/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 20:09:00,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 20:09:00,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 20:09:00,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 20:09:00,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 20:09:00,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 20:09:00,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 20:09:00,719 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-03 20:09:00,741 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 20:09:00,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 20:09:00,741 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 20:09:00,741 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 20:09:00,742 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 20:09:00,742 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 20:09:00,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 20:09:00,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 20:09:00,742 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 20:09:00,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 20:09:00,742 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 20:09:00,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 20:09:00,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 20:09:00,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 20:09:00,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 20:09:00,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 20:09:00,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 20:09:00,743 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 20:09:00,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 20:09:00,743 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 20:09:00,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 20:09:00,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 20:09:00,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 20:09:00,746 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 20:09:00,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 20:09:00,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 20:09:00,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 20:09:00,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 20:09:00,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 20:09:00,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 20:09:00,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 20:09:00,746 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 20:09:00,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 20:09:00,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 20:09:00,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 20:09:00,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 20:09:00,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 20:09:00,959 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 20:09:00,961 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 20:09:00,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl [2022-03-03 20:09:00,963 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl' [2022-03-03 20:09:00,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 20:09:00,990 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 20:09:00,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 20:09:00,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 20:09:00,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 20:09:01,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:09:00" (1/1) ... [2022-03-03 20:09:01,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:09:00" (1/1) ... [2022-03-03 20:09:01,010 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 20:09:01,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 20:09:01,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 20:09:01,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 20:09:01,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 20:09:01,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:09:00" (1/1) ... [2022-03-03 20:09:01,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:09:00" (1/1) ... [2022-03-03 20:09:01,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:09:00" (1/1) ... [2022-03-03 20:09:01,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:09:00" (1/1) ... [2022-03-03 20:09:01,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:09:00" (1/1) ... [2022-03-03 20:09:01,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:09:00" (1/1) ... [2022-03-03 20:09:01,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:09:00" (1/1) ... [2022-03-03 20:09:01,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 20:09:01,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 20:09:01,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 20:09:01,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 20:09:01,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:09:00" (1/1) ... [2022-03-03 20:09:01,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 20:09:01,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:01,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-03 20:09:01,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-03 20:09:01,087 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 20:09:01,087 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 20:09:01,087 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 20:09:01,087 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 20:09:01,088 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 20:09:01,088 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 20:09:01,088 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 20:09:01,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 20:09:01,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 20:09:01,088 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 20:09:01,121 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 20:09:01,122 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 20:09:01,226 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 20:09:01,236 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 20:09:01,236 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 20:09:01,238 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 08:09:01 BoogieIcfgContainer [2022-03-03 20:09:01,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 20:09:01,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 20:09:01,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 20:09:01,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 20:09:01,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:09:00" (1/2) ... [2022-03-03 20:09:01,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37544888 and model type nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 08:09:01, skipping insertion in model container [2022-03-03 20:09:01,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 08:09:01" (2/2) ... [2022-03-03 20:09:01,257 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-counter-alt2.wvr.bpl [2022-03-03 20:09:01,264 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 20:09:01,265 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 20:09:01,265 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 20:09:01,265 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 20:09:01,304 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-03 20:09:01,350 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 20:09:01,358 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 20:09:01,359 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-03 20:09:01,368 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2022-03-03 20:09:01,386 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:01,388 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:01,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 20:09:01,393 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:01,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:01,394 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:09:01,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:01,401 INFO L85 PathProgramCache]: Analyzing trace with hash -618238623, now seen corresponding path program 1 times [2022-03-03 20:09:01,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:01,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374729707] [2022-03-03 20:09:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:01,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:01,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:01,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374729707] [2022-03-03 20:09:01,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374729707] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:09:01,574 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:09:01,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 20:09:01,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81045267] [2022-03-03 20:09:01,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:09:01,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 20:09:01,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:01,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 20:09:01,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 20:09:01,632 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 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 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2022-03-03 20:09:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:01,692 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2022-03-03 20:09:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 20:09:01,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 20:09:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:01,701 INFO L225 Difference]: With dead ends: 43 [2022-03-03 20:09:01,701 INFO L226 Difference]: Without dead ends: 43 [2022-03-03 20:09:01,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:09:01,704 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:01,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:09:01,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-03 20:09:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-03-03 20:09:01,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:01,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2022-03-03 20:09:01,732 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2022-03-03 20:09:01,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:01,732 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2022-03-03 20:09:01,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2022-03-03 20:09:01,732 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2022-03-03 20:09:01,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 20:09:01,752 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:01,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:01,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 20:09:01,761 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:09:01,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:01,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1950061855, now seen corresponding path program 1 times [2022-03-03 20:09:01,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:01,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065544962] [2022-03-03 20:09:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:01,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:09:01,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:01,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065544962] [2022-03-03 20:09:01,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065544962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:09:01,819 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:09:01,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 20:09:01,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334809621] [2022-03-03 20:09:01,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:09:01,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 20:09:01,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:01,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 20:09:01,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:09:01,822 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:01,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:01,879 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2022-03-03 20:09:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 20:09:01,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 20:09:01,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:01,883 INFO L225 Difference]: With dead ends: 50 [2022-03-03 20:09:01,883 INFO L226 Difference]: Without dead ends: 50 [2022-03-03 20:09:01,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 20:09:01,888 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:01,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 27 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:09:01,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-03 20:09:01,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-03-03 20:09:01,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2022-03-03 20:09:01,894 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2022-03-03 20:09:01,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:01,895 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2022-03-03 20:09:01,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2022-03-03 20:09:01,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 20:09:01,895 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:01,896 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:01,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 20:09:01,896 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:09:01,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:01,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1007893021, now seen corresponding path program 1 times [2022-03-03 20:09:01,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:01,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775947252] [2022-03-03 20:09:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:01,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:02,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:02,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775947252] [2022-03-03 20:09:02,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775947252] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:02,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718882751] [2022-03-03 20:09:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:02,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:02,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:02,068 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:02,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 20:09:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:02,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 20:09:02,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:02,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:02,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718882751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:02,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:02,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-03 20:09:02,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606274921] [2022-03-03 20:09:02,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:02,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:09:02,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:02,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:09:02,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:09:02,818 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:02,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:02,976 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2022-03-03 20:09:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 20:09:02,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 20:09:02,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:02,978 INFO L225 Difference]: With dead ends: 144 [2022-03-03 20:09:02,978 INFO L226 Difference]: Without dead ends: 113 [2022-03-03 20:09:02,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:09:02,979 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:02,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 113 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:09:02,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-03 20:09:02,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 55. [2022-03-03 20:09:02,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:02,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2022-03-03 20:09:02,984 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2022-03-03 20:09:02,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:02,984 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2022-03-03 20:09:02,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:02,985 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2022-03-03 20:09:02,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 20:09:02,985 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:02,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:03,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:03,209 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 [2022-03-03 20:09:03,210 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:09:03,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:03,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1821743003, now seen corresponding path program 2 times [2022-03-03 20:09:03,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:03,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019550615] [2022-03-03 20:09:03,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:03,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:03,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:03,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019550615] [2022-03-03 20:09:03,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019550615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:03,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409358107] [2022-03-03 20:09:03,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:09:03,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:03,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:03,282 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:03,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 20:09:03,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:09:03,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:03,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:09:03,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:03,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:03,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409358107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:03,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:03,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-03 20:09:03,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281035174] [2022-03-03 20:09:03,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:03,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:09:03,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:03,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:09:03,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:09:03,530 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:03,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:03,853 INFO L93 Difference]: Finished difference Result 177 states and 328 transitions. [2022-03-03 20:09:03,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 20:09:03,853 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 20:09:03,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:03,854 INFO L225 Difference]: With dead ends: 177 [2022-03-03 20:09:03,854 INFO L226 Difference]: Without dead ends: 177 [2022-03-03 20:09:03,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 20:09:03,855 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 175 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:03,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 81 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:09:03,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-03 20:09:03,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 75. [2022-03-03 20:09:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2022-03-03 20:09:03,871 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 21 [2022-03-03 20:09:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:03,872 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2022-03-03 20:09:03,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:03,872 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2022-03-03 20:09:03,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 20:09:03,873 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:03,873 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:03,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-03 20:09:04,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-03 20:09:04,082 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:09:04,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:04,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2071555341, now seen corresponding path program 3 times [2022-03-03 20:09:04,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:04,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731136667] [2022-03-03 20:09:04,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:04,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:04,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:04,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731136667] [2022-03-03 20:09:04,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731136667] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:04,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963081814] [2022-03-03 20:09:04,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:09:04,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:04,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:04,140 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:04,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 20:09:04,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:09:04,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:04,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:09:04,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:04,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:04,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963081814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:04,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:04,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-03 20:09:04,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162664219] [2022-03-03 20:09:04,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:04,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:09:04,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:04,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:09:04,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:09:04,343 INFO L87 Difference]: Start difference. First operand 75 states and 149 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:04,587 INFO L93 Difference]: Finished difference Result 141 states and 267 transitions. [2022-03-03 20:09:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 20:09:04,588 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 20:09:04,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:04,589 INFO L225 Difference]: With dead ends: 141 [2022-03-03 20:09:04,590 INFO L226 Difference]: Without dead ends: 139 [2022-03-03 20:09:04,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-03-03 20:09:04,591 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 132 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:04,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 40 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:09:04,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-03 20:09:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 77. [2022-03-03 20:09:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2022-03-03 20:09:04,596 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 21 [2022-03-03 20:09:04,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:04,596 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2022-03-03 20:09:04,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2022-03-03 20:09:04,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:09:04,597 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:04,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:04,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:04,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:04,812 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:09:04,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:04,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1720260825, now seen corresponding path program 4 times [2022-03-03 20:09:04,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:04,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127379015] [2022-03-03 20:09:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:04,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:04,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:04,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127379015] [2022-03-03 20:09:04,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127379015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:04,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735959334] [2022-03-03 20:09:04,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:09:04,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:04,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:04,980 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:05,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 20:09:05,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:09:05,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:05,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 20:09:05,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:05,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:05,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735959334] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:05,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:05,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-03-03 20:09:05,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667079746] [2022-03-03 20:09:05,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:05,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:09:05,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:05,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:09:05,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:09:05,710 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:06,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:06,485 INFO L93 Difference]: Finished difference Result 375 states and 737 transitions. [2022-03-03 20:09:06,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 20:09:06,486 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:09:06,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:06,487 INFO L225 Difference]: With dead ends: 375 [2022-03-03 20:09:06,487 INFO L226 Difference]: Without dead ends: 361 [2022-03-03 20:09:06,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=570, Invalid=1592, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 20:09:06,489 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 231 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:06,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 230 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 501 Invalid, 0 Unknown, 277 Unchecked, 0.2s Time] [2022-03-03 20:09:06,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-03-03 20:09:06,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 164. [2022-03-03 20:09:06,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.184049079754601) internal successors, (356), 163 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:06,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 356 transitions. [2022-03-03 20:09:06,497 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 356 transitions. Word has length 23 [2022-03-03 20:09:06,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:06,497 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 356 transitions. [2022-03-03 20:09:06,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:06,497 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 356 transitions. [2022-03-03 20:09:06,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:09:06,498 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:06,498 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:06,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:06,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:06,710 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:09:06,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:06,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1505995819, now seen corresponding path program 5 times [2022-03-03 20:09:06,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:06,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613198380] [2022-03-03 20:09:06,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:06,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:06,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:06,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613198380] [2022-03-03 20:09:06,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613198380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:06,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028322842] [2022-03-03 20:09:06,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:09:06,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:06,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:06,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:06,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 20:09:06,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:09:06,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:06,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 20:09:06,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:07,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:07,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028322842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:07,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:07,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-03-03 20:09:07,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688989374] [2022-03-03 20:09:07,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:07,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:09:07,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:07,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:09:07,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:09:07,867 INFO L87 Difference]: Start difference. First operand 164 states and 356 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:09,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:09,723 INFO L93 Difference]: Finished difference Result 646 states and 1281 transitions. [2022-03-03 20:09:09,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 20:09:09,723 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:09:09,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:09,726 INFO L225 Difference]: With dead ends: 646 [2022-03-03 20:09:09,726 INFO L226 Difference]: Without dead ends: 591 [2022-03-03 20:09:09,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1042, Invalid=4070, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 20:09:09,728 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 396 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:09,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 236 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 718 Invalid, 0 Unknown, 222 Unchecked, 0.4s Time] [2022-03-03 20:09:09,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-03-03 20:09:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 206. [2022-03-03 20:09:09,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.229268292682927) internal successors, (457), 205 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 457 transitions. [2022-03-03 20:09:09,738 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 457 transitions. Word has length 23 [2022-03-03 20:09:09,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:09,738 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 457 transitions. [2022-03-03 20:09:09,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 457 transitions. [2022-03-03 20:09:09,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:09:09,739 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:09,739 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:09,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:09,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:09,959 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:09:09,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:09,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1378998987, now seen corresponding path program 6 times [2022-03-03 20:09:09,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:09,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114713583] [2022-03-03 