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:11:26,686 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 169 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:26,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 49 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-02-15 13:11:26,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 110. [2022-02-15 13:11:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.6513761467889907) internal successors, (289), 109 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 289 transitions. [2022-02-15 13:11:26,690 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 289 transitions. Word has length 15 [2022-02-15 13:11:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:26,690 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 289 transitions. [2022-02-15 13:11:26,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 289 transitions. [2022-02-15 13:11:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:26,691 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:26,691 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:26,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:26,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:26,906 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:26,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:26,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1609825041, now seen corresponding path program 22 times [2022-02-15 13:11:26,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:26,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652881990] [2022-02-15 13:11:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:26,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:26,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:26,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652881990] [2022-02-15 13:11:26,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652881990] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:26,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923067633] [2022-02-15 13:11:26,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:11:26,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:26,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:26,938 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) [2022-02-15 13:11:26,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-15 13:11:26,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:11:26,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:26,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:26,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:26,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:27,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923067633] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:27,050 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:27,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-15 13:11:27,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197191848] [2022-02-15 13:11:27,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:27,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:11:27,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:27,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:11:27,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:11:27,051 INFO L87 Difference]: Start difference. First operand 110 states and 289 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:27,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:27,210 INFO L93 Difference]: Finished difference Result 195 states and 401 transitions. [2022-02-15 13:11:27,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:11:27,211 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:27,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:27,211 INFO L225 Difference]: With dead ends: 195 [2022-02-15 13:11:27,212 INFO L226 Difference]: Without dead ends: 193 [2022-02-15 13:11:27,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:11:27,212 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 81 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:27,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 49 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:27,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-02-15 13:11:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 110. [2022-02-15 13:11:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.6422018348623855) internal successors, (288), 109 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:27,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 288 transitions. [2022-02-15 13:11:27,215 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 288 transitions. Word has length 15 [2022-02-15 13:11:27,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:27,215 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 288 transitions. [2022-02-15 13:11:27,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:27,215 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 288 transitions. [2022-02-15 13:11:27,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:27,216 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:27,216 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:27,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:27,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:27,427 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:27,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:27,428 INFO L85 PathProgramCache]: Analyzing trace with hash 111565565, now seen corresponding path program 23 times [2022-02-15 13:11:27,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:27,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614287041] [2022-02-15 13:11:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:27,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:27,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:27,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614287041] [2022-02-15 13:11:27,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614287041] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:27,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412785277] [2022-02-15 13:11:27,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:11:27,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:27,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:27,466 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) [2022-02-15 13:11:27,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-15 13:11:27,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:11:27,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:27,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:27,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:27,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:27,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412785277] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:27,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:27,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-15 13:11:27,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091976472] [2022-02-15 13:11:27,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:27,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:11:27,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:27,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:11:27,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:11:27,617 INFO L87 Difference]: Start difference. First operand 110 states and 288 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:27,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:27,866 INFO L93 Difference]: Finished difference Result 294 states and 549 transitions. [2022-02-15 13:11:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 13:11:27,867 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:27,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:27,868 INFO L225 Difference]: With dead ends: 294 [2022-02-15 13:11:27,868 INFO L226 Difference]: Without dead ends: 294 [2022-02-15 13:11:27,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=281, Invalid=475, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:11:27,868 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 136 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:27,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 79 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:27,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-02-15 13:11:27,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 110. [2022-02-15 13:11:27,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.6422018348623855) internal successors, (288), 109 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:27,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 288 transitions. [2022-02-15 13:11:27,872 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 288 transitions. Word has length 15 [2022-02-15 13:11:27,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:27,872 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 288 transitions. [2022-02-15 13:11:27,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:27,872 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 288 transitions. [2022-02-15 13:11:27,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:27,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:27,873 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:27,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:28,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-15 13:11:28,091 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:28,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:28,092 INFO L85 PathProgramCache]: Analyzing trace with hash -865122543, now seen corresponding path program 24 times [2022-02-15 13:11:28,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:28,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043680319] [2022-02-15 13:11:28,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:28,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:28,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:28,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043680319] [2022-02-15 13:11:28,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043680319] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:28,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663825990] [2022-02-15 13:11:28,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:11:28,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:28,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:28,132 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) [2022-02-15 13:11:28,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-15 13:11:28,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:11:28,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:28,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:28,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:28,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:28,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663825990] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:28,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:28,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-15 13:11:28,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758772566] [2022-02-15 13:11:28,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:28,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:28,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:28,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:28,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:28,246 INFO L87 Difference]: Start difference. First operand 110 states and 288 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:28,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:28,338 INFO L93 Difference]: Finished difference Result 156 states and 378 transitions. [2022-02-15 13:11:28,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:11:28,338 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:28,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:28,339 INFO L225 Difference]: With dead ends: 156 [2022-02-15 13:11:28,339 INFO L226 Difference]: Without dead ends: 153 [2022-02-15 13:11:28,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:11:28,339 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:28,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 11 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:28,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-02-15 13:11:28,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 110. [2022-02-15 13:11:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.63302752293578) internal successors, (287), 109 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:28,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 287 transitions. [2022-02-15 13:11:28,342 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 287 transitions. Word has length 15 [2022-02-15 13:11:28,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:28,342 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 287 transitions. [2022-02-15 13:11:28,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:28,342 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 287 transitions. [2022-02-15 13:11:28,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:28,343 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:28,343 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:28,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:28,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-15 13:11:28,551 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:28,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:28,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1600970561, now seen corresponding path program 25 times [2022-02-15 13:11:28,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:28,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277842920] [2022-02-15 13:11:28,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:28,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:28,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:28,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277842920] [2022-02-15 13:11:28,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277842920] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:28,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572359510] [2022-02-15 13:11:28,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:11:28,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:28,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:28,591 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) [2022-02-15 