/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/two-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:19:57,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:19:57,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:19:57,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:19:57,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:19:57,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:19:57,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:19:57,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:19:57,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:19:57,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:19:57,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:19:57,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:19:57,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:19:57,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:19:57,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:19:57,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:19:57,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:19:57,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:19:57,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:19:57,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:19:57,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:19:57,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:19:57,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:19:57,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:19:57,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 18:19:57,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:19:57,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:19:57,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:19:57,934 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-Delay.epf [2021-08-21 18:19:57,955 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:19:57,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:19:57,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:19:57,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:19:57,956 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:19:57,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:19:57,957 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:19:57,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:19:57,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:19:57,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:19:57,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:19:57,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:19:57,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:19:57,958 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:19:57,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:19:57,958 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:19:57,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:19:57,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:19:57,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:19:57,959 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:19:57,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:19:57,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:19:57,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:19:57,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:19:57,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:19:57,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:19:57,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:19:57,960 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:19:57,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:19:57,960 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:19:57,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:19:58,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:19:58,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:19:58,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:19:58,267 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:19:58,268 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:19:58,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/two-queue.wvr.bpl [2021-08-21 18:19:58,269 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/two-queue.wvr.bpl' [2021-08-21 18:19:58,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:19:58,292 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:19:58,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:19:58,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:19:58,293 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:19:58,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:19:58" (1/1) ... [2021-08-21 18:19:58,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:19:58" (1/1) ... [2021-08-21 18:19:58,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:19:58,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:19:58,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:19:58,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:19:58,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:19:58" (1/1) ... [2021-08-21 18:19:58,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:19:58" (1/1) ... [2021-08-21 18:19:58,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:19:58" (1/1) ... [2021-08-21 18:19:58,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:19:58" (1/1) ... [2021-08-21 18:19:58,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:19:58" (1/1) ... [2021-08-21 18:19:58,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:19:58" (1/1) ... [2021-08-21 18:19:58,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:19:58" (1/1) ... [2021-08-21 18:19:58,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:19:58,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:19:58,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:19:58,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:19:58,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:19:58" (1/1) ... [2021-08-21 18:19:58,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:19:58,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:58,373 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) [2021-08-21 18:19:58,375 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 [2021-08-21 18:19:58,413 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:19:58,413 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:19:58,413 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:19:58,413 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:19:58,414 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:19:58,414 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:19:58,414 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:19:58,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:19:58,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:19:58,415 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 18:19:58,706 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:19:58,706 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:19:58,708 INFO L202 PluginConnector]: Adding new model two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:19:58 BoogieIcfgContainer [2021-08-21 18:19:58,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:19:58,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:19:58,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:19:58,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:19:58,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:19:58" (1/2) ... [2021-08-21 18:19:58,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9ecdbe and model type two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:19:58, skipping insertion in model container [2021-08-21 18:19:58,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:19:58" (2/2) ... [2021-08-21 18:19:58,714 INFO L111 eAbstractionObserver]: Analyzing ICFG two-queue.wvr.bpl [2021-08-21 18:19:58,718 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:19:58,718 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:19:58,718 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:19:58,718 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:19:58,753 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 18:19:58,788 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:19:58,793 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 18:19:58,793 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 18:19:58,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 52 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) [2021-08-21 18:19:58,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 18:19:58,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:58,872 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:58,875 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:58,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:58,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1623898766, now seen corresponding path program 1 times [2021-08-21 18:19:58,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:58,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650895097] [2021-08-21 18:19:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:58,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:59,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:59,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650895097] [2021-08-21 