20:09:09,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:09,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:10,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:10,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114713583] [2022-03-03 20:09:10,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114713583] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:10,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147376171] [2022-03-03 20:09:10,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:09:10,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:10,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:10,144 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:10,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 20:09:10,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:09:10,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:10,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 20:09:10,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:10,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:11,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147376171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:11,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:11,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-03-03 20:09:11,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121122352] [2022-03-03 20:09:11,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:11,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:09:11,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:11,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:09:11,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:09:11,215 INFO L87 Difference]: Start difference. First operand 206 states and 457 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:14,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:14,165 INFO L93 Difference]: Finished difference Result 782 states and 1564 transitions. [2022-03-03 20:09:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 20:09:14,166 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:09:14,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:14,168 INFO L225 Difference]: With dead ends: 782 [2022-03-03 20:09:14,168 INFO L226 Difference]: Without dead ends: 715 [2022-03-03 20:09:14,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3029 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1765, Invalid=6607, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 20:09:14,171 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 497 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:14,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 225 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 771 Invalid, 0 Unknown, 198 Unchecked, 0.4s Time] [2022-03-03 20:09:14,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-03-03 20:09:14,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 213. [2022-03-03 20:09:14,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2216981132075473) internal successors, (471), 212 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 471 transitions. [2022-03-03 20:09:14,179 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 471 transitions. Word has length 23 [2022-03-03 20:09:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:14,179 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 471 transitions. [2022-03-03 20:09:14,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:14,179 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 471 transitions. [2022-03-03 20:09:14,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:09:14,180 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:14,180 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:14,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:14,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:14,397 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:09:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:14,397 INFO L85 PathProgramCache]: Analyzing trace with hash 7492009, now seen corresponding path program 7 times [2022-03-03 20:09:14,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:14,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883633111] [2022-03-03 20:09:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:14,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:14,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:14,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883633111] [2022-03-03 20:09:14,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883633111] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:14,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705169421] [2022-03-03 20:09:14,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:09:14,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:14,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:14,516 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:14,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 20:09:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:14,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 20:09:14,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:14,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:15,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705169421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:15,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:15,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-03-03 20:09:15,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151893943] [2022-03-03 20:09:15,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:15,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:09:15,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:15,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:09:15,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:09:15,003 INFO L87 Difference]: Start difference. First operand 213 states and 471 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:15,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:15,998 INFO L93 Difference]: Finished difference Result 713 states and 1422 transitions. [2022-03-03 20:09:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 20:09:15,998 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:09:15,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:16,000 INFO L225 Difference]: With dead ends: 713 [2022-03-03 20:09:16,001 INFO L226 Difference]: Without dead ends: 686 [2022-03-03 20:09:16,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=979, Invalid=2561, Unknown=0, NotChecked=0, Total=3540 [2022-03-03 20:09:16,002 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 431 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:16,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 142 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:09:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-03-03 20:09:16,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 301. [2022-03-03 20:09:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.3066666666666666) internal successors, (692), 300 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:16,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 692 transitions. [2022-03-03 20:09:16,011 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 692 transitions. Word has length 23 [2022-03-03 20:09:16,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:16,011 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 692 transitions. [2022-03-03 20:09:16,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:16,012 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 692 transitions. [2022-03-03 20:09:16,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:09:16,014 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:16,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:16,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:16,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:16,230 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:09:16,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:16,231 INFO L85 PathProgramCache]: Analyzing trace with hash 256165081, now seen corresponding path program 8 times [2022-03-03 20:09:16,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:16,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740913151] [2022-03-03 20:09:16,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:16,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:16,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:16,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740913151] [2022-03-03 20:09:16,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740913151] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:16,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844118749] [2022-03-03 20:09:16,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:09:16,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:16,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:16,311 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:16,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 20:09:16,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:09:16,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:16,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 20:09:16,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:16,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:16,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844118749] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:16,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:16,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-03 20:09:16,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33306594] [2022-03-03 20:09:16,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:16,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:09:16,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:16,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:09:16,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:09:16,685 INFO L87 Difference]: Start difference. First operand 301 states and 692 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:17,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:17,075 INFO L93 Difference]: Finished difference Result 524 states and 1132 transitions. [2022-03-03 20:09:17,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 20:09:17,075 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:09:17,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:17,077 INFO L225 Difference]: With dead ends: 524 [2022-03-03 20:09:17,078 INFO L226 Difference]: Without dead ends: 520 [2022-03-03 20:09:17,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 20:09:17,079 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 160 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:17,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 86 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:09:17,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-03 20:09:17,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 343. [2022-03-03 20:09:17,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.324561403508772) internal successors, (795), 342 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 795 transitions. [2022-03-03 20:09:17,089 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 795 transitions. Word has length 23 [2022-03-03 20:09:17,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:17,089 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 795 transitions. [2022-03-03 20:09:17,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:17,090 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 795 transitions. [2022-03-03 20:09:17,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:09:17,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:17,091 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:17,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:17,307 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,SelfDestructingSolverStorable9 [2022-03-03 20:09:17,308 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:09:17,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:17,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1482502569, now seen corresponding path program 9 times [2022-03-03 20:09:17,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:17,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416473875] [2022-03-03 20:09:17,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:17,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:17,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:17,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416473875] [2022-03-03 20:09:17,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416473875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:17,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344295848] [2022-03-03 20:09:17,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:09:17,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:17,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:17,396 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:17,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 20:09:17,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:09:17,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:17,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 20:09:17,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:17,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:17,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344295848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:17,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:17,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 23 [2022-03-03 20:09:17,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671028155] [2022-03-03 20:09:17,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:17,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:09:17,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:17,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:09:17,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:09:17,735 INFO L87 Difference]: Start difference. First operand 343 states and 795 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:18,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:18,388 INFO L93 Difference]: Finished difference Result 809 states and 1674 transitions. [2022-03-03 20:09:18,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 20:09:18,388 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:09:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:18,391 INFO L225 Difference]: With dead ends: 809 [2022-03-03 20:09:18,391 INFO L226 Difference]: Without dead ends: 809 [2022-03-03 20:09:18,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=782, Invalid=2298, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 20:09:18,393 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 252 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:18,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 139 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:09:18,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-03-03 20:09:18,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 335. [2022-03-03 20:09:18,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.338323353293413) internal successors, (781), 334 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 781 transitions. [2022-03-03 20:09:18,401 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 781 transitions. Word has length 25 [2022-03-03 20:09:18,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:18,402 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 781 transitions. [2022-03-03 20:09:18,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:18,402 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 781 transitions. [2022-03-03 20:09:18,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:09:18,403 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:18,403 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:18,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:18,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:18,617 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:09:18,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:18,618 INFO L85 PathProgramCache]: Analyzing trace with hash -781200115, now seen corresponding path program 10 times [2022-03-03 20:09:18,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:18,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611480569] [2022-03-03 20:09:18,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:18,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:18,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:18,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611480569] [2022-03-03 20:09:18,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611480569] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:18,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664898099] [2022-03-03 20:09:18,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:09:18,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:18,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:18,675 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:18,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 20:09:18,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:09:18,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:18,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 20:09:18,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:18,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:19,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664898099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:19,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:19,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2022-03-03 20:09:19,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181566690] [2022-03-03 20:09:19,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:19,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 20:09:19,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:19,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 20:09:19,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2022-03-03 20:09:19,008 INFO L87 Difference]: Start difference. First operand 335 states and 781 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:19,600 INFO L93 Difference]: Finished difference Result 532 states and 1139 transitions. [2022-03-03 20:09:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 20:09:19,601 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:09:19,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:19,604 INFO L225 Difference]: With dead ends: 532 [2022-03-03 20:09:19,604 INFO L226 Difference]: Without dead ends: 528 [2022-03-03 20:09:19,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=847, Invalid=2015, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 20:09:19,605 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 189 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:19,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 67 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:09:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-03-03 20:09:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 330. [2022-03-03 20:09:19,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.3221884498480243) internal successors, (764), 329 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:19,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 764 transitions. [2022-03-03 20:09:19,612 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 764 transitions. Word has length 25 [2022-03-03 20:09:19,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:19,612 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 764 transitions. [2022-03-03 20:09:19,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:19,612 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 764 transitions. [2022-03-03 20:09:19,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 20:09:19,613 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:19,613 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:19,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:19,827 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,SelfDestructingSolverStorable11 [2022-03-03 20:09:19,827 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:09:19,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:19,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1518663275, now seen corresponding path program 11 times [2022-03-03 20:09:19,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:19,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768293077] [2022-03-03 20:09:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:19,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:19,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:19,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768293077] [2022-03-03 20:09:19,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768293077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:19,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608362276] [2022-03-03 20:09:19,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:09:19,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:19,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:19,994 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:19,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 20:09:20,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 20:09:20,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:20,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 20:09:20,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:20,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:20,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608362276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:20,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:20,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-03-03 20:09:20,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105972706] [2022-03-03 20:09:20,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:20,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:09:20,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:20,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:09:20,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:09:20,815 INFO L87 Difference]: Start difference. First operand 330 states and 764 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:22,596 INFO L93 Difference]: Finished difference Result 1062 states and 2277 transitions. [2022-03-03 20:09:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 20:09:22,597 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 20:09:22,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:22,599 INFO L225 Difference]: With dead ends: 1062 [2022-03-03 20:09:22,600 INFO L226 Difference]: Without dead ends: 940 [2022-03-03 20:09:22,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=839, Invalid=3717, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 20:09:22,601 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 536 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:22,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 278 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:09:22,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-03-03 20:09:22,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 434. [2022-03-03 20:09:22,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.33256351039261) internal successors, (1010), 433 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:22,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1010 transitions. [2022-03-03 20:09:22,613 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1010 transitions. Word has length 27 [2022-03-03 20:09:22,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:22,613 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1010 transitions. [2022-03-03 20:09:22,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:22,613 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1010 transitions. [2022-03-03 20:09:22,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 20:09:22,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:22,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:22,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:22,823 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,SelfDestructingSolverStorable12 [2022-03-03 20:09:22,823 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:09:22,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:22,824 INFO L85 PathProgramCache]: Analyzing trace with hash 2127718247, now seen corresponding path program 12 times [2022-03-03 20:09:22,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:22,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659578277] [2022-03-03 20:09:22,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:22,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:23,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:23,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659578277] [2022-03-03 20:09:23,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659578277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:23,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605959994] [2022-03-03 20:09:23,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:09:23,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:23,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:23,017 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:23,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 20:09:23,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:09:23,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:23,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:09:23,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:23,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:24,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605959994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:24,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:24,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 35 [2022-03-03 20:09:24,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175566572] [2022-03-03 20:09:24,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:24,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 20:09:24,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 20:09:24,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 20:09:24,387 INFO L87 Difference]: Start difference. First operand 434 states and 1010 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:40,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:40,727 INFO L93 Difference]: Finished difference Result 2209 states and 4746 transitions. [2022-03-03 20:09:40,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-03-03 20:09:40,728 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 20:09:40,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:40,733 INFO L225 Difference]: With dead ends: 2209 [2022-03-03 20:09:40,734 INFO L226 Difference]: Without dead ends: 2042 [2022-03-03 20:09:40,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 15488 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=6410, Invalid=29880, Unknown=0, NotChecked=0, Total=36290 [2022-03-03 20:09:40,738 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 668 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:40,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 450 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1404 Invalid, 0 Unknown, 528 Unchecked, 0.8s Time] [2022-03-03 20:09:40,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2022-03-03 20:09:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 613. [2022-03-03 20:09:40,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 2.3562091503267975) internal successors, (1442), 612 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:40,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1442 transitions. [2022-03-03 20:09:40,756 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1442 transitions. Word has length 27 [2022-03-03 20:09:40,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:40,756 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 1442 transitions. [2022-03-03 20:09:40,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:40,757 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1442 transitions. [2022-03-03 20:09:40,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 20:09:40,758 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:40,758 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:40,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:40,974 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,SelfDestructingSolverStorable13 [2022-03-03 20:09:40,975 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:09:40,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:40,975 INFO L85 PathProgramCache]: Analyzing trace with hash 866515745, now seen corresponding path program 13 times [2022-03-03 20:09:40,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:40,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106920032] [2022-03-03 20:09:40,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:40,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:41,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:41,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106920032] [2022-03-03 20:09:41,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106920032] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:41,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094636578] [2022-03-03 20:09:41,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:09:41,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:41,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:41,190 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:41,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 20:09:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:41,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:09:41,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:41,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:42,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094636578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:42,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:42,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 35 [2022-03-03 20:09:42,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98634925] [2022-03-03 20:09:42,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:42,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 20:09:42,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:42,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 20:09:42,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 20:09:42,507 INFO L87 Difference]: Start difference. First operand 613 states and 1442 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:53,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:53,348 INFO L93 Difference]: Finished difference Result 2366 states and 5234 transitions. [2022-03-03 20:09:53,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-03-03 20:09:53,349 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 20:09:53,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:53,358 INFO L225 Difference]: With dead ends: 2366 [2022-03-03 20:09:53,358 INFO L226 Difference]: Without dead ends: 2268 [2022-03-03 20:09:53,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 38 SyntacticMatches, 15 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 10932 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=4841, Invalid=19339, Unknown=0, NotChecked=0, Total=24180 [2022-03-03 20:09:53,360 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 648 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 600 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:53,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 252 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1014 Invalid, 0 Unknown, 600 Unchecked, 0.6s Time] [2022-03-03 20:09:53,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-03-03 20:09:53,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 748. [2022-03-03 20:09:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.3842034805890227) internal successors, (1781), 747 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1781 transitions. [2022-03-03 20:09:53,384 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1781 transitions. Word has length 27 [2022-03-03 20:09:53,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:53,384 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1781 transitions. [2022-03-03 20:09:53,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:53,385 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1781 transitions. [2022-03-03 20:09:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 20:09:53,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:53,386 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:53,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:53,602 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,SelfDestructingSolverStorable14 [2022-03-03 20:09:53,602 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:09:53,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:53,603 INFO L85 PathProgramCache]: Analyzing trace with hash 597124453, now seen corresponding path program 14 times [2022-03-03 20:09:53,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:53,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227891591] [2022-03-03 