13:11:28,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-15 13:11:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:28,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:28,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:28,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:28,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572359510] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:28,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:28,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-15 13:11:28,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250520979] [2022-02-15 13:11:28,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:28,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:28,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:28,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:28,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:28,748 INFO L87 Difference]: Start difference. First operand 110 states and 287 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:28,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:28,951 INFO L93 Difference]: Finished difference Result 256 states and 515 transitions. [2022-02-15 13:11:28,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:11:28,951 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:28,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:28,952 INFO L225 Difference]: With dead ends: 256 [2022-02-15 13:11:28,952 INFO L226 Difference]: Without dead ends: 256 [2022-02-15 13:11:28,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:11:28,953 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 139 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:28,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 45 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:28,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-15 13:11:28,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 123. [2022-02-15 13:11:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.6885245901639343) internal successors, (328), 122 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 328 transitions. [2022-02-15 13:11:28,956 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 328 transitions. Word has length 15 [2022-02-15 13:11:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:28,956 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 328 transitions. [2022-02-15 13:11:28,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:28,956 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 328 transitions. [2022-02-15 13:11:28,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:28,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:28,957 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:28,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:29,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-15 13:11:29,157 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:29,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:29,157 INFO L85 PathProgramCache]: Analyzing trace with hash 23218281, now seen corresponding path program 26 times [2022-02-15 13:11:29,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:29,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992405143] [2022-02-15 13:11:29,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:29,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:29,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:29,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992405143] [2022-02-15 13:11:29,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992405143] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:29,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076648481] [2022-02-15 13:11:29,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:11:29,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:29,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:29,196 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) [2022-02-15 13:11:29,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-15 13:11:29,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:11:29,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:29,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:29,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:29,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:29,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076648481] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:29,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:29,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:29,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495910156] [2022-02-15 13:11:29,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:29,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:29,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:29,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:29,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:29,317 INFO L87 Difference]: Start difference. First operand 123 states and 328 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:29,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:29,594 INFO L93 Difference]: Finished difference Result 311 states and 588 transitions. [2022-02-15 13:11:29,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:11:29,594 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:29,599 INFO L225 Difference]: With dead ends: 311 [2022-02-15 13:11:29,599 INFO L226 Difference]: Without dead ends: 305 [2022-02-15 13:11:29,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=495, Invalid=987, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:11:29,600 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 168 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:29,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 39 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:29,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-15 13:11:29,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 123. [2022-02-15 13:11:29,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.6311475409836067) internal successors, (321), 122 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:29,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 321 transitions. [2022-02-15 13:11:29,610 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 321 transitions. Word has length 15 [2022-02-15 13:11:29,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:29,610 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 321 transitions. [2022-02-15 13:11:29,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:29,610 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 321 transitions. [2022-02-15 13:11:29,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:29,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:29,611 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:29,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:29,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:29,811 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:29,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:29,812 INFO L85 PathProgramCache]: Analyzing trace with hash 686306359, now seen corresponding path program 27 times [2022-02-15 13:11:29,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:29,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050649172] [2022-02-15 13:11:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:29,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:29,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:29,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050649172] [2022-02-15 13:11:29,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050649172] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:29,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026991809] [2022-02-15 13:11:29,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:11:29,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:29,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:29,849 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) [2022-02-15 13:11:29,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-15 13:11:29,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:11:29,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:29,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:29,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:29,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:29,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026991809] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:29,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:29,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:29,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518924209] [2022-02-15 13:11:29,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:29,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:29,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:29,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:29,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:29,985 INFO L87 Difference]: Start difference. First operand 123 states and 321 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:30,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:30,074 INFO L93 Difference]: Finished difference Result 199 states and 438 transitions. [2022-02-15 13:11:30,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:11:30,075 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:30,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:30,075 INFO L225 Difference]: With dead ends: 199 [2022-02-15 13:11:30,075 INFO L226 Difference]: Without dead ends: 199 [2022-02-15 13:11:30,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:11:30,076 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:30,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 43 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:30,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-02-15 13:11:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 128. [2022-02-15 13:11:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.6692913385826773) internal successors, (339), 127 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 339 transitions. [2022-02-15 13:11:30,079 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 339 transitions. Word has length 15 [2022-02-15 13:11:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:30,079 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 339 transitions. [2022-02-15 13:11:30,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:30,079 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 339 transitions. [2022-02-15 13:11:30,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:30,080 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:30,080 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:30,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:30,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:30,280 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:30,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:30,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1595229769, now seen corresponding path program 28 times [2022-02-15 13:11:30,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:30,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315391949] [2022-02-15 13:11:30,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:30,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:30,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:30,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315391949] [2022-02-15 13:11:30,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315391949] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:30,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37179247] [2022-02-15 13:11:30,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:11:30,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:30,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:30,326 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) [2022-02-15 13:11:30,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-15 13:11:30,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:11:30,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:30,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:30,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:30,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:30,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37179247] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:30,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:30,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:30,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543970094] [2022-02-15 13:11:30,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:30,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:30,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:30,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:30,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:30,462 INFO L87 Difference]: Start difference. First operand 128 states and 339 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:30,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:30,600 INFO L93 Difference]: Finished difference Result 208 states and 448 transitions. [2022-02-15 13:11:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:11:30,600 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:30,601 INFO L225 Difference]: With dead ends: 208 [2022-02-15 13:11:30,601 INFO L226 Difference]: Without dead ends: 207 [2022-02-15 13:11:30,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:11:30,604 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 91 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:30,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 33 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:30,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-02-15 13:11:30,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 128. [2022-02-15 13:11:30,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.6535433070866143) internal successors, (337), 127 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 337 transitions. [2022-02-15 13:11:30,608 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 337 transitions. Word has length 15 [2022-02-15 13:11:30,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:30,608 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 337 transitions. [2022-02-15 13:11:30,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:30,608 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 337 transitions. [2022-02-15 