18:19:59,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650895097] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:19:59,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:19:59,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:19:59,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017699765] [2021-08-21 18:19:59,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:19:59,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:59,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:19:59,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:19:59,093 INFO L87 Difference]: Start difference. First operand has 53 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 52 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) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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) [2021-08-21 18:19:59,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:19:59,120 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2021-08-21 18:19:59,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:19:59,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 [2021-08-21 18:19:59,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:19:59,129 INFO L225 Difference]: With dead ends: 74 [2021-08-21 18:19:59,129 INFO L226 Difference]: Without dead ends: 44 [2021-08-21 18:19:59,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:19:59,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-21 18:19:59,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-08-21 18:19:59,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:19:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2021-08-21 18:19:59,156 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 15 [2021-08-21 18:19:59,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:19:59,156 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2021-08-21 18:19:59,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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) [2021-08-21 18:19:59,157 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2021-08-21 18:19:59,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 18:19:59,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:19:59,157 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:19:59,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:19:59,158 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:19:59,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:19:59,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1676546123, now seen corresponding path program 1 times [2021-08-21 18:19:59,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:19:59,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318772310] [2021-08-21 18:19:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:59,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:19:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:59,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:59,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318772310] [2021-08-21 18:19:59,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318772310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:59,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575669980] [2021-08-21 18:19:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:19:59,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:59,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:59,498 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) [2021-08-21 18:19:59,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 18:19:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:59,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:19:59,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:59,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:19:59,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-08-21 18:20:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:00,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575669980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:00,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:00,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 18:20:00,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315520856] [2021-08-21 18:20:00,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:20:00,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:00,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:20:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:20:00,073 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:00,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:00,540 INFO L93 Difference]: Finished difference Result 81 states and 114 transitions. [2021-08-21 18:20:00,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:20:00,541 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 18:20:00,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:00,545 INFO L225 Difference]: With dead ends: 81 [2021-08-21 18:20:00,545 INFO L226 Difference]: Without dead ends: 77 [2021-08-21 18:20:00,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 455.3ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:20:00,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-21 18:20:00,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2021-08-21 18:20:00,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 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) [2021-08-21 18:20:00,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2021-08-21 18:20:00,564 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 19 [2021-08-21 18:20:00,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:00,565 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2021-08-21 18:20:00,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:00,566 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2021-08-21 18:20:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 18:20:00,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:00,568 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:00,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:00,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:00,781 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:00,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:00,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1486085109, now seen corresponding path program 2 times [2021-08-21 18:20:00,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:00,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020759778] [2021-08-21 18:20:00,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:00,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:20:00,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:00,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020759778] [2021-08-21 18:20:00,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020759778] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:20:00,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:20:00,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:20:00,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968826415] [2021-08-21 18:20:00,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:20:00,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:00,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:20:00,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:20:00,807 INFO L87 Difference]: Start difference. First operand 50 states and 70 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:00,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:00,813 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2021-08-21 18:20:00,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:20:00,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 18:20:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:00,814 INFO L225 Difference]: With dead ends: 50 [2021-08-21 18:20:00,814 INFO L226 Difference]: Without dead ends: 48 [2021-08-21 18:20:00,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:20:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-21 18:20:00,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-08-21 18:20:00,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 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) [2021-08-21 18:20:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 65 transitions. [2021-08-21 18:20:00,818 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 65 transitions. Word has length 19 [2021-08-21 18:20:00,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:00,819 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 65 transitions. [2021-08-21 18:20:00,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 65 transitions. [2021-08-21 18:20:00,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 18:20:00,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:00,820 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:00,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 18:20:00,820 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:00,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:00,821 INFO L82 PathProgramCache]: Analyzing trace with hash 432480181, now seen corresponding path program 3 times [2021-08-21 18:20:00,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:00,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708145309] [2021-08-21 18:20:00,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:00,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:01,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:01,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708145309] [2021-08-21 