20:09:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:53,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:53,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:53,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227891591] [2022-03-03 20:09:53,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227891591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:53,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889506394] [2022-03-03 20:09:53,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:09:53,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:53,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:53,742 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:53,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 20:09:53,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:09:53,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:53,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 20:09:53,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:54,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:54,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889506394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:54,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:54,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-03-03 20:09:54,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071956336] [2022-03-03 20:09:54,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:54,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 20:09:54,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:54,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 20:09:54,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-03-03 20:09:54,462 INFO L87 Difference]: Start difference. First operand 748 states and 1781 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:57,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:09:57,026 INFO L93 Difference]: Finished difference Result 2069 states and 4597 transitions. [2022-03-03 20:09:57,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 20:09:57,027 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 20:09:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:09:57,033 INFO L225 Difference]: With dead ends: 2069 [2022-03-03 20:09:57,033 INFO L226 Difference]: Without dead ends: 2060 [2022-03-03 20:09:57,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2367, Invalid=7533, Unknown=0, NotChecked=0, Total=9900 [2022-03-03 20:09:57,035 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 538 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:09:57,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 235 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:09:57,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-03-03 20:09:57,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1128. [2022-03-03 20:09:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 2.3895297249334515) internal successors, (2693), 1127 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:57,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 2693 transitions. [2022-03-03 20:09:57,062 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 2693 transitions. Word has length 27 [2022-03-03 20:09:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:09:57,062 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 2693 transitions. [2022-03-03 20:09:57,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:09:57,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 2693 transitions. [2022-03-03 20:09:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 20:09:57,064 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:09:57,064 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:09:57,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 20:09:57,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:57,275 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:09:57,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:09:57,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2036570091, now seen corresponding path program 15 times [2022-03-03 20:09:57,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:09:57,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773288495] [2022-03-03 20:09:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:09:57,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:09:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:09:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:57,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:09:57,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773288495] [2022-03-03 20:09:57,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773288495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:09:57,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407675829] [2022-03-03 20:09:57,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:09:57,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:09:57,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:09:57,454 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:09:57,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 20:09:57,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:09:57,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:09:57,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:09:57,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:09:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:58,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:09:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:09:58,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407675829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:09:58,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:09:58,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-03-03 20:09:58,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863443994] [2022-03-03 20:09:58,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:09:58,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 20:09:58,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:09:58,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 20:09:58,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 20:09:58,711 INFO L87 Difference]: Start difference. First operand 1128 states and 2693 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:05,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:05,063 INFO L93 Difference]: Finished difference Result 3134 states and 6922 transitions. [2022-03-03 20:10:05,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-03 20:10:05,064 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 20:10:05,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:05,072 INFO L225 Difference]: With dead ends: 3134 [2022-03-03 20:10:05,073 INFO L226 Difference]: Without dead ends: 2988 [2022-03-03 20:10:05,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10101 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3863, Invalid=21577, Unknown=0, NotChecked=0, Total=25440 [2022-03-03 20:10:05,074 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 896 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:05,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 481 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1740 Invalid, 0 Unknown, 352 Unchecked, 0.8s Time] [2022-03-03 20:10:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2022-03-03 20:10:05,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 1372. [2022-03-03 20:10:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 2.4033552151714077) internal successors, (3295), 1371 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 3295 transitions. [2022-03-03 20:10:05,108 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 3295 transitions. Word has length 27 [2022-03-03 20:10:05,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:05,108 INFO L470 AbstractCegarLoop]: Abstraction has 1372 states and 3295 transitions. [2022-03-03 20:10:05,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:05,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 3295 transitions. [2022-03-03 20:10:05,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 20:10:05,111 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:05,111 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:10:05,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:05,327 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,SelfDestructingSolverStorable16 [2022-03-03 20:10:05,327 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:10:05,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:05,328 INFO L85 PathProgramCache]: Analyzing trace with hash 201920533, now seen corresponding path program 16 times [2022-03-03 20:10:05,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:05,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666784058] [2022-03-03 20:10:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:05,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:05,409 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:05,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666784058] [2022-03-03 20:10:05,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666784058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:05,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648058051] [2022-03-03 20:10:05,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:10:05,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:05,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:05,411 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:10:05,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 20:10:05,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:10:05,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:05,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 20:10:05,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:05,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:06,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648058051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:06,193 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:06,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 27 [2022-03-03 20:10:06,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767451874] [2022-03-03 20:10:06,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:06,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:10:06,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:06,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:10:06,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:10:06,194 INFO L87 Difference]: Start difference. First operand 1372 states and 3295 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:07,350 INFO L93 Difference]: Finished difference Result 2372 states and 5544 transitions. [2022-03-03 20:10:07,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 20:10:07,351 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 20:10:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:07,358 INFO L225 Difference]: With dead ends: 2372 [2022-03-03 20:10:07,358 INFO L226 Difference]: Without dead ends: 2358 [2022-03-03 20:10:07,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1404, Invalid=3852, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 20:10:07,359 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 367 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:07,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 117 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:10:07,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2022-03-03 20:10:07,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1471. [2022-03-03 20:10:07,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.4224489795918367) internal successors, (3561), 1470 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3561 transitions. [2022-03-03 20:10:07,394 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3561 transitions. Word has length 27 [2022-03-03 20:10:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:07,394 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 3561 transitions. [2022-03-03 20:10:07,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:07,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3561 transitions. [2022-03-03 20:10:07,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 20:10:07,396 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:07,396 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:10:07,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:07,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-03 20:10:07,611 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:10:07,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:07,612 INFO L85 PathProgramCache]: Analyzing trace with hash 167708947, now seen corresponding path program 17 times [2022-03-03 20:10:07,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:07,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265142277] [2022-03-03 20:10:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:07,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:07,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:07,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265142277] [2022-03-03 20:10:07,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265142277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:07,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939181190] [2022-03-03 20:10:07,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:10:07,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:07,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:07,697 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:10:07,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 20:10:07,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 20:10:07,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:07,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 20:10:07,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:08,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:08,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939181190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:08,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:08,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 30 [2022-03-03 20:10:08,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641200641] [2022-03-03 20:10:08,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:08,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 20:10:08,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:08,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 20:10:08,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-03-03 20:10:08,286 INFO L87 Difference]: Start difference. First operand 1471 states and 3561 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:09,301 INFO L93 Difference]: Finished difference Result 2313 states and 5246 transitions. [2022-03-03 20:10:09,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:10:09,302 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 20:10:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:09,308 INFO L225 Difference]: With dead ends: 2313 [2022-03-03 20:10:09,308 INFO L226 Difference]: Without dead ends: 2265 [2022-03-03 20:10:09,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1458, Invalid=4704, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 20:10:09,309 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 487 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:09,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 132 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:10:09,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2022-03-03 20:10:09,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1356. [2022-03-03 20:10:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 2.429520295202952) internal successors, (3292), 1355 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:09,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 3292 transitions. [2022-03-03 20:10:09,331 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 3292 transitions. Word has length 29 [2022-03-03 20:10:09,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:09,331 INFO L470 AbstractCegarLoop]: Abstraction has 1356 states and 3292 transitions. [2022-03-03 20:10:09,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:09,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 3292 transitions. [2022-03-03 20:10:09,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 20:10:09,333 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:09,333 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:10:09,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:09,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:09,540 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:10:09,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:09,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1561014771, now seen corresponding path program 18 times [2022-03-03 20:10:09,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:09,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8653109] [2022-03-03 20:10:09,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:09,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:09,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:09,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8653109] [2022-03-03 20:10:09,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8653109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:09,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506065114] [2022-03-03 20:10:09,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:10:09,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:09,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:09,599 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:10:09,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 20:10:09,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-03 20:10:09,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:09,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 20:10:09,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:09,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:10,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506065114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:10,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:10,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 26 [2022-03-03 20:10:10,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703716873] [2022-03-03 20:10:10,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:10,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:10:10,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:10,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:10:10,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:10:10,057 INFO L87 Difference]: Start difference. First operand 1356 states and 3292 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:11,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:11,015 INFO L93 Difference]: Finished difference Result 1686 states and 3919 transitions. [2022-03-03 20:10:11,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 20:10:11,016 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 20:10:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:11,025 INFO L225 Difference]: With dead ends: 1686 [2022-03-03 20:10:11,025 INFO L226 Difference]: Without dead ends: 1682 [2022-03-03 20:10:11,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1559, Invalid=3991, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 20:10:11,026 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 229 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:11,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 100 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:10:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-03-03 20:10:11,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1318. [2022-03-03 20:10:11,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 2.4229309035687168) internal successors, (3191), 1317 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:11,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3191 transitions. [2022-03-03 20:10:11,049 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3191 transitions. Word has length 29 [2022-03-03 20:10:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:11,049 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 3191 transitions. [2022-03-03 20:10:11,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:11,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3191 transitions. [2022-03-03 20:10:11,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 20:10:11,051 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:11,051 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:10:11,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:11,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:11,271 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:10:11,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:11,272 INFO L85 PathProgramCache]: Analyzing trace with hash -634106839, now seen corresponding path program 19 times [2022-03-03 20:10:11,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:11,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095782806] [2022-03-03 20:10:11,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:11,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:10:11,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:11,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095782806] [2022-03-03 20:10:11,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095782806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:11,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323073403] [2022-03-03 20:10:11,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:10:11,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:11,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:11,382 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:10:11,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 20:10:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:11,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 20:10:11,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:10:11,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:12,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323073403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:12,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:12,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 28 [2022-03-03 20:10:12,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502407663] [2022-03-03 20:10:12,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:12,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 20:10:12,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:12,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 20:10:12,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-03-03 20:10:12,380 INFO L87 Difference]: Start difference. First operand 1318 states and 3191 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:15,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:15,183 INFO L93 Difference]: Finished difference Result 2767 states and 6117 transitions. [2022-03-03 20:10:15,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-03 20:10:15,184 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 20:10:15,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:15,188 INFO L225 Difference]: With dead ends: 2767 [2022-03-03 20:10:15,188 INFO L226 Difference]: Without dead ends: 2752 [2022-03-03 20:10:15,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4065 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2616, Invalid=8304, Unknown=0, NotChecked=0, Total=10920 [2022-03-03 20:10:15,190 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 440 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:15,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 244 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:10:15,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2022-03-03 20:10:15,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 1421. [2022-03-03 20:10:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 2.37887323943662) internal successors, (3378), 1420 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 3378 transitions. [2022-03-03 20:10:15,214 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 3378 transitions. Word has length 29 [2022-03-03 20:10:15,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:15,214 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 3378 transitions. [2022-03-03 20:10:15,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:15,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 3378 transitions. [2022-03-03 20:10:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 20:10:15,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:15,217 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:10:15,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:15,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:15,431 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:10:15,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:15,432 INFO L85 PathProgramCache]: Analyzing trace with hash -870593497, now seen corresponding path program 20 times [2022-03-03 20:10:15,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:15,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163542620] [2022-03-03 20:10:15,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:15,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:15,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:15,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163542620] [2022-03-03 20:10:15,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163542620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:15,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605602154] [2022-03-03 20:10:15,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:10:15,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:15,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:15,635 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:10:15,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 20:10:15,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:10:15,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:15,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:10:15,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:16,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:17,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605602154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:17,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:17,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 37 [2022-03-03 20:10:17,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125387562] [2022-03-03 20:10:17,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:17,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 20:10:17,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:17,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 20:10:17,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1067, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 20:10:17,351 INFO L87 Difference]: Start difference. First operand 1421 states and 3378 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:23,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:23,312 INFO L93 Difference]: Finished difference Result 2866 states and 6426 transitions. [2022-03-03 20:10:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-03 20:10:23,312 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 20:10:23,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:23,317 INFO L225 Difference]: With dead ends: 2866 [2022-03-03 20:10:23,317 INFO L226 Difference]: Without dead ends: 2794 [2022-03-03 20:10:23,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4993 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2991, Invalid=10349, Unknown=0, NotChecked=0, Total=13340 [2022-03-03 20:10:23,318 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 554 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:23,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 410 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1561 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:10:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2022-03-03 20:10:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 1543. [2022-03-03 20:10:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1542 states have (on average 2.3605706874189365) internal successors, (3640), 1542 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:23,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 3640 transitions. [2022-03-03 20:10:23,345 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 3640 transitions. Word has length 29 [2022-03-03 20:10:23,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:23,345 INFO L470 AbstractCegarLoop]: Abstraction has 1543 states and 3640 transitions. [2022-03-03 20:10:23,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:23,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 3640 transitions. [2022-03-03 20:10:23,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 20:10:23,348 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:23,348 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:10:23,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:23,563 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,SelfDestructingSolverStorable21 [2022-03-03 20:10:23,563 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:10:23,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:23,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1331432529, now seen corresponding path program 21 times [2022-03-03 20:10:23,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:23,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239360086] [2022-03-03 20:10:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:23,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:23,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:23,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239360086] [2022-03-03 20:10:23,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239360086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:23,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985510264] [2022-03-03 20:10:23,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:10:23,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:23,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:23,772 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:10:23,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 20:10:23,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 20:10:23,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:23,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 20:10:23,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:24,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:24,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985510264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:24,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:24,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-03 20:10:24,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412628855] [2022-03-03 20:10:24,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:24,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 20:10:24,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:24,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 20:10:24,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1239, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 20:10:24,926 INFO L87 Difference]: Start difference. First operand 1543 states and 3640 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:30,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:30,781 INFO L93 Difference]: Finished difference Result 3195 states and 7142 transitions. [2022-03-03 20:10:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-03 20:10:30,781 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 20:10:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:30,797 INFO L225 Difference]: With dead ends: 3195 [2022-03-03 20:10:30,797 INFO L226 Difference]: Without dead ends: 3182 [2022-03-03 20:10:30,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8119 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3862, Invalid=17308, Unknown=0, NotChecked=0, Total=21170 [2022-03-03 20:10:30,799 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 588 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 541 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:30,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 307 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1322 Invalid, 0 Unknown, 541 Unchecked, 0.7s Time] [2022-03-03 20:10:30,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2022-03-03 20:10:30,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 1828. [2022-03-03 20:10:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 2.3787629994526545) internal successors, (4346), 1827 states have internal predecessors, (4346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 4346 transitions. [2022-03-03 20:10:30,840 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 4346 transitions. Word has length 31 [2022-03-03 20:10:30,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:30,840 INFO L470 AbstractCegarLoop]: Abstraction has 1828 states and 4346 transitions. [2022-03-03 