13:11:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:30,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:30,609 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:30,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:30,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:30,824 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:30,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:30,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1833653575, now seen corresponding path program 29 times [2022-02-15 13:11:30,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:30,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808891321] [2022-02-15 13:11:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:30,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:30,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:30,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808891321] [2022-02-15 13:11:30,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808891321] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:30,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84037613] [2022-02-15 13:11:30,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:11:30,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:30,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:30,863 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) [2022-02-15 13:11:30,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-15 13:11:30,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:11:30,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:30,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:30,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:30,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:31,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84037613] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:31,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:31,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:31,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295891895] [2022-02-15 13:11:31,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:31,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:31,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:31,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:31,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:31,013 INFO L87 Difference]: Start difference. First operand 128 states and 337 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:31,186 INFO L93 Difference]: Finished difference Result 284 states and 560 transitions. [2022-02-15 13:11:31,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:11:31,186 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:31,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:31,187 INFO L225 Difference]: With dead ends: 284 [2022-02-15 13:11:31,187 INFO L226 Difference]: Without dead ends: 284 [2022-02-15 13:11:31,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=214, Invalid=338, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:11:31,188 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 146 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:31,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 49 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:31,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-15 13:11:31,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 127. [2022-02-15 13:11:31,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.642857142857143) internal successors, (333), 126 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 333 transitions. [2022-02-15 13:11:31,191 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 333 transitions. Word has length 15 [2022-02-15 13:11:31,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:31,191 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 333 transitions. [2022-02-15 13:11:31,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:31,191 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 333 transitions. [2022-02-15 13:11:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:31,191 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:31,191 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:31,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-02-15 13:11:31,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-02-15 13:11:31,403 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:31,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:31,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1844430873, now seen corresponding path program 30 times [2022-02-15 13:11:31,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:31,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398759917] [2022-02-15 13:11:31,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:31,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:31,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:31,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398759917] [2022-02-15 13:11:31,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398759917] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:31,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142768615] [2022-02-15 13:11:31,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:11:31,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:31,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:31,441 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) [2022-02-15 13:11:31,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-15 13:11:31,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:11:31,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:31,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:31,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:31,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:31,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142768615] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:31,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:31,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-15 13:11:31,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482017866] [2022-02-15 13:11:31,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:31,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:11:31,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:31,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:11:31,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:11:31,564 INFO L87 Difference]: Start difference. First operand 127 states and 333 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:31,682 INFO L93 Difference]: Finished difference Result 212 states and 449 transitions. [2022-02-15 13:11:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:11:31,683 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:31,684 INFO L225 Difference]: With dead ends: 212 [2022-02-15 13:11:31,684 INFO L226 Difference]: Without dead ends: 210 [2022-02-15 13:11:31,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:31,684 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 69 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:31,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 37 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:31,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-15 13:11:31,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 127. [2022-02-15 13:11:31,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.634920634920635) internal successors, (332), 126 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 332 transitions. [2022-02-15 13:11:31,687 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 332 transitions. Word has length 15 [2022-02-15 13:11:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:31,687 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 332 transitions. [2022-02-15 13:11:31,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 332 transitions. [2022-02-15 13:11:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:31,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:31,688 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:31,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:31,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:31,888 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:31,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:31,889 INFO L85 PathProgramCache]: Analyzing trace with hash -123040267, now seen corresponding path program 31 times [2022-02-15 13:11:31,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:31,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068348392] [2022-02-15 13:11:31,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:31,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:31,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:31,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068348392] [2022-02-15 13:11:31,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068348392] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:31,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355843636] [2022-02-15 13:11:31,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:11:31,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:31,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:31,926 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) [2022-02-15 13:11:31,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-15 13:11:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:31,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:31,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:31,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:32,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355843636] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:32,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:32,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-15 13:11:32,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094265293] [2022-02-15 13:11:32,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:32,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:11:32,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:32,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:11:32,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:11:32,053 INFO L87 Difference]: Start difference. First operand 127 states and 332 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:32,309 INFO L93 Difference]: Finished difference Result 299 states and 576 transitions. [2022-02-15 13:11:32,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 13:11:32,310 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:32,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:32,311 INFO L225 Difference]: With dead ends: 299 [2022-02-15 13:11:32,311 INFO L226 Difference]: Without dead ends: 299 [2022-02-15 13:11:32,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=555, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:11:32,311 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 162 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:32,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 65 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:32,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-15 13:11:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 127. [2022-02-15 13:11:32,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.634920634920635) internal successors, (332), 126 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 332 transitions. [2022-02-15 13:11:32,315 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 332 transitions. Word has length 15 [2022-02-15 13:11:32,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:32,315 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 332 transitions. [2022-02-15 13:11:32,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 332 transitions. [2022-02-15 13:11:32,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:32,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:32,315 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:32,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:32,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:32,523 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:32,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:32,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1099728375, now seen corresponding path program 32 times [2022-02-15 13:11:32,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:32,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491073106] [2022-02-15 13:11:32,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:32,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:32,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:32,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491073106] [2022-02-15 13:11:32,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491073106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:32,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043647554] [2022-02-15 13:11:32,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:11:32,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:32,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:32,588 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) [2022-02-15 13:11:32,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-15 13:11:32,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:11:32,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:32,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:32,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:32,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:32,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043647554] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:32,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:32,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-15 13:11:32,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523318053] [2022-02-15 13:11:32,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:32,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:32,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:32,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:32,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:32,710 INFO L87 Difference]: Start difference. First operand 127 states and 332 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:32,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:32,818 INFO L93 Difference]: Finished difference Result 180 states and 425 transitions. [2022-02-15 13:11:32,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:11:32,818 