18:20:01,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708145309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:01,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163750614] [2021-08-21 18:20:01,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:20:01,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:01,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:01,089 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) [2021-08-21 18:20:01,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 18:20:01,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:20:01,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:01,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 18:20:01,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:01,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 18:20:01,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:20:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:01,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163750614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:01,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:01,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-21 18:20:01,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854161309] [2021-08-21 18:20:01,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:20:01,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:01,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:20:01,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:20:01,588 INFO L87 Difference]: Start difference. First operand 47 states and 65 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:01,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:01,931 INFO L93 Difference]: Finished difference Result 85 states and 120 transitions. [2021-08-21 18:20:01,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:20:01,931 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 18:20:01,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:01,932 INFO L225 Difference]: With dead ends: 85 [2021-08-21 18:20:01,932 INFO L226 Difference]: Without dead ends: 81 [2021-08-21 18:20:01,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 424.1ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:20:01,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-21 18:20:01,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2021-08-21 18:20:01,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 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) [2021-08-21 18:20:01,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2021-08-21 18:20:01,941 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 19 [2021-08-21 18:20:01,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:01,941 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 66 transitions. [2021-08-21 18:20:01,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:01,943 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 66 transitions. [2021-08-21 18:20:01,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:20:01,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:01,944 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:01,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-21 18:20:02,149 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 [2021-08-21 18:20:02,150 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:02,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:02,150 INFO L82 PathProgramCache]: Analyzing trace with hash 764427832, now seen corresponding path program 4 times [2021-08-21 18:20:02,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:02,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691222822] [2021-08-21 18:20:02,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:02,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:02,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:02,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691222822] [2021-08-21 18:20:02,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691222822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:02,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12841832] [2021-08-21 18:20:02,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:20:02,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:02,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:02,194 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) [2021-08-21 18:20:02,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 18:20:02,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:20:02,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:02,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:20:02,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:20:02,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12841832] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:20:02,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 18:20:02,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-08-21 18:20:02,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580036283] [2021-08-21 18:20:02,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:20:02,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:02,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:20:02,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:20:02,357 INFO L87 Difference]: Start difference. First operand 48 states and 66 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:02,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:02,365 INFO L93 Difference]: Finished difference Result 94 states and 128 transitions. [2021-08-21 18:20:02,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:20:02,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:20:02,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:02,369 INFO L225 Difference]: With dead ends: 94 [2021-08-21 18:20:02,369 INFO L226 Difference]: Without dead ends: 84 [2021-08-21 18:20:02,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:20:02,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-21 18:20:02,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2021-08-21 18:20:02,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.4025974025974026) internal successors, (108), 77 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:02,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 108 transitions. [2021-08-21 18:20:02,375 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 108 transitions. Word has length 23 [2021-08-21 18:20:02,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:02,376 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 108 transitions. [2021-08-21 18:20:02,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:02,376 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 108 transitions. [2021-08-21 18:20:02,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:20:02,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:02,377 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:02,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:02,600 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 [2021-08-21 18:20:02,600 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:02,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:02,601 INFO L82 PathProgramCache]: Analyzing trace with hash 708427896, now seen corresponding path program 5 times [2021-08-21 18:20:02,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:02,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465752856] [2021-08-21 18:20:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:02,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:02,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:02,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465752856] [2021-08-21 18:20:02,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465752856] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:20:02,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:20:02,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:20:02,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494905019] [2021-08-21 18:20:02,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:20:02,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:02,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:20:02,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:20:02,656 INFO L87 Difference]: Start difference. First operand 78 states and 108 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:02,676 INFO L93 Difference]: Finished difference Result 163 states and 222 transitions. [2021-08-21 18:20:02,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:20:02,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:20:02,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:02,678 INFO L225 Difference]: With dead ends: 163 [2021-08-21 18:20:02,678 INFO L226 Difference]: Without dead ends: 163 [2021-08-21 18:20:02,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:20:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-21 18:20:02,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 126. [2021-08-21 18:20:02,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.464) internal successors, (183), 125 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:02,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 183 transitions. [2021-08-21 18:20:02,691 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 183 transitions. Word has length 23 [2021-08-21 18:20:02,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:02,691 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 183 transitions. [2021-08-21 18:20:02,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:02,691 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 183 transitions. [2021-08-21 18:20:02,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:20:02,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:02,692 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:02,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 18:20:02,693 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:02,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:02,693 INFO L82 PathProgramCache]: Analyzing trace with hash 521606523, now seen corresponding path program 6 times [2021-08-21 18:20:02,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:02,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577225618] [2021-08-21 18:20:02,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:02,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:03,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:03,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577225618] [2021-08-21 18:20:03,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577225618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:03,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827177783] [2021-08-21 18:20:03,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:20:03,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:03,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:03,297 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) [2021-08-21 18:20:03,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 18:20:03,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:20:03,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:03,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:20:03,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:03,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:20:03,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:20:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:20:03,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827177783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:03,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:03,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-08-21 18:20:03,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035633946] [2021-08-21 18:20:03,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:20:03,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:03,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:20:03,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:20:03,996 INFO L87 Difference]: Start difference. First operand 126 states and 183 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 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) [2021-08-21 18:20:05,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:05,512 INFO L93 Difference]: Finished difference Result 205 states and 294 transitions. [2021-08-21 18:20:05,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:20:05,513 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 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 27 [2021-08-21 18:20:05,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:05,514 INFO L225 Difference]: With dead ends: 205 [2021-08-21 18:20:05,514 INFO L226 Difference]: Without dead ends: 195 [2021-08-21 18:20:05,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1527.4ms TimeCoverageRelationStatistics Valid=409, Invalid=3497, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:20:05,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-21 18:20:05,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 136. [2021-08-21 18:20:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.474074074074074) internal successors, (199), 135 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 199 transitions. [2021-08-21 18:20:05,524 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 199 transitions. Word has length 27 [2021-08-21 18:20:05,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:05,524 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 199 transitions. [2021-08-21 18:20:05,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 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) [2021-08-21 18:20:05,524 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 199 transitions. [2021-08-21 18:20:05,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:20:05,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:05,526 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:05,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:05,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:05,741 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:05,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1664334469, now seen corresponding path program 7 times [2021-08-21 18:20:05,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:05,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633863930] [2021-08-21 18:20:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:05,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:06,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:06,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633863930] [2021-08-21 18:20:06,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633863930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:06,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194069317] [2021-08-21 18:20:06,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:20:06,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:06,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:06,248 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) [2021-08-21 18:20:06,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 18:20:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:06,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:20:06,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:06,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:06,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:06,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194069317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:06,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:06,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-08-21 18:20:06,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075457671] [2021-08-21 18:20:06,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:20:06,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:06,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:20:06,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:20:06,864 INFO L87 Difference]: Start difference. First operand 136 states and 199 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:07,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:07,782 INFO L93 Difference]: Finished difference Result 216 states and 303 transitions. [2021-08-21 18:20:07,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:20:07,783 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:20:07,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:07,784 INFO L225 Difference]: With dead ends: 216 [2021-08-21 18:20:07,784 INFO L226 Difference]: Without dead ends: 196 [2021-08-21 18:20:07,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 978.5ms TimeCoverageRelationStatistics Valid=281, Invalid=2071, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 18:20:07,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-08-21 18:20:07,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 141. [2021-08-21 18:20:07,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:07,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 207 transitions. [2021-08-21 18:20:07,791 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 207 transitions. Word has length 27 [2021-08-21 18:20:07,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:07,791 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 207 transitions. [2021-08-21 18:20:07,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:07,791 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 207 transitions. [2021-08-21 18:20:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:20:07,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:07,793 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:07,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:08,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:08,001 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:08,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:08,001 INFO L82 PathProgramCache]: Analyzing trace with hash 294259003, now seen corresponding path program 8 times [2021-08-21 18:20:08,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:08,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735539042] [2021-08-21 18:20:08,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:08,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:08,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:08,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735539042] [2021-08-21 18:20:08,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735539042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:08,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516889010] [2021-08-21 