20:10:30,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:30,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 4346 transitions. [2022-03-03 20:10:30,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 20:10:30,845 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:30,845 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:10:30,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:31,059 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,SelfDestructingSolverStorable22 [2022-03-03 20:10:31,059 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:10:31,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:31,060 INFO L85 PathProgramCache]: Analyzing trace with hash -87583581, now seen corresponding path program 22 times [2022-03-03 20:10:31,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:31,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724049936] [2022-03-03 20:10:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:31,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:31,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:31,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724049936] [2022-03-03 20:10:31,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724049936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:31,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266781698] [2022-03-03 20:10:31,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:10:31,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:31,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:31,277 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:10:31,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 20:10:31,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:10:31,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:31,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 20:10:31,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:31,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:33,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266781698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:33,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:33,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 41 [2022-03-03 20:10:33,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031441169] [2022-03-03 20:10:33,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:33,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 20:10:33,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:33,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 20:10:33,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 20:10:33,169 INFO L87 Difference]: Start difference. First operand 1828 states and 4346 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:51,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:10:51,355 INFO L93 Difference]: Finished difference Result 4237 states and 9400 transitions. [2022-03-03 20:10:51,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-03-03 20:10:51,355 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 20:10:51,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:10:51,362 INFO L225 Difference]: With dead ends: 4237 [2022-03-03 20:10:51,362 INFO L226 Difference]: Without dead ends: 4083 [2022-03-03 20:10:51,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 42 SyntacticMatches, 23 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 18335 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=5852, Invalid=33154, Unknown=0, NotChecked=0, Total=39006 [2022-03-03 20:10:51,364 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 874 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 2366 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 2366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:10:51,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 693 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 2366 Invalid, 0 Unknown, 208 Unchecked, 1.2s Time] [2022-03-03 20:10:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4083 states. [2022-03-03 20:10:51,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4083 to 2081. [2022-03-03 20:10:51,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 2.3653846153846154) internal successors, (4920), 2080 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 4920 transitions. [2022-03-03 20:10:51,402 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 4920 transitions. Word has length 31 [2022-03-03 20:10:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:10:51,402 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 4920 transitions. [2022-03-03 20:10:51,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:10:51,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 4920 transitions. [2022-03-03 20:10:51,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 20:10:51,406 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:10:51,406 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:10:51,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 20:10:51,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:51,619 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:10:51,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:10:51,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1093246803, now seen corresponding path program 23 times [2022-03-03 20:10:51,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:10:51,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611235951] [2022-03-03 20:10:51,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:10:51,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:10:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:10:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:51,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:10:51,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611235951] [2022-03-03 20:10:51,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611235951] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:10:51,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882245654] [2022-03-03 20:10:51,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:10:51,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:10:51,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:10:51,847 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:10:51,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 20:10:51,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 20:10:51,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:10:51,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 20:10:51,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:10:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:52,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:10:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:10:53,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882245654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:10:53,852 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:10:53,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 41 [2022-03-03 20:10:53,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492858780] [2022-03-03 20:10:53,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:10:53,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 20:10:53,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:10:53,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 20:10:53,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1344, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 20:10:53,853 INFO L87 Difference]: Start difference. First operand 2081 states and 4920 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:11,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:11:11,988 INFO L93 Difference]: Finished difference Result 4464 states and 9835 transitions. [2022-03-03 20:11:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-03-03 20:11:11,988 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 20:11:11,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:11:12,014 INFO L225 Difference]: With dead ends: 4464 [2022-03-03 20:11:12,014 INFO L226 Difference]: Without dead ends: 4313 [2022-03-03 20:11:12,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 47 SyntacticMatches, 24 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 15729 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=5838, Invalid=28944, Unknown=0, NotChecked=0, Total=34782 [2022-03-03 20:11:12,016 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 885 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 2205 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:11:12,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 406 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2205 Invalid, 0 Unknown, 124 Unchecked, 1.2s Time] [2022-03-03 20:11:12,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2022-03-03 20:11:12,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 2299. [2022-03-03 20:11:12,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 2.365100087032202) internal successors, (5435), 2298 states have internal predecessors, (5435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:12,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 5435 transitions. [2022-03-03 20:11:12,068 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 5435 transitions. Word has length 31 [2022-03-03 20:11:12,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:11:12,068 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 5435 transitions. [2022-03-03 20:11:12,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:12,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 5435 transitions. [2022-03-03 20:11:12,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 20:11:12,071 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:11:12,071 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:11:12,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-03 20:11:12,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:11:12,287 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:11:12,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:11:12,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1903086369, now seen corresponding path program 24 times [2022-03-03 20:11:12,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:11:12,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415983762] [2022-03-03 20:11:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:11:12,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:11:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:11:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:12,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:11:12,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415983762] [2022-03-03 20:11:12,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415983762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:11:12,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69952572] [2022-03-03 20:11:12,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:11:12,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:11:12,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:11:12,480 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:11:12,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 20:11:12,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 20:11:12,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:11:12,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:11:12,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:11:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:13,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:11:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:13,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69952572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:11:13,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:11:13,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2022-03-03 20:11:13,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052964052] [2022-03-03 20:11:13,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:11:13,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 20:11:13,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:11:13,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 20:11:13,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 20:11:13,408 INFO L87 Difference]: Start difference. First operand 2299 states and 5435 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:19,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:11:19,654 INFO L93 Difference]: Finished difference Result 6164 states and 13824 transitions. [2022-03-03 20:11:19,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-03-03 20:11:19,654 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 20:11:19,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:11:19,662 INFO L225 Difference]: With dead ends: 6164 [2022-03-03 20:11:19,662 INFO L226 Difference]: Without dead ends: 6119 [2022-03-03 20:11:19,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12231 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=6371, Invalid=23041, Unknown=0, NotChecked=0, Total=29412 [2022-03-03 20:11:19,664 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 720 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:11:19,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 280 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:11:19,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6119 states. [2022-03-03 20:11:19,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6119 to 3767. [2022-03-03 20:11:19,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3766 states have (on average 2.374137015400956) internal successors, (8941), 3766 states have internal predecessors, (8941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 8941 transitions. [2022-03-03 20:11:19,740 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 8941 transitions. Word has length 31 [2022-03-03 20:11:19,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:11:19,741 INFO L470 AbstractCegarLoop]: Abstraction has 3767 states and 8941 transitions. [2022-03-03 20:11:19,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:19,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 8941 transitions. [2022-03-03 20:11:19,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 20:11:19,746 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:11:19,746 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:11:19,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-03 20:11:19,955 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,SelfDestructingSolverStorable25 [2022-03-03 20:11:19,955 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:11:19,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:11:19,956 INFO L85 PathProgramCache]: Analyzing trace with hash -904596441, now seen corresponding path program 25 times [2022-03-03 20:11:19,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:11:19,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746390097] [2022-03-03 20:11:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:11:19,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:11:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:11:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:20,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:11:20,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746390097] [2022-03-03 20:11:20,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746390097] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:11:20,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830644547] [2022-03-03 20:11:20,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:11:20,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:11:20,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:11:20,204 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:11:20,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 20:11:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:11:20,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 20:11:20,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:11:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:20,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:11:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:21,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830644547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:11:21,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:11:21,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-03 20:11:21,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009716488] [2022-03-03 20:11:21,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:11:21,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 20:11:21,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:11:21,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 20:11:21,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 20:11:21,515 INFO L87 Difference]: Start difference. First operand 3767 states and 8941 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:27,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:11:27,369 INFO L93 Difference]: Finished difference Result 6121 states and 14073 transitions. [2022-03-03 20:11:27,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-03 20:11:27,370 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 20:11:27,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:11:27,376 INFO L225 Difference]: With dead ends: 6121 [2022-03-03 20:11:27,376 INFO L226 Difference]: Without dead ends: 6005 [2022-03-03 20:11:27,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 42 SyntacticMatches, 10 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8029 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3648, Invalid=16374, Unknown=0, NotChecked=0, Total=20022 [2022-03-03 20:11:27,378 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 530 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:11:27,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 225 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1325 Invalid, 0 Unknown, 658 Unchecked, 0.7s Time] [2022-03-03 20:11:27,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2022-03-03 20:11:27,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 3993. [2022-03-03 20:11:27,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3993 states, 3992 states have (on average 2.3599699398797593) internal successors, (9421), 3992 states have internal predecessors, (9421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:27,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3993 states to 3993 states and 9421 transitions. [2022-03-03 20:11:27,444 INFO L78 Accepts]: Start accepts. Automaton has 3993 states and 9421 transitions. Word has length 31 [2022-03-03 20:11:27,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:11:27,444 INFO L470 AbstractCegarLoop]: Abstraction has 3993 states and 9421 transitions. [2022-03-03 20:11:27,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:27,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3993 states and 9421 transitions. [2022-03-03 20:11:27,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 20:11:27,449 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:11:27,449 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:11:27,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 20:11:27,663 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,SelfDestructingSolverStorable26 [2022-03-03 20:11:27,663 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:11:27,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:11:27,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1973777929, now seen corresponding path program 26 times [2022-03-03 20:11:27,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:11:27,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837937154] [2022-03-03 20:11:27,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:11:27,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:11:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:11:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:27,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:11:27,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837937154] [2022-03-03 20:11:27,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837937154] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:11:27,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002490547] [2022-03-03 20:11:27,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:11:27,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:11:27,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:11:27,886 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:11:27,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 20:11:27,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:11:27,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:11:27,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 20:11:27,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:11:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:28,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:11:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:29,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002490547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:11:29,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:11:29,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 41 [2022-03-03 20:11:29,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440402977] [2022-03-03 20:11:29,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:11:29,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 20:11:29,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:11:29,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 20:11:29,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 20:11:29,762 INFO L87 Difference]: Start difference. First operand 3993 states and 9421 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:53,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:11:53,390 INFO L93 Difference]: Finished difference Result 9171 states and 20860 transitions. [2022-03-03 20:11:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2022-03-03 20:11:53,390 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 20:11:53,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:11:53,401 INFO L225 Difference]: With dead ends: 9171 [2022-03-03 20:11:53,402 INFO L226 Difference]: Without dead ends: 9012 [2022-03-03 20:11:53,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 45 SyntacticMatches, 20 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 30286 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=10481, Invalid=54799, Unknown=0, NotChecked=0, Total=65280 [2022-03-03 20:11:53,404 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1050 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:11:53,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 500 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 2037 Invalid, 0 Unknown, 660 Unchecked, 1.2s Time] [2022-03-03 20:11:53,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9012 states. [2022-03-03 20:11:53,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9012 to 4514. [2022-03-03 20:11:53,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4514 states, 4513 states have (on average 2.348991801462442) internal successors, (10601), 4513 states have internal predecessors, (10601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4514 states to 4514 states and 10601 transitions. [2022-03-03 20:11:53,486 INFO L78 Accepts]: Start accepts. Automaton has 4514 states and 10601 transitions. Word has length 31 [2022-03-03 20:11:53,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:11:53,486 INFO L470 AbstractCegarLoop]: Abstraction has 4514 states and 10601 transitions. [2022-03-03 20:11:53,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:53,487 INFO L276 IsEmpty]: Start isEmpty. Operand 4514 states and 10601 transitions. [2022-03-03 20:11:53,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 20:11:53,493 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:11:53,493 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:11:53,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 20:11:53,696 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,SelfDestructingSolverStorable27 [2022-03-03 20:11:53,696 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:11:53,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:11:53,696 INFO L85 PathProgramCache]: Analyzing trace with hash 35494899, now seen corresponding path program 27 times [2022-03-03 20:11:53,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:11:53,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724562184] [2022-03-03 20:11:53,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:11:53,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:11:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:11:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:53,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:11:53,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724562184] [2022-03-03 20:11:53,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724562184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:11:53,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167205444] [2022-03-03 20:11:53,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:11:53,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:11:53,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:11:53,871 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:11:53,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 20:11:53,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 20:11:53,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:11:53,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 20:11:53,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:11:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:54,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:11:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:54,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167205444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:11:54,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:11:54,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 36 [2022-03-03 20:11:54,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597830748] [2022-03-03 20:11:54,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:11:54,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 20:11:54,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:11:54,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 20:11:54,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 20:11:54,836 INFO L87 Difference]: Start difference. First operand 4514 states and 10601 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:11:57,519 INFO L93 Difference]: Finished difference Result 7799 states and 18028 transitions. [2022-03-03 20:11:57,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 20:11:57,519 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 20:11:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:11:57,529 INFO L225 Difference]: With dead ends: 7799 [2022-03-03 20:11:57,529 INFO L226 Difference]: Without dead ends: 7793 [2022-03-03 20:11:57,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3365 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2444, Invalid=7258, Unknown=0, NotChecked=0, Total=9702 [2022-03-03 20:11:57,530 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 648 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:11:57,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 210 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:11:57,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2022-03-03 20:11:57,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 5845. [2022-03-03 20:11:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5845 states, 5844 states have (on average 2.384154688569473) internal successors, (13933), 5844 states have internal predecessors, (13933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5845 states to 5845 states and 13933 transitions. [2022-03-03 20:11:57,623 INFO L78 Accepts]: Start accepts. Automaton has 5845 states and 13933 transitions. Word has length 31 [2022-03-03 20:11:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:11:57,623 INFO L470 AbstractCegarLoop]: Abstraction has 5845 states and 13933 transitions. [2022-03-03 20:11:57,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:11:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 5845 states and 13933 transitions. [2022-03-03 20:11:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 20:11:57,631 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:11:57,631 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:11:57,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 20:11:57,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-03 20:11:57,843 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:11:57,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:11:57,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1960214635, now seen corresponding path program 28 times [2022-03-03 20:11:57,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:11:57,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457642354] [2022-03-03 20:11:57,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:11:57,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:11:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:11:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:11:58,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:11:58,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457642354] [2022-03-03 20:11:58,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457642354] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:11:58,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809601293] [2022-03-03 20:11:58,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:11:58,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:11:58,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:11:58,013 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:11:58,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 20:11:58,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:11:58,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:11:58,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 20:11:58,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:11:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:11:58,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:11:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:11:58,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809601293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:11:58,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:11:58,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2022-03-03 20:11:58,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859020351] [2022-03-03 20:11:58,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:11:58,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 20:11:58,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:11:58,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 20:11:58,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 20:11:58,946 INFO L87 Difference]: Start difference. First operand 5845 states and 13933 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:00,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:00,387 INFO L93 Difference]: Finished difference Result 7411 states and 17541 transitions. [2022-03-03 20:12:00,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 20:12:00,387 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 20:12:00,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:00,397 INFO L225 Difference]: With dead ends: 7411 [2022-03-03 20:12:00,397 INFO L226 Difference]: Without dead ends: 7388 [2022-03-03 20:12:00,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1290, Invalid=3680, Unknown=0, NotChecked=0, Total=4970 [2022-03-03 20:12:00,398 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 362 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:00,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 181 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:12:00,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2022-03-03 20:12:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 6246. [2022-03-03 20:12:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6246 states, 6245 states have (on average 2.387990392313851) internal successors, (14913), 6245 states have internal predecessors, (14913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:00,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6246 states to 6246 states and 14913 transitions. [2022-03-03 20:12:00,487 INFO L78 Accepts]: Start accepts. Automaton has 6246 states and 14913 transitions. Word has length 31 [2022-03-03 20:12:00,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:00,487 INFO L470 AbstractCegarLoop]: Abstraction has 6246 states and 14913 transitions. [2022-03-03 20:12:00,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:00,487 INFO L276 IsEmpty]: Start isEmpty. Operand 6246 states and 14913 transitions. [2022-03-03 20:12:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 20:12:00,495 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:00,495 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:12:00,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-03 20:12:00,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:00,715 