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:32,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:32,819 INFO L225 Difference]: With dead ends: 180 [2022-02-15 13:11:32,819 INFO L226 Difference]: Without dead ends: 177 [2022-02-15 13:11:32,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:11:32,820 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 58 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:32,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 31 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:32,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-15 13:11:32,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 127. [2022-02-15 13:11:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.626984126984127) internal successors, (331), 126 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:32,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 331 transitions. [2022-02-15 13:11:32,836 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 331 transitions. Word has length 15 [2022-02-15 13:11:32,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:32,836 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 331 transitions. [2022-02-15 13:11:32,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:32,836 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 331 transitions. [2022-02-15 13:11:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:32,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:32,837 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:32,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-02-15 13:11:33,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-15 13:11:33,047 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:33,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:33,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1366364729, now seen corresponding path program 33 times [2022-02-15 13:11:33,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:33,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957448951] [2022-02-15 13:11:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:33,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:33,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:33,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957448951] [2022-02-15 13:11:33,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957448951] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:33,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910910036] [2022-02-15 13:11:33,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:11:33,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:33,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:33,086 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) [2022-02-15 13:11:33,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-15 13:11:33,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:11:33,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:33,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:33,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:33,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:33,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910910036] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:33,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:33,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-15 13:11:33,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823381155] [2022-02-15 13:11:33,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:33,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:33,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:33,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:33,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:33,209 INFO L87 Difference]: Start difference. First operand 127 states and 331 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:33,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:33,419 INFO L93 Difference]: Finished difference Result 223 states and 454 transitions. [2022-02-15 13:11:33,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:11:33,419 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:33,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:33,420 INFO L225 Difference]: With dead ends: 223 [2022-02-15 13:11:33,420 INFO L226 Difference]: Without dead ends: 223 [2022-02-15 13:11:33,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:11:33,421 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 79 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:33,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 63 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:33,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-02-15 13:11:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 127. [2022-02-15 13:11:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.626984126984127) internal successors, (331), 126 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:33,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 331 transitions. [2022-02-15 13:11:33,423 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 331 transitions. Word has length 15 [2022-02-15 13:11:33,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:33,423 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 331 transitions. [2022-02-15 13:11:33,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:33,424 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 331 transitions. [2022-02-15 13:11:33,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:33,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:33,424 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:33,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-15 13:11:33,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-15 13:11:33,631 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:33,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:33,632 INFO L85 PathProgramCache]: Analyzing trace with hash 511212583, now seen corresponding path program 34 times [2022-02-15 13:11:33,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:33,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938334406] [2022-02-15 13:11:33,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:33,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:33,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:33,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938334406] [2022-02-15 13:11:33,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938334406] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:33,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306718528] [2022-02-15 13:11:33,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:11:33,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:33,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:33,674 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) [2022-02-15 13:11:33,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-15 13:11:33,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:11:33,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:33,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:33,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:33,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:33,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306718528] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:33,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:33,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-02-15 13:11:33,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833399666] [2022-02-15 13:11:33,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:33,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:11:33,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:33,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:11:33,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:11:33,784 INFO L87 Difference]: Start difference. First operand 127 states and 331 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:33,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:33,869 INFO L93 Difference]: Finished difference Result 169 states and 412 transitions. [2022-02-15 13:11:33,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:11:33,869 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-15 13:11:33,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:33,870 INFO L225 Difference]: With dead ends: 169 [2022-02-15 13:11:33,870 INFO L226 Difference]: Without dead ends: 165 [2022-02-15 13:11:33,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:11:33,870 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:33,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 15 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:11:33,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-02-15 13:11:33,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 127. [2022-02-15 13:11:33,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.619047619047619) internal successors, (330), 126 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:33,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 330 transitions. [2022-02-15 13:11:33,873 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 330 transitions. Word has length 15 [2022-02-15 13:11:33,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:33,873 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 330 transitions. [2022-02-15 13:11:33,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:33,873 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 330 transitions. [2022-02-15 13:11:33,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:33,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:33,874 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:33,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:34,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-15 13:11:34,074 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:34,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:34,075 INFO L85 PathProgramCache]: Analyzing trace with hash 293279349, now seen corresponding path program 35 times [2022-02-15 13:11:34,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:34,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191966611] [2022-02-15 13:11:34,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:34,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:34,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:34,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191966611] [2022-02-15 13:11:34,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191966611] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:34,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696480625] [2022-02-15 13:11:34,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:11:34,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:34,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:34,117 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) [2022-02-15 13:11:34,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-15 13:11:34,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:11:34,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:34,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:34,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:34,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:34,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696480625] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:34,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:34,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-02-15 13:11:34,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425705061] [2022-02-15 13:11:34,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:34,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:11:34,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:34,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:11:34,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:11:34,230 INFO L87 Difference]: Start difference. First operand 127 states and 330 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:34,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:34,403 INFO L93 Difference]: Finished difference Result 215 states and 468 transitions. [2022-02-15 13:11:34,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:11:34,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-15 13:11:34,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:34,404 INFO L225 Difference]: With dead ends: 215 [2022-02-15 13:11:34,404 INFO L226 Difference]: Without dead ends: 215 [2022-02-15 13:11:34,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:11:34,405 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:34,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 39 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:34,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-02-15 13:11:34,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 133. [2022-02-15 13:11:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.643939393939394) internal successors, (349), 132 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 349 transitions. [2022-02-15 13:11:34,408 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 349 transitions. Word has length 15 [2022-02-15 13:11:34,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:34,408 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 349 transitions. [2022-02-15 13:11:34,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 349 transitions. [2022-02-15 13:11:34,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:34,409 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:34,409 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:34,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:34,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-15 13:11:34,623 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:34,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:34,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1340372081, now seen corresponding path program 36 times [2022-02-15 13:11:34,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:34,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154607192] [2022-02-15 13:11:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:34,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:34,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:34,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154607192] [2022-02-15 13:11:34,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154607192] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:34,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138295161] [2022-02-15 