18:20:08,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:20:08,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:08,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:08,447 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) [2021-08-21 18:20:08,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 18:20:08,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:20:08,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:08,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:20:08,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:08,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:08,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:09,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516889010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:09,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:09,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 27 [2021-08-21 18:20:09,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672547786] [2021-08-21 18:20:09,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:20:09,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:09,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:20:09,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:20:09,065 INFO L87 Difference]: Start difference. First operand 141 states and 207 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:10,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:10,056 INFO L93 Difference]: Finished difference Result 209 states and 295 transitions. [2021-08-21 18:20:10,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:20:10,056 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:20:10,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:10,057 INFO L225 Difference]: With dead ends: 209 [2021-08-21 18:20:10,057 INFO L226 Difference]: Without dead ends: 205 [2021-08-21 18:20:10,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 955.5ms TimeCoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:20:10,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-21 18:20:10,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 152. [2021-08-21 18:20:10,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4768211920529801) internal successors, (223), 151 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 223 transitions. [2021-08-21 18:20:10,069 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 223 transitions. Word has length 27 [2021-08-21 18:20:10,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:10,069 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 223 transitions. [2021-08-21 18:20:10,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 223 transitions. [2021-08-21 18:20:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:20:10,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:10,071 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:10,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-21 18:20:10,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:10,277 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash 365818261, now seen corresponding path program 9 times [2021-08-21 18:20:10,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:10,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695849471] [2021-08-21 18:20:10,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:10,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:10,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:10,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695849471] [2021-08-21 18:20:10,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695849471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:10,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967876881] [2021-08-21 18:20:10,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:20:10,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:10,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:10,599 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) [2021-08-21 18:20:10,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 18:20:10,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:20:10,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:10,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 18:20:10,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:11,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 18:20:11,297 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:20:11,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 18:20:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:11,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967876881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:11,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:11,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-21 18:20:11,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440941831] [2021-08-21 18:20:11,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:20:11,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:11,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:20:11,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:20:11,419 INFO L87 Difference]: Start difference. First operand 152 states and 223 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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) [2021-08-21 18:20:12,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:12,481 INFO L93 Difference]: Finished difference Result 244 states and 342 transitions. [2021-08-21 18:20:12,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:20:12,482 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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 27 [2021-08-21 18:20:12,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:12,483 INFO L225 Difference]: With dead ends: 244 [2021-08-21 18:20:12,483 INFO L226 Difference]: Without dead ends: 236 [2021-08-21 18:20:12,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1081.9ms TimeCoverageRelationStatistics Valid=303, Invalid=2247, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:20:12,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-08-21 18:20:12,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 182. [2021-08-21 18:20:12,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.4806629834254144) internal successors, (268), 181 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:12,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 268 transitions. [2021-08-21 18:20:12,489 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 268 transitions. Word has length 27 [2021-08-21 18:20:12,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:12,489 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 268 transitions. [2021-08-21 18:20:12,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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) [2021-08-21 18:20:12,489 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 268 transitions. [2021-08-21 18:20:12,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:20:12,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:12,490 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:12,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:12,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:12,713 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:12,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:12,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1981462213, now seen corresponding path program 10 times [2021-08-21 18:20:12,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:12,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023903774] [2021-08-21 18:20:12,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:12,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:12,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:12,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023903774] [2021-08-21 18:20:12,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023903774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:12,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73769927] [2021-08-21 18:20:12,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:20:12,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:12,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:12,992 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) [2021-08-21 18:20:12,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 18:20:13,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:20:13,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:13,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:20:13,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:13,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:13,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:13,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73769927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:13,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:13,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-08-21 18:20:13,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759212363] [2021-08-21 18:20:13,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:20:13,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:13,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:20:13,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:20:13,531 INFO L87 Difference]: Start difference. First operand 182 states and 268 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:13,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:13,829 