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:12:00,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:00,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1947749671, now seen corresponding path program 29 times [2022-03-03 20:12:00,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:00,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67033769] [2022-03-03 20:12:00,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:00,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:00,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:00,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67033769] [2022-03-03 20:12:00,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67033769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:00,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421493957] [2022-03-03 20:12:00,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:12:00,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:00,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:00,871 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:12:00,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 20:12:00,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-03 20:12:00,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:12:00,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 20:12:00,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:01,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:01,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421493957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:01,897 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:01,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 34 [2022-03-03 20:12:01,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560954975] [2022-03-03 20:12:01,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:01,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 20:12:01,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:01,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 20:12:01,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 20:12:01,897 INFO L87 Difference]: Start difference. First operand 6246 states and 14913 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:05,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:05,303 INFO L93 Difference]: Finished difference Result 9896 states and 23200 transitions. [2022-03-03 20:12:05,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-03 20:12:05,303 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 20:12:05,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:05,317 INFO L225 Difference]: With dead ends: 9896 [2022-03-03 20:12:05,317 INFO L226 Difference]: Without dead ends: 9869 [2022-03-03 20:12:05,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3944 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2625, Invalid=8505, Unknown=0, NotChecked=0, Total=11130 [2022-03-03 20:12:05,319 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 442 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:05,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 262 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:12:05,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9869 states. [2022-03-03 20:12:05,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9869 to 7467. [2022-03-03 20:12:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7467 states, 7466 states have (on average 2.40208947227431) internal successors, (17934), 7466 states have internal predecessors, (17934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7467 states to 7467 states and 17934 transitions. [2022-03-03 20:12:05,457 INFO L78 Accepts]: Start accepts. Automaton has 7467 states and 17934 transitions. Word has length 31 [2022-03-03 20:12:05,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:05,457 INFO L470 AbstractCegarLoop]: Abstraction has 7467 states and 17934 transitions. [2022-03-03 20:12:05,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:05,457 INFO L276 IsEmpty]: Start isEmpty. Operand 7467 states and 17934 transitions. [2022-03-03 20:12:05,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 20:12:05,467 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:05,467 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:12:05,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 20:12:05,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:05,679 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:12:05,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:05,680 INFO L85 PathProgramCache]: Analyzing trace with hash -352748575, now seen corresponding path program 30 times [2022-03-03 20:12:05,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:05,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682940331] [2022-03-03 20:12:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:05,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:12:05,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:05,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682940331] [2022-03-03 20:12:05,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682940331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:05,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553787446] [2022-03-03 20:12:05,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:12:05,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:05,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:05,872 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:12:05,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 20:12:05,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 20:12:05,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:12:05,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-03 20:12:05,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:06,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:07,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553787446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:07,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:07,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 40 [2022-03-03 20:12:07,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201822834] [2022-03-03 20:12:07,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:07,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 20:12:07,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:07,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 20:12:07,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1287, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 20:12:07,385 INFO L87 Difference]: Start difference. First operand 7467 states and 17934 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:23,746 INFO L93 Difference]: Finished difference Result 12255 states and 28618 transitions. [2022-03-03 20:12:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-03-03 20:12:23,746 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 20:12:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:23,760 INFO L225 Difference]: With dead ends: 12255 [2022-03-03 20:12:23,761 INFO L226 Difference]: Without dead ends: 12086 [2022-03-03 20:12:23,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22716 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=6944, Invalid=47112, Unknown=0, NotChecked=0, Total=54056 [2022-03-03 20:12:23,763 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 840 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 2717 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 3045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 2717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:23,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 600 Invalid, 3045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 2717 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 20:12:23,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12086 states. [2022-03-03 20:12:23,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12086 to 7931. [2022-03-03 20:12:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 2.4058007566204287) internal successors, (19078), 7930 states have internal predecessors, (19078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 19078 transitions. [2022-03-03 20:12:23,899 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 19078 transitions. Word has length 31 [2022-03-03 20:12:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:23,899 INFO L470 AbstractCegarLoop]: Abstraction has 7931 states and 19078 transitions. [2022-03-03 20:12:23,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 19078 transitions. [2022-03-03 20:12:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 20:12:23,908 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:23,908 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:12:23,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-03 20:12:24,108 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,SelfDestructingSolverStorable31 [2022-03-03 20:12:24,108 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:12:24,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:24,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1441871721, now seen corresponding path program 31 times [2022-03-03 20:12:24,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:24,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347936820] [2022-03-03 20:12:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:24,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 20:12:24,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:24,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347936820] [2022-03-03 20:12:24,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347936820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:24,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007115315] [2022-03-03 20:12:24,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:12:24,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:24,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:24,291 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:12:24,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 20:12:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:24,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 20:12:24,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:24,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:26,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007115315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:26,033 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:26,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 39 [2022-03-03 20:12:26,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229687254] [2022-03-03 20:12:26,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:26,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-03 20:12:26,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:26,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-03 20:12:26,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1175, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 20:12:26,034 INFO L87 Difference]: Start difference. First operand 7931 states and 19078 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:39,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:39,226 INFO L93 Difference]: Finished difference Result 14065 states and 33184 transitions. [2022-03-03 20:12:39,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-03 20:12:39,226 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 20:12:39,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:39,246 INFO L225 Difference]: With dead ends: 14065 [2022-03-03 20:12:39,246 INFO L226 Difference]: Without dead ends: 13939 [2022-03-03 20:12:39,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11148 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=6150, Invalid=22920, Unknown=0, NotChecked=0, Total=29070 [2022-03-03 20:12:39,248 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 809 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:39,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 529 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 2007 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 20:12:39,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13939 states. [2022-03-03 20:12:39,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13939 to 8747. [2022-03-03 20:12:39,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8747 states, 8746 states have (on average 2.4141321747084383) internal successors, (21114), 8746 states have internal predecessors, (21114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8747 states to 8747 states and 21114 transitions. [2022-03-03 20:12:39,417 INFO L78 Accepts]: Start accepts. Automaton has 8747 states and 21114 transitions. Word has length 31 [2022-03-03 20:12:39,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:39,417 INFO L470 AbstractCegarLoop]: Abstraction has 8747 states and 21114 transitions. [2022-03-03 20:12:39,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 8747 states and 21114 transitions. [2022-03-03 20:12:39,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 20:12:39,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:39,429 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:12:39,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 20:12:39,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:39,629 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:12:39,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:39,630 INFO L85 PathProgramCache]: Analyzing trace with hash -74939733, now seen corresponding path program 32 times [2022-03-03 20:12:39,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:39,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179137266] [2022-03-03 20:12:39,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:39,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:39,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:39,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179137266] [2022-03-03 20:12:39,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179137266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:39,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015035099] [2022-03-03 20:12:39,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:12:39,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:39,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:39,863 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:12:39,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 20:12:39,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:12:39,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:12:39,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 20:12:39,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:40,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:41,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015035099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:41,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:41,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-03 20:12:41,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835698732] [2022-03-03 20:12:41,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:41,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 20:12:41,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:41,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 20:12:41,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 20:12:41,408 INFO L87 Difference]: Start difference. First operand 8747 states and 21114 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:54,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:54,667 INFO L93 Difference]: Finished difference Result 18782 states and 44443 transitions. [2022-03-03 20:12:54,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2022-03-03 20:12:54,668 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 20:12:54,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:54,693 INFO L225 Difference]: With dead ends: 18782 [2022-03-03 20:12:54,693 INFO L226 Difference]: Without dead ends: 18757 [2022-03-03 20:12:54,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28310 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=8746, Invalid=56534, Unknown=0, NotChecked=0, Total=65280 [2022-03-03 20:12:54,696 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 705 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 692 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:54,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 478 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 2092 Invalid, 0 Unknown, 692 Unchecked, 1.1s Time] [2022-03-03 20:12:54,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18757 states. [2022-03-03 20:12:54,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18757 to 9498. [2022-03-03 20:12:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9498 states, 9497 states have (on average 2.419816784247657) internal successors, (22981), 9497 states have internal predecessors, (22981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:54,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9498 states to 9498 states and 22981 transitions. [2022-03-03 20:12:54,943 INFO L78 Accepts]: Start accepts. Automaton has 9498 states and 22981 transitions. Word has length 31 [2022-03-03 20:12:54,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:54,943 INFO L470 AbstractCegarLoop]: Abstraction has 9498 states and 22981 transitions. [2022-03-03 20:12:54,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:54,944 INFO L276 IsEmpty]: Start isEmpty. Operand 9498 states and 22981 transitions. [2022-03-03 20:12:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 20:12:54,954 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:54,954 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:12:54,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-03 20:12:55,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:55,155 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:12:55,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:12:55,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2119534507, now seen corresponding path program 33 times [2022-03-03 20:12:55,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:12:55,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200936841] [2022-03-03 20:12:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:12:55,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:12:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:12:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:55,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:12:55,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200936841] [2022-03-03 20:12:55,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200936841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:12:55,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967684154] [2022-03-03 20:12:55,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:12:55,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:12:55,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:12:55,323 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:12:55,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 20:12:55,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 20:12:55,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:12:55,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 20:12:55,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:12:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:55,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:12:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:12:56,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967684154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:12:56,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:12:56,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2022-03-03 20:12:56,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532114883] [2022-03-03 20:12:56,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:12:56,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 20:12:56,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:12:56,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 20:12:56,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 20:12:56,260 INFO L87 Difference]: Start difference. First operand 9498 states and 22981 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:59,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:12:59,618 INFO L93 Difference]: Finished difference Result 13376 states and 31636 transitions. [2022-03-03 20:12:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-03 20:12:59,619 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 20:12:59,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:12:59,641 INFO L225 Difference]: With dead ends: 13376 [2022-03-03 20:12:59,641 INFO L226 Difference]: Without dead ends: 13355 [2022-03-03 20:12:59,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4718 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3140, Invalid=9742, Unknown=0, NotChecked=0, Total=12882 [2022-03-03 20:12:59,642 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 671 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:12:59,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 377 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:12:59,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13355 states. [2022-03-03 20:12:59,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13355 to 9888. [2022-03-03 20:12:59,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9888 states, 9887 states have (on average 2.43633053504602) internal successors, (24088), 9887 states have internal predecessors, (24088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:59,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9888 states to 9888 states and 24088 transitions. [2022-03-03 20:12:59,803 INFO L78 Accepts]: Start accepts. Automaton has 9888 states and 24088 transitions. Word has length 31 [2022-03-03 20:12:59,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:12:59,803 INFO L470 AbstractCegarLoop]: Abstraction has 9888 states and 24088 transitions. [2022-03-03 20:12:59,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:12:59,803 INFO L276 IsEmpty]: Start isEmpty. Operand 9888 states and 24088 transitions. [2022-03-03 20:12:59,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 20:12:59,812 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:12:59,812 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:12:59,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-03 20:13:00,013 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,SelfDestructingSolverStorable34 [2022-03-03 20:13:00,013 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:13:00,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:00,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1454095937, now seen corresponding path program 34 times [2022-03-03 20:13:00,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:00,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939984812] [2022-03-03 20:13:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:00,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:13:00,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:00,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939984812] [2022-03-03 20:13:00,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939984812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:00,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246838126] [2022-03-03 20:13:00,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:13:00,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:00,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:00,232 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:13:00,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 20:13:00,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:13:00,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:00,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 20:13:00,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:00,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:02,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246838126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:02,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:02,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 40 [2022-03-03 20:13:02,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021335393] [2022-03-03 20:13:02,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:02,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 20:13:02,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:02,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 20:13:02,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 20:13:02,154 INFO L87 Difference]: Start difference. First operand 9888 states and 24088 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:24,532 INFO L93 Difference]: Finished difference Result 17705 states and 41885 transitions. [2022-03-03 20:13:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2022-03-03 20:13:24,533 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 20:13:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:24,559 INFO L225 Difference]: With dead ends: 17705 [2022-03-03 20:13:24,559 INFO L226 Difference]: Without dead ends: 17594 [2022-03-03 20:13:24,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 45 SyntacticMatches, 17 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 30848 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=10018, Invalid=56288, Unknown=0, NotChecked=0, Total=66306 [2022-03-03 20:13:24,562 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 949 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:24,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 639 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 2540 Invalid, 0 Unknown, 155 Unchecked, 1.4s Time] [2022-03-03 20:13:24,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17594 states. [2022-03-03 20:13:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17594 to 10848. [2022-03-03 20:13:24,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10848 states, 10847 states have (on average 2.433576103991887) internal successors, (26397), 10847 states have internal predecessors, (26397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:24,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10848 states to 10848 states and 26397 transitions. [2022-03-03 20:13:24,768 INFO L78 Accepts]: Start accepts. Automaton has 10848 states and 26397 transitions. Word has length 31 [2022-03-03 20:13:24,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:24,768 INFO L470 AbstractCegarLoop]: Abstraction has 10848 states and 26397 transitions. [2022-03-03 20:13:24,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:24,768 INFO L276 IsEmpty]: Start isEmpty. Operand 10848 states and 26397 transitions. [2022-03-03 20:13:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 20:13:24,777 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:24,777 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:13:24,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-03 20:13:24,978 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,SelfDestructingSolverStorable35 [2022-03-03 20:13:24,978 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:13:24,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:24,978 INFO L85 PathProgramCache]: Analyzing trace with hash -492324689, now seen corresponding path program 35 times [2022-03-03 20:13:24,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:24,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833433430] [2022-03-03 20:13:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:24,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:25,230 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:25,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833433430] [2022-03-03 20:13:25,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833433430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:25,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818011564] [2022-03-03 20:13:25,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:13:25,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:25,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:25,232 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:13:25,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 20:13:25,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 20:13:25,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:25,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 20:13:25,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:26,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:26,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818011564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:26,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:26,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-03 20:13:26,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135134486] [2022-03-03 20:13:26,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:26,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 20:13:26,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:26,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 20:13:26,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 20:13:26,831 INFO L87 Difference]: Start difference. First operand 10848 states and 26397 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:39,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:39,822 INFO L93 Difference]: Finished difference Result 17432 states and 41445 transitions. [2022-03-03 20:13:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2022-03-03 20:13:39,823 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 20:13:39,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:39,869 INFO L225 Difference]: With dead ends: 17432 [2022-03-03 20:13:39,869 INFO L226 Difference]: Without dead ends: 17272 [2022-03-03 20:13:39,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25305 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=8414, Invalid=50878, Unknown=0, NotChecked=0, Total=59292 [2022-03-03 20:13:39,871 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 909 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 3132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 540 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:39,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 432 Invalid, 3132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 2293 Invalid, 0 Unknown, 540 Unchecked, 1.1s Time] [2022-03-03 20:13:39,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17272 states. [2022-03-03 20:13:40,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17272 to 10560. [2022-03-03 20:13:40,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10560 states, 10559 states have (on average 2.4364049625911544) internal successors, (25726), 10559 states have internal predecessors, (25726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:40,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10560 states to 10560 states and 25726 transitions. [2022-03-03 20:13:40,064 INFO L78 Accepts]: Start accepts. Automaton has 10560 states and 25726 transitions. Word has length 31 [2022-03-03 20:13:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:40,064 INFO L470 AbstractCegarLoop]: Abstraction has 10560 states and 25726 transitions. [2022-03-03 20:13:40,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 10560 states and 25726 transitions. [2022-03-03 20:13:40,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 20:13:40,098 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:40,098 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:13:40,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-03 20:13:40,298 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,SelfDestructingSolverStorable36 [2022-03-03 20:13:40,299 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:13:40,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:40,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1685542175, now seen corresponding path program 36 times [2022-03-03 20:13:40,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:40,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733662555] [2022-03-03 20:13:40,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:40,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:40,376 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:40,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733662555] [2022-03-03 20:13:40,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733662555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:40,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612059870] [2022-03-03 20:13:40,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:13:40,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:40,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:40,377 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:13:40,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 20:13:40,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 20:13:40,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:40,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 20:13:40,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:40,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:41,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612059870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:41,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:41,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-03-03 