13:11:34,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:11:34,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:34,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:34,668 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) [2022-02-15 13:11:34,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-15 13:11:34,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:11:34,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:34,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:34,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:34,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:34,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138295161] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:34,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:34,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:34,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214128347] [2022-02-15 13:11:34,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:34,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:34,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:34,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:34,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:34,777 INFO L87 Difference]: Start difference. First operand 133 states and 349 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:35,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:35,098 INFO L93 Difference]: Finished difference Result 310 states and 618 transitions. [2022-02-15 13:11:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:11:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:35,099 INFO L225 Difference]: With dead ends: 310 [2022-02-15 13:11:35,099 INFO L226 Difference]: Without dead ends: 306 [2022-02-15 13:11:35,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=488, Invalid=994, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:11:35,100 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 116 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:35,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 59 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:35,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-02-15 13:11:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 139. [2022-02-15 13:11:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.6884057971014492) internal successors, (371), 138 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 371 transitions. [2022-02-15 13:11:35,103 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 371 transitions. Word has length 15 [2022-02-15 13:11:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:35,103 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 371 transitions. [2022-02-15 13:11:35,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 371 transitions. [2022-02-15 13:11:35,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:35,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:35,104 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:35,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:35,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-15 13:11:35,320 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:35,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:35,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2003460159, now seen corresponding path program 37 times [2022-02-15 13:11:35,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:35,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518385142] [2022-02-15 13:11:35,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:35,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:35,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:35,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518385142] [2022-02-15 13:11:35,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518385142] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:35,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665356454] [2022-02-15 13:11:35,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:11:35,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:35,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:35,348 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) [2022-02-15 13:11:35,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-15 13:11:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:35,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:35,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:35,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:35,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665356454] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:35,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:35,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:35,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049424245] [2022-02-15 13:11:35,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:35,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:35,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:35,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:35,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:35,472 INFO L87 Difference]: Start difference. First operand 139 states and 371 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:35,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:35,547 INFO L93 Difference]: Finished difference Result 231 states and 519 transitions. [2022-02-15 13:11:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:11:35,547 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:35,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:35,548 INFO L225 Difference]: With dead ends: 231 [2022-02-15 13:11:35,548 INFO L226 Difference]: Without dead ends: 231 [2022-02-15 13:11:35,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:11:35,548 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 67 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:35,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 45 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:35,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-02-15 13:11:35,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 145. [2022-02-15 13:11:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.736111111111111) internal successors, (394), 144 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 394 transitions. [2022-02-15 13:11:35,555 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 394 transitions. Word has length 15 [2022-02-15 13:11:35,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:35,555 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 394 transitions. [2022-02-15 13:11:35,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:35,555 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 394 transitions. [2022-02-15 13:11:35,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:35,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:35,555 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:35,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:35,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-02-15 13:11:35,771 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:35,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1382583727, now seen corresponding path program 38 times [2022-02-15 13:11:35,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:35,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952020512] [2022-02-15 13:11:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:35,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:35,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:35,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952020512] [2022-02-15 13:11:35,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952020512] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:35,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095136978] [2022-02-15 13:11:35,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:11:35,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:35,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:35,812 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) [2022-02-15 13:11:35,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:11:35,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:35,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:35,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:35,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-15 13:11:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:35,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:35,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095136978] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:35,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:35,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:35,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545319402] [2022-02-15 13:11:35,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:35,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:35,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:35,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:35,951 INFO L87 Difference]: Start difference. First operand 145 states and 394 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:36,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:36,048 INFO L93 Difference]: Finished difference Result 230 states and 512 transitions. [2022-02-15 13:11:36,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:11:36,049 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:36,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:36,050 INFO L225 Difference]: With dead ends: 230 [2022-02-15 13:11:36,050 INFO L226 Difference]: Without dead ends: 229 [2022-02-15 13:11:36,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:11:36,050 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 105 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:36,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 29 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:36,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-15 13:11:36,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 145. [2022-02-15 13:11:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.7291666666666665) internal successors, (393), 144 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 393 transitions. [2022-02-15 13:11:36,054 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 393 transitions. Word has length 15 [2022-02-15 13:11:36,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:36,054 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 393 transitions. [2022-02-15 13:11:36,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 393 transitions. [2022-02-15 13:11:36,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:36,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:36,055 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:36,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:36,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-02-15 13:11:36,271 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:36,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:36,271 INFO L85 PathProgramCache]: Analyzing trace with hash -516499775, now seen corresponding path program 39 times [2022-02-15 13:11:36,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:36,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064296464] [2022-02-15 13:11:36,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:36,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:36,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:36,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064296464] [2022-02-15 13:11:36,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064296464] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:36,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683748899] [2022-02-15 13:11:36,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:11:36,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:36,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:36,337 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) [2022-02-15 13:11:36,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-15 13:11:36,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:11:36,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:36,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:36,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:36,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:36,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683748899] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:36,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:36,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-02-15 13:11:36,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305961251] [2022-02-15 13:11:36,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:36,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:36,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:36,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:36,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:36,511 INFO L87 Difference]: Start difference. First operand 145 states and 393 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:36,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:36,671 INFO L93 Difference]: Finished difference Result 288 states and 597 transitions. [2022-02-15 13:11:36,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:11:36,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:36,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:36,672 INFO L225 Difference]: With dead ends: 288 [2022-02-15 13:11:36,672 INFO L226 Difference]: Without dead ends: 287 [2022-02-15 13:11:36,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=379, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:11:36,672 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 214 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:36,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 29 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:36,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-15 13:11:36,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 146. [2022-02-15 13:11:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.6551724137931036) internal successors, (385), 145 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 385 transitions. [2022-02-15 13:11:36,675 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 385 transitions. Word has length 15 [2022-02-15 13:11:36,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:36,675 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 385 transitions. [2022-02-15 