INFO L93 Difference]: Finished difference Result 227 states and 329 transitions. [2021-08-21 18:20:13,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:20:13,829 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:20:13,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:13,830 INFO L225 Difference]: With dead ends: 227 [2021-08-21 18:20:13,830 INFO L226 Difference]: Without dead ends: 219 [2021-08-21 18:20:13,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 334.4ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:20:13,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-08-21 18:20:13,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 213. [2021-08-21 18:20:13,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.4669811320754718) internal successors, (311), 212 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:13,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 311 transitions. [2021-08-21 18:20:13,836 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 311 transitions. Word has length 27 [2021-08-21 18:20:13,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:13,836 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 311 transitions. [2021-08-21 18:20:13,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 311 transitions. [2021-08-21 18:20:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:20:13,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:13,837 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:13,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-21 18:20:14,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 18:20:14,062 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:14,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:14,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1466595643, now seen corresponding path program 11 times [2021-08-21 18:20:14,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:14,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111425445] [2021-08-21 18:20:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:14,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:14,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:14,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111425445] [2021-08-21 18:20:14,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111425445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:14,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019230710] [2021-08-21 18:20:14,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:20:14,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:14,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:14,396 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) [2021-08-21 18:20:14,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 18:20:14,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:20:14,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:14,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 18:20:14,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:14,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:14,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:15,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019230710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:15,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:15,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-08-21 18:20:15,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407795526] [2021-08-21 18:20:15,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:20:15,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:15,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:20:15,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:20:15,042 INFO L87 Difference]: Start difference. First operand 213 states and 311 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:15,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:15,454 INFO L93 Difference]: Finished difference Result 245 states and 349 transitions. [2021-08-21 18:20:15,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:20:15,454 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 18:20:15,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:15,455 INFO L225 Difference]: With dead ends: 245 [2021-08-21 18:20:15,455 INFO L226 Difference]: Without dead ends: 237 [2021-08-21 18:20:15,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 462.6ms TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:20:15,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-08-21 18:20:15,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 190. [2021-08-21 18:20:15,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.4761904761904763) internal successors, (279), 189 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:15,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 279 transitions. [2021-08-21 18:20:15,460 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 279 transitions. Word has length 27 [2021-08-21 18:20:15,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:15,460 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 279 transitions. [2021-08-21 18:20:15,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:15,461 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 279 transitions. [2021-08-21 18:20:15,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:20:15,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:15,461 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:15,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:15,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:15,677 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:15,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:15,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1900796738, now seen corresponding path program 12 times [2021-08-21 18:20:15,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:15,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728526427] [2021-08-21 18:20:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:15,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:20:15,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:15,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728526427] [2021-08-21 18:20:15,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728526427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:15,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410718168] [2021-08-21 18:20:15,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:20:15,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:15,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:15,726 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) [2021-08-21 18:20:15,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 18:20:15,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:20:15,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:15,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:20:15,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:20:16,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410718168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:16,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:16,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 18:20:16,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935802583] [2021-08-21 18:20:16,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:20:16,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:16,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:20:16,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:20:16,074 INFO L87 Difference]: Start difference. First operand 190 states and 279 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:16,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:16,083 INFO L93 Difference]: Finished difference Result 260 states and 369 transitions. [2021-08-21 18:20:16,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:20:16,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:20:16,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:16,085 INFO L225 Difference]: With dead ends: 260 [2021-08-21 18:20:16,085 INFO L226 Difference]: Without dead ends: 250 [2021-08-21 18:20:16,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:20:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-08-21 18:20:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 204. [2021-08-21 18:20:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.4482758620689655) internal successors, (294), 203 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 294 transitions. [2021-08-21 18:20:16,091 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 294 transitions. Word has length 31 [2021-08-21 18:20:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:16,091 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 294 transitions. [2021-08-21 18:20:16,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:16,091 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 294 transitions. [2021-08-21 18:20:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:20:16,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:16,092 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:16,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-21 18:20:16,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 18:20:16,309 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:16,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:16,309 