20:13:41,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138941875] [2022-03-03 20:13:41,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:41,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 20:13:41,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:41,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 20:13:41,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=903, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 20:13:41,057 INFO L87 Difference]: Start difference. First operand 10560 states and 25726 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:42,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:42,215 INFO L93 Difference]: Finished difference Result 12545 states and 30331 transitions. [2022-03-03 20:13:42,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:13:42,215 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 20:13:42,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:42,232 INFO L225 Difference]: With dead ends: 12545 [2022-03-03 20:13:42,233 INFO L226 Difference]: Without dead ends: 12541 [2022-03-03 20:13:42,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1818, Invalid=4988, Unknown=0, NotChecked=0, Total=6806 [2022-03-03 20:13:42,233 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 291 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:42,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 186 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:13:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12541 states. [2022-03-03 20:13:42,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12541 to 11369. [2022-03-03 20:13:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11369 states, 11368 states have (on average 2.4481878958479943) internal successors, (27831), 11368 states have internal predecessors, (27831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:42,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11369 states to 11369 states and 27831 transitions. [2022-03-03 20:13:42,396 INFO L78 Accepts]: Start accepts. Automaton has 11369 states and 27831 transitions. Word has length 31 [2022-03-03 20:13:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:42,396 INFO L470 AbstractCegarLoop]: Abstraction has 11369 states and 27831 transitions. [2022-03-03 20:13:42,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:42,397 INFO L276 IsEmpty]: Start isEmpty. Operand 11369 states and 27831 transitions. [2022-03-03 20:13:42,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 20:13:42,407 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:42,407 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:13:42,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-03 20:13:42,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:42,608 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:13:42,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:42,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1393248479, now seen corresponding path program 37 times [2022-03-03 20:13:42,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:42,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397761593] [2022-03-03 20:13:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:42,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:42,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:42,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397761593] [2022-03-03 20:13:42,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397761593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:42,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022162003] [2022-03-03 20:13:42,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:13:42,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:42,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:42,975 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:13:42,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 20:13:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:43,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:13:43,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:43,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:43,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022162003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:43,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:43,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2022-03-03 20:13:43,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365354082] [2022-03-03 20:13:43,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:43,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-03 20:13:43,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:43,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-03 20:13:43,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 20:13:43,887 INFO L87 Difference]: Start difference. First operand 11369 states and 27831 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:46,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:46,183 INFO L93 Difference]: Finished difference Result 12972 states and 30945 transitions. [2022-03-03 20:13:46,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 20:13:46,183 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-03 20:13:46,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:46,206 INFO L225 Difference]: With dead ends: 12972 [2022-03-03 20:13:46,207 INFO L226 Difference]: Without dead ends: 12972 [2022-03-03 20:13:46,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3545 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2658, Invalid=8898, Unknown=0, NotChecked=0, Total=11556 [2022-03-03 20:13:46,208 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 494 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:46,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 251 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:13:46,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12972 states. [2022-03-03 20:13:46,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12972 to 10915. [2022-03-03 20:13:46,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10915 states, 10914 states have (on average 2.455011911306579) internal successors, (26794), 10914 states have internal predecessors, (26794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10915 states to 10915 states and 26794 transitions. [2022-03-03 20:13:46,440 INFO L78 Accepts]: Start accepts. Automaton has 10915 states and 26794 transitions. Word has length 33 [2022-03-03 20:13:46,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:46,440 INFO L470 AbstractCegarLoop]: Abstraction has 10915 states and 26794 transitions. [2022-03-03 20:13:46,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:46,441 INFO L276 IsEmpty]: Start isEmpty. Operand 10915 states and 26794 transitions. [2022-03-03 20:13:46,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 20:13:46,453 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:46,453 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:13:46,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-03 20:13:46,670 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,SelfDestructingSolverStorable38 [2022-03-03 20:13:46,670 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:13:46,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:46,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1039636493, now seen corresponding path program 38 times [2022-03-03 20:13:46,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:46,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008485678] [2022-03-03 20:13:46,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:46,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:46,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:46,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008485678] [2022-03-03 20:13:46,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008485678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:46,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666414879] [2022-03-03 20:13:46,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:13:46,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:46,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:46,746 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:13:46,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 20:13:46,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:13:46,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:46,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 20:13:46,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:47,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:47,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666414879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:47,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:47,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 31 [2022-03-03 20:13:47,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193188204] [2022-03-03 20:13:47,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:47,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 20:13:47,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:47,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 20:13:47,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2022-03-03 20:13:47,409 INFO L87 Difference]: Start difference. First operand 10915 states and 26794 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:49,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:13:49,091 INFO L93 Difference]: Finished difference Result 11524 states and 27953 transitions. [2022-03-03 20:13:49,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-03 20:13:49,092 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-03 20:13:49,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:13:49,107 INFO L225 Difference]: With dead ends: 11524 [2022-03-03 20:13:49,107 INFO L226 Difference]: Without dead ends: 11520 [2022-03-03 20:13:49,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3332 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2919, Invalid=7793, Unknown=0, NotChecked=0, Total=10712 [2022-03-03 20:13:49,108 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 322 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:13:49,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 102 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:13:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11520 states. [2022-03-03 20:13:49,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11520 to 10874. [2022-03-03 20:13:49,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10874 states, 10873 states have (on average 2.4531408075048287) internal successors, (26673), 10873 states have internal predecessors, (26673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10874 states to 10874 states and 26673 transitions. [2022-03-03 20:13:49,281 INFO L78 Accepts]: Start accepts. Automaton has 10874 states and 26673 transitions. Word has length 33 [2022-03-03 20:13:49,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:13:49,281 INFO L470 AbstractCegarLoop]: Abstraction has 10874 states and 26673 transitions. [2022-03-03 20:13:49,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:13:49,281 INFO L276 IsEmpty]: Start isEmpty. Operand 10874 states and 26673 transitions. [2022-03-03 20:13:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 20:13:49,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:13:49,293 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:13:49,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-03 20:13:49,507 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,SelfDestructingSolverStorable39 [2022-03-03 20:13:49,507 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:13:49,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:13:49,508 INFO L85 PathProgramCache]: Analyzing trace with hash -2068346637, now seen corresponding path program 39 times [2022-03-03 20:13:49,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:13:49,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223095647] [2022-03-03 20:13:49,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:13:49,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:13:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:13:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:49,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:13:49,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223095647] [2022-03-03 20:13:49,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223095647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:13:49,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649600992] [2022-03-03 20:13:49,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:13:49,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:13:49,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:13:49,732 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:13:49,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 20:13:49,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 20:13:49,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:13:49,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:13:49,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:13:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:50,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:13:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:13:51,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649600992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:13:51,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:13:51,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 45 [2022-03-03 20:13:51,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347935481] [2022-03-03 20:13:51,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:13:51,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 20:13:51,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:13:51,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 20:13:51,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 20:13:51,087 INFO L87 Difference]: Start difference. First operand 10874 states and 26673 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:01,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:01,390 INFO L93 Difference]: Finished difference Result 14204 states and 34076 transitions. [2022-03-03 20:14:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-03-03 20:14:01,390 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-03 20:14:01,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:01,407 INFO L225 Difference]: With dead ends: 14204 [2022-03-03 20:14:01,408 INFO L226 Difference]: Without dead ends: 14039 [2022-03-03 20:14:01,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23795 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=6830, Invalid=56422, Unknown=0, NotChecked=0, Total=63252 [2022-03-03 20:14:01,410 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 940 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 3596 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 3957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 3596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:01,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 607 Invalid, 3957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 3596 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 20:14:01,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14039 states. [2022-03-03 20:14:01,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14039 to 12176. [2022-03-03 20:14:01,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12176 states, 12175 states have (on average 2.4552772073921973) internal successors, (29893), 12175 states have internal predecessors, (29893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12176 states to 12176 states and 29893 transitions. [2022-03-03 20:14:01,576 INFO L78 Accepts]: Start accepts. Automaton has 12176 states and 29893 transitions. Word has length 33 [2022-03-03 20:14:01,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:01,576 INFO L470 AbstractCegarLoop]: Abstraction has 12176 states and 29893 transitions. [2022-03-03 20:14:01,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:01,576 INFO L276 IsEmpty]: Start isEmpty. Operand 12176 states and 29893 transitions. [2022-03-03 20:14:01,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 20:14:01,587 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:01,588 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:01,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:01,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:01,788 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:14:01,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:01,788 INFO L85 PathProgramCache]: Analyzing trace with hash -226544083, now seen corresponding path program 40 times [2022-03-03 20:14:01,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:01,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161483250] [2022-03-03 20:14:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:01,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:02,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:02,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161483250] [2022-03-03 20:14:02,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161483250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:02,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634299977] [2022-03-03 20:14:02,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:14:02,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:02,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:02,127 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:02,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 20:14:02,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:14:02,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:02,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 20:14:02,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:03,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:04,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634299977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:04,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:04,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 16] total 40 [2022-03-03 20:14:04,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778092689] [2022-03-03 20:14:04,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:04,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 20:14:04,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:04,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 20:14:04,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 20:14:04,441 INFO L87 Difference]: Start difference. First operand 12176 states and 29893 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:19,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:19,591 INFO L93 Difference]: Finished difference Result 18035 states and 43408 transitions. [2022-03-03 20:14:19,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-03 20:14:19,591 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-03 20:14:19,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:19,616 INFO L225 Difference]: With dead ends: 18035 [2022-03-03 20:14:19,616 INFO L226 Difference]: Without dead ends: 17960 [2022-03-03 20:14:19,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8150 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=4479, Invalid=18473, Unknown=0, NotChecked=0, Total=22952 [2022-03-03 20:14:19,618 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 653 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:19,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 333 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1770 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 20:14:19,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17960 states. [2022-03-03 20:14:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17960 to 13359. [2022-03-03 20:14:19,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13359 states, 13358 states have (on average 2.4353196586315318) internal successors, (32531), 13358 states have internal predecessors, (32531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13359 states to 13359 states and 32531 transitions. [2022-03-03 20:14:19,863 INFO L78 Accepts]: Start accepts. Automaton has 13359 states and 32531 transitions. Word has length 33 [2022-03-03 20:14:19,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:19,863 INFO L470 AbstractCegarLoop]: Abstraction has 13359 states and 32531 transitions. [2022-03-03 20:14:19,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:19,863 INFO L276 IsEmpty]: Start isEmpty. Operand 13359 states and 32531 transitions. [2022-03-03 20:14:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 20:14:19,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:19,875 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:19,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:20,075 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,SelfDestructingSolverStorable41 [2022-03-03 20:14:20,076 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:14:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:20,076 INFO L85 PathProgramCache]: Analyzing trace with hash -420701097, now seen corresponding path program 41 times [2022-03-03 20:14:20,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:20,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491480423] [2022-03-03 20:14:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:20,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:14:20,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:20,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491480423] [2022-03-03 20:14:20,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491480423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:20,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918142837] [2022-03-03 20:14:20,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:14:20,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:20,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:20,184 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:20,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 20:14:20,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-03 20:14:20,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:20,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 20:14:20,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:14:20,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:21,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918142837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:21,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:21,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 15] total 32 [2022-03-03 20:14:21,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958714504] [2022-03-03 20:14:21,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:21,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 20:14:21,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:21,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 20:14:21,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 20:14:21,556 INFO L87 Difference]: Start difference. First operand 13359 states and 32531 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:23,048 INFO L93 Difference]: Finished difference Result 14697 states and 35526 transitions. [2022-03-03 20:14:23,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-03 20:14:23,049 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-03 20:14:23,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:23,069 INFO L225 Difference]: With dead ends: 14697 [2022-03-03 20:14:23,069 INFO L226 Difference]: Without dead ends: 14691 [2022-03-03 20:14:23,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2251 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1713, Invalid=4929, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 20:14:23,070 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 366 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:23,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 169 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:14:23,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14691 states. [2022-03-03 20:14:23,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14691 to 13470. [2022-03-03 20:14:23,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13470 states, 13469 states have (on average 2.432994283168758) internal successors, (32770), 13469 states have internal predecessors, (32770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:23,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13470 states to 13470 states and 32770 transitions. [2022-03-03 20:14:23,291 INFO L78 Accepts]: Start accepts. Automaton has 13470 states and 32770 transitions. Word has length 33 [2022-03-03 20:14:23,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:23,291 INFO L470 AbstractCegarLoop]: Abstraction has 13470 states and 32770 transitions. [2022-03-03 20:14:23,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:23,291 INFO L276 IsEmpty]: Start isEmpty. Operand 13470 states and 32770 transitions. [2022-03-03 20:14:23,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 20:14:23,307 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:23,307 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:23,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:23,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:23,520 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:14:23,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:23,520 INFO L85 PathProgramCache]: Analyzing trace with hash -971038451, now seen corresponding path program 42 times [2022-03-03 20:14:23,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:23,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376295276] [2022-03-03 20:14:23,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:23,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:23,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:23,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376295276] [2022-03-03 20:14:23,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376295276] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:23,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958746285] [2022-03-03 20:14:23,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:14:23,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:23,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:23,746 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:23,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 20:14:23,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 20:14:23,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:23,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-03 20:14:23,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:24,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:25,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958746285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:25,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:25,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-03-03 20:14:25,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132142337] [2022-03-03 20:14:25,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:25,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 20:14:25,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:25,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 20:14:25,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1661, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 20:14:25,204 INFO L87 Difference]: Start difference. First operand 13470 states and 32770 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:38,885 INFO L93 Difference]: Finished difference Result 19054 states and 45384 transitions. [2022-03-03 20:14:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-03-03 20:14:38,885 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-03 20:14:38,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:38,917 INFO L225 Difference]: With dead ends: 19054 [2022-03-03 20:14:38,917 INFO L226 Difference]: Without dead ends: 19045 [2022-03-03 20:14:38,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23019 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=8705, Invalid=45817, Unknown=0, NotChecked=0, Total=54522 [2022-03-03 20:14:38,919 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1186 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 652 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:38,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1186 Valid, 411 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1987 Invalid, 0 Unknown, 652 Unchecked, 1.0s Time] [2022-03-03 20:14:38,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19045 states. [2022-03-03 20:14:39,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19045 to 13793. [2022-03-03 20:14:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13793 states, 13792 states have (on average 2.4365574245939676) internal successors, (33605), 13792 states have internal predecessors, (33605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:39,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13793 states to 13793 states and 33605 transitions. [2022-03-03 20:14:39,191 INFO L78 Accepts]: Start accepts. Automaton has 13793 states and 33605 transitions. Word has length 35 [2022-03-03 20:14:39,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:39,191 INFO L470 AbstractCegarLoop]: Abstraction has 13793 states and 33605 transitions. [2022-03-03 20:14:39,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:39,191 INFO L276 IsEmpty]: Start isEmpty. Operand 13793 states and 33605 transitions. [2022-03-03 20:14:39,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 20:14:39,211 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:39,211 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:39,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-03 20:14:39,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:39,414 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:14:39,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:39,414 INFO L85 PathProgramCache]: Analyzing trace with hash 255734751, now seen corresponding path program 43 times [2022-03-03 20:14:39,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:39,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975976428] [2022-03-03 20:14:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:39,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:39,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:39,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975976428] [2022-03-03 20:14:39,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975976428] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:39,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201940579] [2022-03-03 20:14:39,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:14:39,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:39,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:39,665 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:39,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 20:14:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:39,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-03 20:14:39,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:40,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:42,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201940579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:42,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:42,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-03-03 20:14:42,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154532713] [2022-03-03 20:14:42,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:42,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-03 20:14:42,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:42,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-03 20:14:42,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1766, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 20:14:42,393 INFO L87 Difference]: Start difference. First operand 13793 states and 33605 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:21,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:21,831 INFO L93 Difference]: Finished difference Result 20048 states and 47741 transitions. [2022-03-03 20:15:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2022-03-03 20:15:21,831 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-03 20:15:21,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:21,862 INFO L225 Difference]: With dead ends: 20048 [2022-03-03 20:15:21,862 INFO L226 Difference]: Without dead ends: 20011 [2022-03-03 20:15:21,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 27278 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=10703, Invalid=52549, Unknown=0, NotChecked=0, Total=63252 [2022-03-03 20:15:21,865 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1342 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 2438 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 2438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:21,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1342 Valid, 541 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 2438 Invalid, 0 Unknown, 379 Unchecked, 1.5s Time] [2022-03-03 20:15:21,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20011 states. [2022-03-03 