13:11:36,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:36,675 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 385 transitions. [2022-02-15 13:11:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:36,676 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:36,676 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:36,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:36,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-02-15 13:11:36,876 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:36,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:36,877 INFO L85 PathProgramCache]: Analyzing trace with hash -527277073, now seen corresponding path program 40 times [2022-02-15 13:11:36,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:36,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256848722] [2022-02-15 13:11:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:36,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:36,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:36,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256848722] [2022-02-15 13:11:36,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256848722] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:36,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638625104] [2022-02-15 13:11:36,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:11:36,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:36,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:36,914 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) [2022-02-15 13:11:36,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-15 13:11:36,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:11:36,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:36,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:36,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:36,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:37,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638625104] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:37,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:37,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-15 13:11:37,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273135495] [2022-02-15 13:11:37,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:37,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:11:37,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:37,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:11:37,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:11:37,037 INFO L87 Difference]: Start difference. First operand 146 states and 385 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:37,146 INFO L93 Difference]: Finished difference Result 232 states and 503 transitions. [2022-02-15 13:11:37,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:11:37,146 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:37,147 INFO L225 Difference]: With dead ends: 232 [2022-02-15 13:11:37,147 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 13:11:37,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:37,149 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 93 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:37,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 37 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:37,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 13:11:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 146. [2022-02-15 13:11:37,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.6482758620689655) internal successors, (384), 145 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 384 transitions. [2022-02-15 13:11:37,152 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 384 transitions. Word has length 15 [2022-02-15 13:11:37,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:37,152 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 384 transitions. [2022-02-15 13:11:37,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:37,153 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 384 transitions. [2022-02-15 13:11:37,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:37,153 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:37,153 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:37,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:37,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:37,356 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:37,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:37,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1194113533, now seen corresponding path program 41 times [2022-02-15 13:11:37,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:37,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978896057] [2022-02-15 13:11:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:37,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:37,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:37,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978896057] [2022-02-15 13:11:37,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978896057] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:37,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823533847] [2022-02-15 13:11:37,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:11:37,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:37,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:37,397 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) [2022-02-15 13:11:37,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-15 13:11:37,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:11:37,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:37,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:37,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:37,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:37,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823533847] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:37,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:37,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-15 13:11:37,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207557300] [2022-02-15 13:11:37,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:37,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:11:37,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:37,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:11:37,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:11:37,531 INFO L87 Difference]: Start difference. First operand 146 states and 384 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:37,724 INFO L93 Difference]: Finished difference Result 308 states and 614 transitions. [2022-02-15 13:11:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 13:11:37,733 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:37,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:37,734 INFO L225 Difference]: With dead ends: 308 [2022-02-15 13:11:37,734 INFO L226 Difference]: Without dead ends: 308 [2022-02-15 13:11:37,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=370, Invalid=686, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:11:37,735 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 127 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:37,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 75 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:37,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-15 13:11:37,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 144. [2022-02-15 13:11:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.6363636363636362) internal successors, (377), 143 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:37,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 377 transitions. [2022-02-15 13:11:37,738 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 377 transitions. Word has length 15 [2022-02-15 13:11:37,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:37,738 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 377 transitions. [2022-02-15 13:11:37,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:37,738 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 377 transitions. [2022-02-15 13:11:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:37,738 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:37,738 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:37,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:37,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:37,955 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:37,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:37,955 INFO L85 PathProgramCache]: Analyzing trace with hash 217425425, now seen corresponding path program 42 times [2022-02-15 13:11:37,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:37,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870170850] [2022-02-15 13:11:37,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:37,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:37,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:37,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870170850] [2022-02-15 13:11:37,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870170850] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:37,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687570744] [2022-02-15 13:11:37,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:11:37,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:37,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:37,992 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) [2022-02-15 13:11:37,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-15 13:11:38,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:11:38,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:38,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:38,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:38,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:38,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687570744] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:38,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:38,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-15 13:11:38,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475684120] [2022-02-15 13:11:38,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:38,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:38,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:38,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:38,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:38,083 INFO L87 Difference]: Start difference. First operand 144 states and 377 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:38,164 INFO L93 Difference]: Finished difference Result 199 states and 472 transitions. [2022-02-15 13:11:38,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:11:38,164 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:38,165 INFO L225 Difference]: With dead ends: 199 [2022-02-15 13:11:38,165 INFO L226 Difference]: Without dead ends: 196 [2022-02-15 13:11:38,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:38,165 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 76 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:38,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 15 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:11:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-02-15 13:11:38,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2022-02-15 13:11:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.629370629370629) internal successors, (376), 143 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:38,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 376 transitions. [2022-02-15 13:11:38,167 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 376 transitions. Word has length 15 [2022-02-15 13:11:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:38,168 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 376 transitions. [2022-02-15 13:11:38,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:38,168 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 376 transitions. [2022-02-15 13:11:38,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:38,168 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:38,168 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:38,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:38,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-15 13:11:38,384 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:38,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:38,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1611448767, now seen corresponding path program 43 times [2022-02-15 13:11:38,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:38,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826815913] [2022-02-15 13:11:38,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:38,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:38,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:38,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826815913] [2022-02-15 13:11:38,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826815913] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:38,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676842764] [2022-02-15 13:11:38,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:11:38,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:38,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:38,438 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) [2022-02-15 13:11:38,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-15 13:11:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:38,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:38,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:38,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:38,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676842764] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:38,560 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:38,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-15 13:11:38,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680553288] [2022-02-15 13:11:38,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:38,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:11:38,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:38,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:11:38,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:11:38,561 INFO L87 Difference]: Start difference. First operand 144 states and 376 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:38,781 INFO L93 Difference]: Finished difference Result 248 states and 529 transitions. [2022-02-15 13:11:38,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 13:11:38,782 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:38,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:38,783 INFO L225 Difference]: With dead ends: 248 [2022-02-15 13:11:38,783 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 13:11:38,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=682, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:11:38,783 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:38,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 57 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:38,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 13:11:38,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 148. [2022-02-15 13:11:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.6462585034013606) internal successors, (389), 147 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:38,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 389 transitions. [2022-02-15 13:11:38,786 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 389 transitions. Word has length 15 [2022-02-15 13:11:38,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:38,786 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 389 transitions. [2022-02-15 13:11:38,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:38,786 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 389 transitions. [2022-02-15 13:11:38,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:38,786 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:38,786 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:38,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-02-15 13:11:39,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-15 13:11:39,003 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:39,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:39,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1828366383, now seen corresponding path program 44 times [2022-02-15 13:11:39,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:39,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823758136] [2022-02-15 13:11:39,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:39,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:39,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:39,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823758136] [2022-02-15 13:11:39,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823758136] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:39,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606426232] [2022-02-15 13:11:39,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:11:39,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:39,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:39,043 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) [2022-02-15 13:11:39,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-15 13:11:39,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:11:39,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:39,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:39,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:39,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:39,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606426232] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:39,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:39,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-02-15 13:11:39,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130081864] [2022-02-15 13:11:39,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:39,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:11:39,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:39,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:11:39,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:11:39,148 INFO L87 Difference]: Start difference. First operand 148 states and 389 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:39,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:39,235 INFO L93 Difference]: Finished difference Result 202 states and 482 transitions. [2022-02-15 13:11:39,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:11:39,236 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:39,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:39,236 INFO L225 Difference]: With dead ends: 202 [2022-02-15 13:11:39,236 INFO L226 Difference]: Without dead ends: 198 [2022-02-15 13:11:39,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:11:39,237 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:39,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 25 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:11:39,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-02-15 13:11:39,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 148. [2022-02-15 13:11:39,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.639455782312925) internal successors, (388), 147 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:39,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 388 transitions. [2022-02-15 13:11:39,239 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 388 transitions. Word has length 15 [2022-02-15 13:11:39,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:39,239 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 388 transitions. [2022-02-15 13:11:39,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:39,239 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 388 transitions. [2022-02-15 13:11:39,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:39,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:39,240 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:39,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:39,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-02-15 13:11:39,440 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:39,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1610433149, now seen corresponding path program 45 times [2022-02-15 13:11:39,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:39,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437372819] [2022-02-15 13:11:39,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:39,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:39,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:39,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437372819] [2022-02-15 13:11:39,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437372819] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:39,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434401068] [2022-02-15 13:11:39,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:11:39,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:39,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:39,490 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) [2022-02-15 13:11:39,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-15 13:11:39,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:11:39,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:39,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:39,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:39,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:39,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434401068] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:39,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:39,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-02-15 13:11:39,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900265168] [2022-02-15 13:11:39,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:39,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:11:39,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:39,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:11:39,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:11:39,588 INFO L87 Difference]: Start difference. First operand 148 states and 388 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:39,772 INFO L93 Difference]: Finished difference Result 222 states and 508 transitions. [2022-02-15 13:11:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:11:39,772 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:39,773 INFO L225 Difference]: With dead ends: 222 [2022-02-15 13:11:39,773 INFO L226 Difference]: Without dead ends: 222 [2022-02-15 13:11:39,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=572, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:11:39,774 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:39,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 23 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:39,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-02-15 13:11:39,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 154. [2022-02-15 13:11:39,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.65359477124183) internal successors, (406), 153 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:39,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 406 transitions. [2022-02-15 13:11:39,796 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 406 transitions. Word has length 15 [2022-02-15 13:11:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:39,797 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 406 transitions. [2022-02-15 13:11:39,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:39,797 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 406 transitions. [2022-02-15 13:11:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:39,797 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:39,797 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:39,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:40,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:40,014 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:40,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:40,014 INFO L85 PathProgramCache]: Analyzing trace with hash 227928529, now seen corresponding path program 46 times [2022-02-15 13:11:40,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:40,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508543627] [2022-02-15 13:11:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:40,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:40,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:40,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508543627] [2022-02-15 13:11:40,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508543627] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:40,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955328019] [2022-02-15 13:11:40,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:11:40,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:40,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:40,064 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) [2022-02-15 13:11:40,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-15 13:11:40,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:11:40,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:40,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:40,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:40,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:40,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955328019] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:40,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:40,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-02-15 13:11:40,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12067213] [2022-02-15 13:11:40,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:40,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:11:40,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:40,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:11:40,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:11:40,164 INFO L87 Difference]: Start difference. First operand 154 states and 406 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:40,248 INFO L93 Difference]: Finished difference Result 196 states and 486 transitions. [2022-02-15 13:11:40,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:11:40,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-15 13:11:40,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:40,249 INFO L225 Difference]: With dead ends: 196 [2022-02-15 13:11:40,249 INFO L226 Difference]: Without dead ends: 191 [2022-02-15 13:11:40,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:11:40,250 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:40,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 11 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:11:40,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-02-15 13:11:40,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 153. [2022-02-15 13:11:40,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.6578947368421053) internal successors, (404), 152 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:40,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 404 transitions. [2022-02-15 13:11:40,252 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 404 transitions. Word has length 15 [2022-02-15 13:11:40,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:40,252 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 404 transitions. [2022-02-15 13:11:40,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 404 transitions. [2022-02-15 13:11:40,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:11:40,253 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:40,253 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:40,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:40,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-15 13:11:40,459 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:40,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:40,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1590442559, now seen corresponding path program 47 times [2022-02-15 13:11:40,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:40,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705874159] [2022-02-15 13:11:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:40,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:40,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:40,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705874159] [2022-02-15 13:11:40,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705874159] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:40,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069576422] [2022-02-15 