INFO L82 PathProgramCache]: Analyzing trace with hash -468130050, now seen corresponding path program 13 times [2021-08-21 18:20:16,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:16,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735984047] [2021-08-21 18:20:16,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:16,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:20:16,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:16,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735984047] [2021-08-21 18:20:16,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735984047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:16,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148724156] [2021-08-21 18:20:16,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:20:16,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:16,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:16,363 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) [2021-08-21 18:20:16,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 18:20:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:16,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:20:16,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:20:16,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148724156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:16,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:16,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 18:20:16,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898495404] [2021-08-21 18:20:16,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:20:16,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:16,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:20:16,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:20:16,779 INFO L87 Difference]: Start difference. First operand 204 states and 294 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:16,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:16,788 INFO L93 Difference]: Finished difference Result 150 states and 211 transitions. [2021-08-21 18:20:16,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:20:16,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:20:16,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:16,789 INFO L225 Difference]: With dead ends: 150 [2021-08-21 18:20:16,789 INFO L226 Difference]: Without dead ends: 150 [2021-08-21 18:20:16,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:20:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-21 18:20:16,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 125. [2021-08-21 18:20:16,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.403225806451613) internal successors, (174), 124 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:16,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 174 transitions. [2021-08-21 18:20:16,792 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 174 transitions. Word has length 31 [2021-08-21 18:20:16,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:16,792 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 174 transitions. [2021-08-21 18:20:16,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 174 transitions. [2021-08-21 18:20:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:20:16,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:16,793 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:16,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:17,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 18:20:17,017 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:17,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:17,017 INFO L82 PathProgramCache]: Analyzing trace with hash -415741695, now seen corresponding path program 14 times [2021-08-21 18:20:17,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:17,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300785788] [2021-08-21 18:20:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:17,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:20:17,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:17,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300785788] [2021-08-21 18:20:17,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300785788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:17,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848238615] [2021-08-21 18:20:17,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:20:17,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:17,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:17,373 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) [2021-08-21 18:20:17,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 18:20:17,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:20:17,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:17,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:20:17,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:17,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:17,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:20:18,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848238615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:18,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:18,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-08-21 18:20:18,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839293037] [2021-08-21 18:20:18,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:20:18,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:18,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:20:18,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:20:18,086 INFO L87 Difference]: Start difference. First operand 125 states and 174 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:18,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:18,592 INFO L93 Difference]: Finished difference Result 214 states and 294 transitions. [2021-08-21 18:20:18,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:20:18,593 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:20:18,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:18,594 INFO L225 Difference]: With dead ends: 214 [2021-08-21 18:20:18,594 INFO L226 Difference]: Without dead ends: 206 [2021-08-21 18:20:18,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 501.0ms TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:20:18,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-21 18:20:18,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 151. [2021-08-21 18:20:18,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.4133333333333333) internal successors, (212), 150 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 212 transitions. [2021-08-21 18:20:18,598 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 212 transitions. Word has length 35 [2021-08-21 18:20:18,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:18,598 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 212 transitions. [2021-08-21 18:20:18,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:18,599 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 212 transitions. [2021-08-21 18:20:18,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:20:18,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:18,600 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:18,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:18,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 18:20:18,813 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:18,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:18,813 INFO L82 PathProgramCache]: Analyzing trace with hash -117141955, now seen corresponding path program 15 times [2021-08-21 18:20:18,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:18,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388888151] [2021-08-21 18:20:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:18,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:20:19,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:19,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388888151] [2021-08-21 18:20:19,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388888151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:19,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779399330] [2021-08-21 18:20:19,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:20:19,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:19,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:19,171 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) [2021-08-21 18:20:19,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 18:20:19,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:20:19,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:19,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 18:20:19,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:19,871 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:20:19,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 18:20:20,012 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:20:20,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 18:20:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:20:20,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779399330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:20,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:20,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 18:20:20,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064138779] [2021-08-21 