20:15:22,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20011 to 14278. [2022-03-03 20:15:22,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14278 states, 14277 states have (on average 2.436856482454297) internal successors, (34791), 14277 states have internal predecessors, (34791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:22,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14278 states to 14278 states and 34791 transitions. [2022-03-03 20:15:22,145 INFO L78 Accepts]: Start accepts. Automaton has 14278 states and 34791 transitions. Word has length 35 [2022-03-03 20:15:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:22,145 INFO L470 AbstractCegarLoop]: Abstraction has 14278 states and 34791 transitions. [2022-03-03 20:15:22,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:22,145 INFO L276 IsEmpty]: Start isEmpty. Operand 14278 states and 34791 transitions. [2022-03-03 20:15:22,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 20:15:22,161 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:22,161 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:22,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:22,362 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,SelfDestructingSolverStorable44 [2022-03-03 20:15:22,362 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:15:22,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:22,362 INFO L85 PathProgramCache]: Analyzing trace with hash 975083881, now seen corresponding path program 44 times [2022-03-03 20:15:22,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:22,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134718443] [2022-03-03 20:15:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:22,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:22,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:22,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134718443] [2022-03-03 20:15:22,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134718443] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:22,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356673465] [2022-03-03 20:15:22,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:15:22,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:22,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:22,610 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:22,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 20:15:22,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:15:22,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:22,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-03 20:15:22,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:23,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:25,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356673465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:25,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:25,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-03-03 20:15:25,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954834223] [2022-03-03 20:15:25,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:25,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-03 20:15:25,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:25,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-03 20:15:25,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1789, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 20:15:25,436 INFO L87 Difference]: Start difference. First operand 14278 states and 34791 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:02,178 INFO L93 Difference]: Finished difference Result 21356 states and 50836 transitions. [2022-03-03 20:16:02,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-03-03 20:16:02,179 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-03 20:16:02,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:02,216 INFO L225 Difference]: With dead ends: 21356 [2022-03-03 20:16:02,216 INFO L226 Difference]: Without dead ends: 21320 [2022-03-03 20:16:02,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 49 SyntacticMatches, 38 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 27665 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=9930, Invalid=46476, Unknown=0, NotChecked=0, Total=56406 [2022-03-03 20:16:02,219 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1379 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 3311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:02,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1379 Valid, 490 Invalid, 3311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 2450 Invalid, 0 Unknown, 449 Unchecked, 1.6s Time] [2022-03-03 20:16:02,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21320 states. [2022-03-03 20:16:02,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21320 to 14773. [2022-03-03 20:16:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14773 states, 14772 states have (on average 2.437855402112104) internal successors, (36012), 14772 states have internal predecessors, (36012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:02,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14773 states to 14773 states and 36012 transitions. [2022-03-03 20:16:02,506 INFO L78 Accepts]: Start accepts. Automaton has 14773 states and 36012 transitions. Word has length 35 [2022-03-03 20:16:02,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:02,506 INFO L470 AbstractCegarLoop]: Abstraction has 14773 states and 36012 transitions. [2022-03-03 20:16:02,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:02,506 INFO L276 IsEmpty]: Start isEmpty. Operand 14773 states and 36012 transitions. [2022-03-03 20:16:02,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 20:16:02,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:02,523 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:16:02,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-03 20:16:02,724 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,SelfDestructingSolverStorable45 [2022-03-03 20:16:02,724 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:16:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:02,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1746633437, now seen corresponding path program 45 times [2022-03-03 20:16:02,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:02,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387965645] [2022-03-03 20:16:02,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:02,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:02,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:02,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387965645] [2022-03-03 20:16:02,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387965645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:02,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589257303] [2022-03-03 20:16:02,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:16:02,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:02,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:02,965 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:02,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 20:16:02,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 20:16:02,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:02,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 20:16:02,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:03,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:03,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589257303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:03,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:03,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-03 20:16:03,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112505276] [2022-03-03 20:16:03,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:03,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 20:16:03,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:03,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 20:16:03,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 20:16:03,493 INFO L87 Difference]: Start difference. First operand 14773 states and 36012 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:06,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:06,974 INFO L93 Difference]: Finished difference Result 24704 states and 59667 transitions. [2022-03-03 20:16:06,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-03 20:16:06,974 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-03 20:16:06,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:07,015 INFO L225 Difference]: With dead ends: 24704 [2022-03-03 20:16:07,016 INFO L226 Difference]: Without dead ends: 24291 [2022-03-03 20:16:07,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5937 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2825, Invalid=14467, Unknown=0, NotChecked=0, Total=17292 [2022-03-03 20:16:07,017 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 724 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:07,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 264 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:16:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24291 states. [2022-03-03 20:16:07,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24291 to 18100. [2022-03-03 20:16:07,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18100 states, 18099 states have (on average 2.420188960716062) internal successors, (43803), 18099 states have internal predecessors, (43803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18100 states to 18100 states and 43803 transitions. [2022-03-03 20:16:07,395 INFO L78 Accepts]: Start accepts. Automaton has 18100 states and 43803 transitions. Word has length 35 [2022-03-03 20:16:07,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:07,395 INFO L470 AbstractCegarLoop]: Abstraction has 18100 states and 43803 transitions. [2022-03-03 20:16:07,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:07,395 INFO L276 IsEmpty]: Start isEmpty. Operand 18100 states and 43803 transitions. [2022-03-03 20:16:07,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 20:16:07,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:07,414 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:16:07,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-03 20:16:07,614 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,SelfDestructingSolverStorable46 [2022-03-03 20:16:07,614 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:16:07,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:07,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1003263075, now seen corresponding path program 46 times [2022-03-03 20:16:07,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:07,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403847885] [2022-03-03 20:16:07,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:07,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:07,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:07,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403847885] [2022-03-03 20:16:07,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403847885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:07,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032268519] [2022-03-03 20:16:07,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:16:07,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:07,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:07,898 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:07,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 20:16:07,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:16:07,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:07,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-03 20:16:07,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:08,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:09,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032268519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:09,606 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:09,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-03-03 20:16:09,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703669814] [2022-03-03 20:16:09,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:09,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 20:16:09,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:09,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 20:16:09,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1699, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 20:16:09,607 INFO L87 Difference]: Start difference. First operand 18100 states and 43803 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:29,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:29,307 INFO L93 Difference]: Finished difference Result 27518 states and 64706 transitions. [2022-03-03 20:16:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-03-03 20:16:29,308 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-03 20:16:29,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:29,351 INFO L225 Difference]: With dead ends: 27518 [2022-03-03 20:16:29,351 INFO L226 Difference]: Without dead ends: 27191 [2022-03-03 20:16:29,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 50 SyntacticMatches, 21 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41306 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=13048, Invalid=77252, Unknown=0, NotChecked=0, Total=90300 [2022-03-03 20:16:29,355 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1031 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 2858 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 3887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 565 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:29,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1031 Valid, 514 Invalid, 3887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2858 Invalid, 0 Unknown, 565 Unchecked, 1.6s Time] [2022-03-03 20:16:29,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27191 states. [2022-03-03 20:16:29,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27191 to 18718. [2022-03-03 20:16:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18718 states, 18717 states have (on average 2.421702195864722) internal successors, (45327), 18717 states have internal predecessors, (45327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18718 states to 18718 states and 45327 transitions. [2022-03-03 20:16:29,774 INFO L78 Accepts]: Start accepts. Automaton has 18718 states and 45327 transitions. Word has length 35 [2022-03-03 20:16:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:29,774 INFO L470 AbstractCegarLoop]: Abstraction has 18718 states and 45327 transitions. [2022-03-03 20:16:29,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 18718 states and 45327 transitions. [2022-03-03 20:16:29,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 20:16:29,795 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:29,795 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:16:29,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-03 20:16:29,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:29,996 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:16:29,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:29,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1962410595, now seen corresponding path program 47 times [2022-03-03 20:16:29,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:29,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536452119] [2022-03-03 20:16:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:29,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:30,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:30,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536452119] [2022-03-03 20:16:30,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536452119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:30,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824488828] [2022-03-03 20:16:30,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:16:30,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:30,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:30,298 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:30,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 20:16:30,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 20:16:30,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:30,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-03 20:16:30,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:31,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:32,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824488828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:32,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:32,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-03-03 20:16:32,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377476189] [2022-03-03 20:16:32,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:32,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 20:16:32,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:32,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 20:16:32,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 20:16:32,017 INFO L87 Difference]: Start difference. First operand 18718 states and 45327 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:46,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:46,325 INFO L93 Difference]: Finished difference Result 27149 states and 64467 transitions. [2022-03-03 20:16:46,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-03-03 20:16:46,325 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-03 20:16:46,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:46,375 INFO L225 Difference]: With dead ends: 27149 [2022-03-03 20:16:46,375 INFO L226 Difference]: Without dead ends: 26998 [2022-03-03 20:16:46,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 50 SyntacticMatches, 27 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27364 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=9504, Invalid=48818, Unknown=0, NotChecked=0, Total=58322 [2022-03-03 20:16:46,377 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 841 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 2224 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 3393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 2224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 808 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:46,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 396 Invalid, 3393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 2224 Invalid, 0 Unknown, 808 Unchecked, 1.2s Time] [2022-03-03 20:16:46,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26998 states. [2022-03-03 20:16:46,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26998 to 19461. [2022-03-03 20:16:46,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19461 states, 19460 states have (on average 2.4192702980472767) internal successors, (47079), 19460 states have internal predecessors, (47079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:46,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19461 states to 19461 states and 47079 transitions. [2022-03-03 20:16:46,785 INFO L78 Accepts]: Start accepts. Automaton has 19461 states and 47079 transitions. Word has length 35 [2022-03-03 20:16:46,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:46,786 INFO L470 AbstractCegarLoop]: Abstraction has 19461 states and 47079 transitions. [2022-03-03 20:16:46,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:46,786 INFO L276 IsEmpty]: Start isEmpty. Operand 19461 states and 47079 transitions. [2022-03-03 20:16:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 20:16:46,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:46,854 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:16:46,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-03 20:16:47,054 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,SelfDestructingSolverStorable48 [2022-03-03 20:16:47,054 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:16:47,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:47,054 INFO L85 PathProgramCache]: Analyzing trace with hash 893229107, now seen corresponding path program 48 times [2022-03-03 20:16:47,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:47,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869114866] [2022-03-03 20:16:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:47,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:47,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:47,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869114866] [2022-03-03 20:16:47,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869114866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:47,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531971641] [2022-03-03 20:16:47,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:16:47,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:47,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:47,328 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:47,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 20:16:47,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 20:16:47,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:47,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-03 20:16:47,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:48,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:50,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531971641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:50,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:50,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-03-03 20:16:50,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275104254] [2022-03-03 20:16:50,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:50,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-03 20:16:50,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:50,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-03 20:16:50,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 20:16:50,130 INFO L87 Difference]: Start difference. First operand 19461 states and 47079 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:35,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:35,805 INFO L93 Difference]: Finished difference Result 42567 states and 102196 transitions. [2022-03-03 20:17:35,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2022-03-03 20:17:35,806 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-03 20:17:35,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:35,895 INFO L225 Difference]: With dead ends: 42567 [2022-03-03 20:17:35,895 INFO L226 Difference]: Without dead ends: 42462 [2022-03-03 20:17:35,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 35066 ImplicationChecksByTransitivity, 44.8s TimeCoverageRelationStatistics Valid=12667, Invalid=68843, Unknown=0, NotChecked=0, Total=81510 [2022-03-03 20:17:35,898 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 969 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 3326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 696 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:35,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 459 Invalid, 3326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 2170 Invalid, 0 Unknown, 696 Unchecked, 1.5s Time] [2022-03-03 20:17:35,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42462 states. [2022-03-03 20:17:36,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42462 to 20181. [2022-03-03 20:17:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20181 states, 20180 states have (on average 2.415312190287413) internal successors, (48741), 20180 states have internal predecessors, (48741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20181 states to 20181 states and 48741 transitions. [2022-03-03 20:17:36,522 INFO L78 Accepts]: Start accepts. Automaton has 20181 states and 48741 transitions. Word has length 35 [2022-03-03 20:17:36,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:36,522 INFO L470 AbstractCegarLoop]: Abstraction has 20181 states and 48741 transitions. [2022-03-03 20:17:36,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:36,522 INFO L276 IsEmpty]: Start isEmpty. Operand 20181 states and 48741 transitions. [2022-03-03 20:17:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 20:17:36,545 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:36,545 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:36,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:36,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-03 20:17:36,760 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:17:36,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:36,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1057414301, now seen corresponding path program 49 times [2022-03-03 20:17:36,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:36,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507751805] [2022-03-03 20:17:36,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:36,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:37,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:37,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507751805] [2022-03-03 20:17:37,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507751805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:37,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210764542] [2022-03-03 20:17:37,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:17:37,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:37,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:37,148 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:37,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 20:17:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:37,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-03 20:17:37,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:37,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:38,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210764542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:38,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:38,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-03-03 20:17:38,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99812267] [2022-03-03 20:17:38,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:38,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 20:17:38,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:38,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 20:17:38,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 20:17:38,649 INFO L87 Difference]: Start difference. First operand 20181 states and 48741 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:54,269 INFO L93 Difference]: Finished difference Result 31595 states and 75036 transitions. [2022-03-03 20:17:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2022-03-03 20:17:54,271 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-03 20:17:54,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:54,324 INFO L225 Difference]: With dead ends: 31595 [2022-03-03 20:17:54,325 INFO L226 Difference]: Without dead ends: 31391 [2022-03-03 20:17:54,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 58 SyntacticMatches, 14 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30424 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=10357, Invalid=57503, Unknown=0, NotChecked=0, Total=67860 [2022-03-03 20:17:54,328 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 948 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 3485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:54,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [948 Valid, 634 Invalid, 3485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 2598 Invalid, 0 Unknown, 528 Unchecked, 1.4s Time] [2022-03-03 20:17:54,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31391 states. [2022-03-03 20:17:54,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31391 to 20619. [2022-03-03 20:17:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20619 states, 20618 states have (on average 2.412212629741003) internal successors, (49735), 20618 states have internal predecessors, (49735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20619 states to 20619 states and 49735 transitions. [2022-03-03 20:17:54,756 INFO L78 Accepts]: Start accepts. Automaton has 20619 states and 49735 transitions. Word has length 35 [2022-03-03 20:17:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:54,756 INFO L470 AbstractCegarLoop]: Abstraction has 20619 states and 49735 transitions. [2022-03-03 20:17:54,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:54,757 INFO L276 IsEmpty]: Start isEmpty. Operand 20619 states and 49735 transitions. [2022-03-03 20:17:54,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 20:17:54,776 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:54,776 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:54,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:54,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:54,977 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:17:54,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:54,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1794931811, now seen corresponding path program 50 times [2022-03-03 20:17:54,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:54,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771105813] [2022-03-03 20:17:54,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:54,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:55,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:55,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771105813] [2022-03-03 20:17:55,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771105813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:55,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328311652] [2022-03-03 20:17:55,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:17:55,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:55,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:55,210 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:55,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 20:17:55,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:17:55,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:55,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-03 20:17:55,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:55,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:56,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328311652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:56,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:56,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 17] total 41 [2022-03-03 20:17:56,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293706921] [2022-03-03 20:17:56,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:56,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 20:17:56,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:56,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 20:17:56,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1377, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 20:17:56,975 INFO L87 Difference]: Start difference. First operand 20619 states and 49735 transitions. Second operand has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:04,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:04,667 INFO L93 Difference]: Finished difference Result 31800 states and 75366 transitions. [2022-03-03 20:18:04,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-03 20:18:04,668 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-03 20:18:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:04,721 INFO L225 Difference]: With dead ends: 31800 [2022-03-03 20:18:04,721 INFO L226 Difference]: Without dead ends: 31773 [2022-03-03 20:18:04,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8298 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=4887, Invalid=17165, Unknown=0, NotChecked=0, Total=22052 [2022-03-03 20:18:04,722 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 700 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1828 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:04,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 328 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1828 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:18:04,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31773 states. [2022-03-03 20:18:05,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31773 to 24756. [2022-03-03 20:18:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24756 states, 24755 states have (on average 2.4244395071702685) internal successors, (60017), 24755 states have internal predecessors, (60017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:05,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24756 states to 24756 states and 60017 transitions. [2022-03-03 20:18:05,218 INFO L78 Accepts]: Start accepts. Automaton has 24756 states and 60017 transitions. Word has length 35 [2022-03-03 20:18:05,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:05,218 INFO L470 AbstractCegarLoop]: Abstraction has 24756 states and 60017 transitions. [2022-03-03 20:18:05,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 24756 states and 60017 transitions. [2022-03-03 