13:11:40,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:11:40,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:40,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:40,499 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) [2022-02-15 13:11:40,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-15 13:11:40,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:11:40,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:40,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:11:40,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:40,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:40,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069576422] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:40,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:40,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-02-15 13:11:40,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357743166] [2022-02-15 13:11:40,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:40,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:11:40,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:40,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:11:40,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:11:40,605 INFO L87 Difference]: Start difference. First operand 153 states and 404 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:40,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:40,748 INFO L93 Difference]: Finished difference Result 231 states and 552 transitions. [2022-02-15 13:11:40,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:11:40,748 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-15 13:11:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:40,749 INFO L225 Difference]: With dead ends: 231 [2022-02-15 13:11:40,749 INFO L226 Difference]: Without dead ends: 231 [2022-02-15 13:11:40,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:11:40,749 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:40,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 21 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:40,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-02-15 13:11:40,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 161. [2022-02-15 13:11:40,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.6625) internal successors, (426), 160 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:40,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 426 transitions. [2022-02-15 13:11:40,752 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 426 transitions. Word has length 15 [2022-02-15 13:11:40,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:40,752 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 426 transitions. [2022-02-15 13:11:40,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:40,752 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 426 transitions. [2022-02-15 13:11:40,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:11:40,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:40,753 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:40,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:40,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:40,965 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:40,965 INFO L85 PathProgramCache]: Analyzing trace with hash -949990882, now seen corresponding path program 48 times [2022-02-15 13:11:40,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:40,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558885892] [2022-02-15 13:11:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:40,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:11:41,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:41,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558885892] [2022-02-15 13:11:41,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558885892] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:41,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933638605] [2022-02-15 13:11:41,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:11:41,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:41,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:41,041 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) [2022-02-15 13:11:41,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-15 13:11:41,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:11:41,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:41,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:41,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:11:41,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-15 13:11:41,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933638605] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:41,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:41,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2022-02-15 13:11:41,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631325762] [2022-02-15 13:11:41,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:41,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 13:11:41,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:41,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 13:11:41,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:11:41,210 INFO L87 Difference]: Start difference. First operand 161 states and 426 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:41,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:41,385 INFO L93 Difference]: Finished difference Result 557 states and 1455 transitions. [2022-02-15 13:11:41,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:11:41,385 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:11:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:41,387 INFO L225 Difference]: With dead ends: 557 [2022-02-15 13:11:41,387 INFO L226 Difference]: Without dead ends: 552 [2022-02-15 13:11:41,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:11:41,388 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 113 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:41,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 23 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:41,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-02-15 13:11:41,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 317. [2022-02-15 13:11:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.6297468354430378) internal successors, (831), 316 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 831 transitions. [2022-02-15 13:11:41,393 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 831 transitions. Word has length 16 [2022-02-15 13:11:41,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:41,393 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 831 transitions. [2022-02-15 13:11:41,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:41,393 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 831 transitions. [2022-02-15 13:11:41,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:11:41,394 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:41,394 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:41,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:41,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-02-15 13:11:41,608 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:41,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:41,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1859061101, now seen corresponding path program 49 times [2022-02-15 13:11:41,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:41,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296955339] [2022-02-15 13:11:41,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:41,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:41,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:41,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296955339] [2022-02-15 13:11:41,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296955339] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:41,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010509669] [2022-02-15 13:11:41,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:11:41,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:41,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:41,684 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) [2022-02-15 13:11:41,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-15 13:11:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:41,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-15 13:11:41,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:41,926 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:11:41,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2022-02-15 13:11:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:42,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:44,151 INFO L353 Elim1Store]: treesize reduction 40, result has 95.8 percent of original size [2022-02-15 13:11:44,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 30 new quantified variables, introduced 120 case distinctions, treesize of input 35 treesize of output 980 Received shutdown request... [2022-02-15 13:25:21,255 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 [2022-02-15 13:25:21,255 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-15 13:25:21,263 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-02-15 13:25:21,265 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-15 13:25:21,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-15 13:25:21,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-02-15 13:25:21,467 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 8,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 16ms.. [2022-02-15 13:25:21,469 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-15 13:25:21,469 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-15 13:25:21,471 INFO L732 BasicCegarLoop]: Path program histogram: [49, 2, 1, 1] [2022-02-15 13:25:21,473 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-15 13:25:21,473 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 13:25:21,474 INFO L202 PluginConnector]: Adding new model unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 01:25:21 BasicIcfg [2022-02-15 13:25:21,474 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 13:25:21,475 INFO L158 Benchmark]: Toolchain (without parser) took 869332.54ms. Allocated memory was 204.5MB in the beginning and 965.7MB in the end (delta: 761.3MB). Free memory was 161.7MB in the beginning and 617.5MB in the end (delta: -455.8MB). Peak memory consumption was 580.9MB. Max. memory is 8.0GB. [2022-02-15 13:25:21,475 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 204.5MB. Free memory is still 162.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 13:25:21,475 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.09ms. Allocated memory is still 204.5MB. Free memory was 161.5MB in the beginning and 160.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 13:25:21,475 INFO L158 Benchmark]: Boogie Preprocessor took 13.88ms. Allocated memory is still 204.5MB. Free memory was 160.0MB in the beginning and 159.0MB in the end (delta: 957.8kB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-15 13:25:21,475 INFO L158 Benchmark]: RCFGBuilder took 225.32ms. Allocated memory is still 204.5MB. Free memory was 159.0MB in the beginning and 148.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-15 13:25:21,475 INFO L158 Benchmark]: TraceAbstraction took 869067.06ms. Allocated memory was 204.5MB in the beginning and 965.7MB in the end (delta: 761.3MB). Free memory was 148.2MB in the beginning and 617.5MB in the end (delta: -469.2MB). Peak memory consumption was 567.2MB. Max. memory is 8.0GB. [2022-02-15 13:25:21,475 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 0.10ms. Allocated memory is still 204.5MB. Free memory is still 162.7MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.09ms. Allocated memory is still 204.5MB. Free memory was 161.5MB in the beginning and 160.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 13.88ms. Allocated memory is still 204.5MB. Free memory was 160.0MB in the beginning and 159.0MB in the end (delta: 957.8kB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 225.32ms. Allocated memory is still 204.5MB. Free memory was 159.0MB in the beginning and 148.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 869067.06ms. Allocated memory was 204.5MB in the beginning and 965.7MB in the end (delta: 761.3MB). Free memory was 148.2MB in the beginning and 617.5MB in the end (delta: -469.2MB). Peak memory consumption was 567.2MB. 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: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 8,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 16ms.. - TimeoutResultAtElement [Line: 52]: 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 20 with TraceHistMax 8,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 16ms.. - TimeoutResultAtElement [Line: 52]: 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 20 with TraceHistMax 8,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 16ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 869.0s, OverallIterations: 53, TraceHistogramMax: 8, PathProgramHistogramMax: 49, EmptinessCheckTime: 0.0s, AutomataDifference: 7.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4239 SdHoareTripleChecker+Valid, 4.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4239 mSDsluCounter, 1890 SdHoareTripleChecker+Invalid, 3.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4533 mSDsCounter, 1200 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8090 IncrementalHoareTripleChecker+Invalid, 9290 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1200 mSolverCounterUnsat, 312 mSDtfsCounter, 8090 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2157 GetRequests, 1063 SyntacticMatches, 83 SemanticMatches, 1011 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6041 ImplicationChecksByTransitivity, 6.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=317occurred in iteration=52, InterpolantAutomatonStates: 887, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 52 MinimizatonAttempts, 4444 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 29.1s InterpolantComputationTime, 1469 NumberOfCodeBlocks, 1469 NumberOfCodeBlocksAsserted, 170 NumberOfCheckSat, 2039 ConstructedInterpolants, 0 QuantifiedInterpolants, 11173 SizeOfPredicates, 85 NumberOfNonLiveVariables, 2669 ConjunctsInSsa, 434 ConjunctsInUnsatCore, 150 InterpolantComputations, 3 PerfectInterpolantSequences, 776/1991 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