20:18:05,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 20:18:05,240 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:05,240 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:05,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:05,440 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,SelfDestructingSolverStorable51 [2022-03-03 20:18:05,441 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:05,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:05,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1064565901, now seen corresponding path program 51 times [2022-03-03 20:18:05,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:05,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25069040] [2022-03-03 20:18:05,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:05,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:05,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:05,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25069040] [2022-03-03 20:18:05,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25069040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:05,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853774437] [2022-03-03 20:18:05,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:18:05,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:05,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:05,639 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:18:05,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 20:18:05,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-03 20:18:05,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:05,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-03 20:18:05,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:06,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:07,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853774437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:07,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:07,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 39 [2022-03-03 20:18:07,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168498176] [2022-03-03 20:18:07,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:07,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 20:18:07,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:07,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 20:18:07,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1189, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 20:18:07,283 INFO L87 Difference]: Start difference. First operand 24756 states and 60017 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:10,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:10,791 INFO L93 Difference]: Finished difference Result 33437 states and 81132 transitions. [2022-03-03 20:18:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 20:18:10,792 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-03 20:18:10,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:10,848 INFO L225 Difference]: With dead ends: 33437 [2022-03-03 20:18:10,849 INFO L226 Difference]: Without dead ends: 33429 [2022-03-03 20:18:10,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3962 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3179, Invalid=8811, Unknown=0, NotChecked=0, Total=11990 [2022-03-03 20:18:10,851 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 370 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:10,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 178 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:18:10,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33429 states. [2022-03-03 20:18:11,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33429 to 28374. [2022-03-03 20:18:11,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28374 states, 28373 states have (on average 2.445775913720791) internal successors, (69394), 28373 states have internal predecessors, (69394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:11,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28374 states to 28374 states and 69394 transitions. [2022-03-03 20:18:11,387 INFO L78 Accepts]: Start accepts. Automaton has 28374 states and 69394 transitions. Word has length 35 [2022-03-03 20:18:11,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:11,387 INFO L470 AbstractCegarLoop]: Abstraction has 28374 states and 69394 transitions. [2022-03-03 20:18:11,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:11,387 INFO L276 IsEmpty]: Start isEmpty. Operand 28374 states and 69394 transitions. [2022-03-03 20:18:11,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 20:18:11,408 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:11,408 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:11,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:11,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:11,609 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:11,609 INFO L85 PathProgramCache]: Analyzing trace with hash -968336091, now seen corresponding path program 52 times [2022-03-03 20:18:11,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:11,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94012160] [2022-03-03 20:18:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:11,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:11,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:11,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94012160] [2022-03-03 20:18:11,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94012160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:11,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808350552] [2022-03-03 20:18:11,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:18:11,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:11,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:11,887 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:18:11,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 20:18:11,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:18:11,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:11,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-03 20:18:11,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:12,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:14,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808350552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:14,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:14,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 46 [2022-03-03 20:18:14,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714618186] [2022-03-03 20:18:14,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:14,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 20:18:14,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:14,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 20:18:14,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1683, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 20:18:14,722 INFO L87 Difference]: Start difference. First operand 28374 states and 69394 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:23,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:23,426 INFO L93 Difference]: Finished difference Result 76564 states and 186438 transitions. [2022-03-03 20:19:23,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 380 states. [2022-03-03 20:19:23,427 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-03 20:19:23,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:23,621 INFO L225 Difference]: With dead ends: 76564 [2022-03-03 20:19:23,621 INFO L226 Difference]: Without dead ends: 76431 [2022-03-03 20:19:23,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 78772 ImplicationChecksByTransitivity, 67.0s TimeCoverageRelationStatistics Valid=24736, Invalid=142954, Unknown=0, NotChecked=0, Total=167690 [2022-03-03 20:19:23,627 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1220 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 3390 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 5025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 3390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1108 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:23,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 864 Invalid, 5025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 3390 Invalid, 0 Unknown, 1108 Unchecked, 2.0s Time] [2022-03-03 20:19:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76431 states. [2022-03-03 20:19:24,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76431 to 35789. [2022-03-03 20:19:24,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35789 states, 35788 states have (on average 2.447831675421929) internal successors, (87603), 35788 states have internal predecessors, (87603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35789 states to 35789 states and 87603 transitions. [2022-03-03 20:19:24,912 INFO L78 Accepts]: Start accepts. Automaton has 35789 states and 87603 transitions. Word has length 35 [2022-03-03 20:19:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:24,913 INFO L470 AbstractCegarLoop]: Abstraction has 35789 states and 87603 transitions. [2022-03-03 20:19:24,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 35789 states and 87603 transitions. [2022-03-03 20:19:24,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 20:19:24,943 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:24,943 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:24,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:25,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-03 20:19:25,143 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:19:25,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:25,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1472113377, now seen corresponding path program 53 times [2022-03-03 20:19:25,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:25,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217338379] [2022-03-03 20:19:25,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:25,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:25,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:25,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217338379] [2022-03-03 20:19:25,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217338379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:25,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10998077] [2022-03-03 20:19:25,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:19:25,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:25,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:25,414 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:25,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 20:19:25,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-03 20:19:25,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:25,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:19:25,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:26,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:26,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10998077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:26,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:26,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 39 [2022-03-03 20:19:26,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371636432] [2022-03-03 20:19:26,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:26,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-03 20:19:26,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:26,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-03 20:19:26,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 20:19:26,950 INFO L87 Difference]: Start difference. First operand 35789 states and 87603 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:39,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:39,974 INFO L93 Difference]: Finished difference Result 51166 states and 123889 transitions. [2022-03-03 20:19:39,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-03-03 20:19:39,974 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-03 20:19:39,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:40,114 INFO L225 Difference]: With dead ends: 51166 [2022-03-03 20:19:40,114 INFO L226 Difference]: Without dead ends: 50956 [2022-03-03 20:19:40,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16625 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=5587, Invalid=37885, Unknown=0, NotChecked=0, Total=43472 [2022-03-03 20:19:40,116 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1183 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 2724 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 3245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 2724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:40,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1183 Valid, 567 Invalid, 3245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 2724 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 20:19:40,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50956 states. [2022-03-03 20:19:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50956 to 37796. [2022-03-03 20:19:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37796 states, 37795 states have (on average 2.4284164572033338) internal successors, (91782), 37795 states have internal predecessors, (91782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:41,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37796 states to 37796 states and 91782 transitions. [2022-03-03 20:19:41,085 INFO L78 Accepts]: Start accepts. Automaton has 37796 states and 91782 transitions. Word has length 35 [2022-03-03 20:19:41,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:41,085 INFO L470 AbstractCegarLoop]: Abstraction has 37796 states and 91782 transitions. [2022-03-03 20:19:41,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:41,085 INFO L276 IsEmpty]: Start isEmpty. Operand 37796 states and 91782 transitions. [2022-03-03 20:19:41,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 20:19:41,114 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:41,115 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:41,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:41,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-03 20:19:41,315 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:19:41,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:41,316 INFO L85 PathProgramCache]: Analyzing trace with hash 309882039, now seen corresponding path program 54 times [2022-03-03 20:19:41,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:41,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072838958] [2022-03-03 20:19:41,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:41,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:41,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:41,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072838958] [2022-03-03 20:19:41,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072838958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:41,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730188111] [2022-03-03 20:19:41,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:19:41,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:41,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:41,626 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:41,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 20:19:41,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 20:19:41,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:41,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-03 20:19:41,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:42,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:44,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730188111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:44,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:44,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-03-03 20:19:44,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359783380] [2022-03-03 20:19:44,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:44,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-03 20:19:44,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:44,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-03 20:19:44,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1806, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 20:19:44,665 INFO L87 Difference]: Start difference. First operand 37796 states and 91782 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:44,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:44,120 INFO L93 Difference]: Finished difference Result 64315 states and 154824 transitions. [2022-03-03 20:20:44,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 392 states. [2022-03-03 20:20:44,120 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-03 20:20:44,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:44,252 INFO L225 Difference]: With dead ends: 64315 [2022-03-03 20:20:44,252 INFO L226 Difference]: Without dead ends: 64110 [2022-03-03 20:20:44,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 432 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 88058 ImplicationChecksByTransitivity, 57.8s TimeCoverageRelationStatistics Valid=25719, Invalid=162203, Unknown=0, NotChecked=0, Total=187922 [2022-03-03 20:20:44,259 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1339 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 3555 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 4669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 3555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 491 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:44,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1339 Valid, 896 Invalid, 4669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 3555 Invalid, 0 Unknown, 491 Unchecked, 2.2s Time] [2022-03-03 20:20:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64110 states. [2022-03-03 20:20:45,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64110 to 42957. [2022-03-03 20:20:45,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42957 states, 42956 states have (on average 2.432582177111463) internal successors, (104494), 42956 states have internal predecessors, (104494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:45,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42957 states to 42957 states and 104494 transitions. [2022-03-03 20:20:45,312 INFO L78 Accepts]: Start accepts. Automaton has 42957 states and 104494 transitions. Word has length 35 [2022-03-03 20:20:45,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:45,312 INFO L470 AbstractCegarLoop]: Abstraction has 42957 states and 104494 transitions. [2022-03-03 20:20:45,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:45,312 INFO L276 IsEmpty]: Start isEmpty. Operand 42957 states and 104494 transitions. [2022-03-03 20:20:45,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 20:20:45,343 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:45,343 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:45,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-03 20:20:45,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:45,544 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:20:45,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:45,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1619435289, now seen corresponding path program 55 times [2022-03-03 20:20:45,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:45,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150417814] [2022-03-03 20:20:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:45,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:20:45,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:45,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150417814] [2022-03-03 20:20:45,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150417814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:45,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326380807] [2022-03-03 20:20:45,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:20:45,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:45,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:45,814 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:45,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 20:20:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:45,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-03 20:20:45,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:46,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:47,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326380807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:47,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:47,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-03-03 20:20:47,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756589005] [2022-03-03 20:20:47,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:47,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-03 20:20:47,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:47,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-03 20:20:47,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1536, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 20:20:47,425 INFO L87 Difference]: Start difference. First operand 42957 states and 104494 transitions. Second operand has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 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) [2022-03-03 20:21:02,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:21:02,549 INFO L93 Difference]: Finished difference Result 64001 states and 154506 transitions. [2022-03-03 20:21:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2022-03-03 20:21:02,549 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 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) Word has length 35 [2022-03-03 20:21:02,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:21:02,674 INFO L225 Difference]: With dead ends: 64001 [2022-03-03 20:21:02,674 INFO L226 Difference]: Without dead ends: 63813 [2022-03-03 20:21:02,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 55 SyntacticMatches, 13 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29257 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=10278, Invalid=57062, Unknown=0, NotChecked=0, Total=67340 [2022-03-03 20:21:02,677 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 710 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 3588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 750 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:21:02,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 473 Invalid, 3588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 2564 Invalid, 0 Unknown, 750 Unchecked, 1.3s Time] [2022-03-03 20:21:02,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63813 states. [2022-03-03 20:21:03,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63813 to 43034. [2022-03-03 20:21:03,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43034 states, 43033 states have (on average 2.4317849092556876) internal successors, (104647), 43033 states have internal predecessors, (104647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:03,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43034 states to 43034 states and 104647 transitions. [2022-03-03 20:21:03,834 INFO L78 Accepts]: Start accepts. Automaton has 43034 states and 104647 transitions. Word has length 35 [2022-03-03 20:21:03,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:21:03,834 INFO L470 AbstractCegarLoop]: Abstraction has 43034 states and 104647 transitions. [2022-03-03 20:21:03,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 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) [2022-03-03 20:21:03,835 INFO L276 IsEmpty]: Start isEmpty. Operand 43034 states and 104647 transitions. [2022-03-03 20:21:03,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 20:21:03,864 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:21:03,864 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:21:03,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-03 20:21:04,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:04,064 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:21:04,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:21:04,065 INFO L85 PathProgramCache]: Analyzing trace with hash 830358429, now seen corresponding path program 56 times [2022-03-03 20:21:04,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:21:04,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588257950] [2022-03-03 20:21:04,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:21:04,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:21:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:21:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:21:04,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:21:04,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588257950] [2022-03-03 20:21:04,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588257950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:21:04,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84630800] [2022-03-03 20:21:04,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:21:04,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:04,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:21:04,315 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:21:04,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 20:21:04,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:21:04,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:21:04,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-03 20:21:04,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:21:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:05,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:21:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:05,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84630800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:21:05,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:21:05,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 44 [2022-03-03 20:21:05,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015519627] [2022-03-03 20:21:05,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:21:05,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-03 20:21:05,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:21:05,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-03 20:21:05,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1540, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 20:21:05,891 INFO L87 Difference]: Start difference. First operand 43034 states and 104647 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:23,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:21:23,813 INFO L93 Difference]: Finished difference Result 58311 states and 140194 transitions. [2022-03-03 20:21:23,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2022-03-03 20:21:23,813 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-03 20:21:23,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:21:23,921 INFO L225 Difference]: With dead ends: 58311 [2022-03-03 20:21:23,922 INFO L226 Difference]: Without dead ends: 58065 [2022-03-03 20:21:23,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 54 SyntacticMatches, 19 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34136 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=11952, Invalid=62850, Unknown=0, NotChecked=0, Total=74802 [2022-03-03 20:21:23,924 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 914 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 2914 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 4127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 2914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 801 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:21:23,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 422 Invalid, 4127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 2914 Invalid, 0 Unknown, 801 Unchecked, 1.5s Time] [2022-03-03 20:21:23,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58065 states. Received shutdown request... [2022-03-03 20:21:24,585 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 20:21:24,585 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 20:21:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58065 to 43495. [2022-03-03 20:21:24,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43495 states, 43494 states have (on average 2.4314388191474685) internal successors, (105753), 43494 states have internal predecessors, (105753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:24,789 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-03 20:21:24,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-03 20:21:24,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:24,990 WARN L594 AbstractCegarLoop]: Verification canceled: while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). [2022-03-03 20:21:24,991 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-03 20:21:24,991 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-03 20:21:24,994 INFO L732 BasicCegarLoop]: Path program histogram: [56, 1, 1] [2022-03-03 20:21:24,997 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 20:21:24,997 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 20:21:25,004 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 08:21:25 BasicIcfg [2022-03-03 20:21:25,004 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 20:21:25,004 INFO L158 Benchmark]: Toolchain (without parser) took 744014.29ms. Allocated memory was 204.5MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 163.2MB in the beginning and 809.3MB in the end (delta: -646.1MB). Peak memory consumption was 1.1GB. Max. memory is 8.0GB. [2022-03-03 20:21:25,004 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.18ms. Allocated memory is still 204.5MB. Free memory is still 164.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 20:21:25,008 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.59ms. Allocated memory is still 204.5MB. Free memory was 163.1MB in the beginning and 161.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 20:21:25,009 INFO L158 Benchmark]: Boogie Preprocessor took 13.01ms. Allocated memory is still 204.5MB. Free memory was 161.6MB in the beginning and 160.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 20:21:25,009 INFO L158 Benchmark]: RCFGBuilder took 209.30ms. Allocated memory is still 204.5MB. Free memory was 160.6MB in the beginning and 151.8MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-03 20:21:25,009 INFO L158 Benchmark]: TraceAbstraction took 743764.47ms. Allocated memory was 204.5MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 151.4MB in the beginning and 809.3MB in the end (delta: -657.9MB). Peak memory consumption was 1.1GB. Max. memory is 8.0GB. [2022-03-03 20:21:25,009 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 0.18ms. Allocated memory is still 204.5MB. Free memory is still 164.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.59ms. Allocated memory is still 204.5MB. Free memory was 163.1MB in the beginning and 161.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.01ms. Allocated memory is still 204.5MB. Free memory was 161.6MB in the beginning and 160.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 209.30ms. Allocated memory is still 204.5MB. Free memory was 160.6MB in the beginning and 151.8MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 743764.47ms. Allocated memory was 204.5MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 151.4MB in the beginning and 809.3MB in the end (delta: -657.9MB). Peak memory consumption was 1.1GB. 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: 51]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 743.6s, OverallIterations: 58, TraceHistogramMax: 5, PathProgramHistogramMax: 56, EmptinessCheckTime: 0.6s, AutomataDifference: 633.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 36858 SdHoareTripleChecker+Valid, 46.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 36858 mSDsluCounter, 19319 SdHoareTripleChecker+Invalid, 39.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 12982 IncrementalHoareTripleChecker+Unchecked, 36690 mSDsCounter, 13777 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 87839 IncrementalHoareTripleChecker+Invalid, 114598 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13777 mSolverCounterUnsat, 1119 mSDtfsCounter, 87839 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11363 GetRequests, 2305 SyntacticMatches, 316 SemanticMatches, 8742 ConstructedPredicates, 0 IntricatePredicates, 15 DeprecatedPredicates, 809286 ImplicationChecksByTransitivity, 605.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43034occurred in iteration=57, InterpolantAutomatonStates: 7228, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 12.8s AutomataMinimizationTime, 58 MinimizatonAttempts, 260703 StatesRemovedByMinimization, 57 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 82.4s InterpolantComputationTime, 3412 NumberOfCodeBlocks, 3412 NumberOfCodeBlocksAsserted, 247 NumberOfCheckSat, 4932 ConstructedInterpolants, 95 QuantifiedInterpolants, 91858 SizeOfPredicates, 466 NumberOfNonLiveVariables, 3749 ConjunctsInSsa, 1423 ConjunctsInUnsatCore, 170 InterpolantComputations, 2 PerfectInterpolantSequences, 446/5260 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