18:20:20,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:20:20,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:20,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:20:20,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:20:20,128 INFO L87 Difference]: Start difference. First operand 151 states and 212 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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) [2021-08-21 18:20:21,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:21,367 INFO L93 Difference]: Finished difference Result 256 states and 341 transitions. [2021-08-21 18:20:21,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:20:21,368 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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 35 [2021-08-21 18:20:21,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:21,369 INFO L225 Difference]: With dead ends: 256 [2021-08-21 18:20:21,369 INFO L226 Difference]: Without dead ends: 248 [2021-08-21 18:20:21,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1260.6ms TimeCoverageRelationStatistics Valid=389, Invalid=2581, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:20:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-21 18:20:21,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 166. [2021-08-21 18:20:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.4181818181818182) internal successors, (234), 165 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 234 transitions. [2021-08-21 18:20:21,374 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 234 transitions. Word has length 35 [2021-08-21 18:20:21,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:21,375 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 234 transitions. [2021-08-21 18:20:21,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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) [2021-08-21 18:20:21,375 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 234 transitions. [2021-08-21 18:20:21,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:20:21,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:21,375 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:21,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:21,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 18:20:21,585 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:21,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:21,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1693284609, now seen corresponding path program 16 times [2021-08-21 18:20:21,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:21,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374913893] [2021-08-21 18:20:21,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:21,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:20:21,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:21,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374913893] [2021-08-21 18:20:21,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374913893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:21,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364388522] [2021-08-21 18:20:21,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:20:21,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:21,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:21,931 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) [2021-08-21 18:20:21,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 18:20:22,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:20:22,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:22,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:20:22,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:22,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:22,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:20:22,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364388522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:22,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:22,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-08-21 18:20:22,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950810792] [2021-08-21 18:20:22,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:20:22,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:22,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:20:22,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:20:22,702 INFO L87 Difference]: Start difference. First operand 166 states and 234 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:23,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:23,324 INFO L93 Difference]: Finished difference Result 229 states and 316 transitions. [2021-08-21 18:20:23,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:20:23,324 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:20:23,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:23,325 INFO L225 Difference]: With dead ends: 229 [2021-08-21 18:20:23,325 INFO L226 Difference]: Without dead ends: 221 [2021-08-21 18:20:23,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 617.5ms TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:20:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-21 18:20:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 175. [2021-08-21 18:20:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.4310344827586208) internal successors, (249), 174 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:23,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 249 transitions. [2021-08-21 18:20:23,330 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 249 transitions. Word has length 35 [2021-08-21 18:20:23,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:23,330 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 249 transitions. [2021-08-21 18:20:23,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:23,330 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 249 transitions. [2021-08-21 18:20:23,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:20:23,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:23,331 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:23,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-21 18:20:23,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:23,553 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:23,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:23,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1410571365, now seen corresponding path program 17 times [2021-08-21 18:20:23,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:23,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776571976] [2021-08-21 18:20:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:23,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:20:23,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:23,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776571976] [2021-08-21 18:20:23,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776571976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:23,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135748043] [2021-08-21 18:20:23,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:20:23,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:23,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:23,959 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) [2021-08-21 18:20:23,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 18:20:24,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:20:24,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:24,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:20:24,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:24,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:24,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:20:24,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135748043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:24,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:24,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-08-21 18:20:24,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196061849] [2021-08-21 18:20:24,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:20:24,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:24,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:20:24,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:20:24,796 INFO L87 Difference]: Start difference. First operand 175 states and 249 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:25,299 INFO L93 Difference]: Finished difference Result 265 states and 370 transitions. [2021-08-21 18:20:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:20:25,299 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:20:25,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:25,300 INFO L225 Difference]: With dead ends: 265 [2021-08-21 18:20:25,300 INFO L226 Difference]: Without dead ends: 257 [2021-08-21 18:20:25,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 652.2ms TimeCoverageRelationStatistics Valid=225, Invalid=1497, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:20:25,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-08-21 18:20:25,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 127. [2021-08-21 18:20:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.4126984126984128) internal successors, (178), 126 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 178 transitions. [2021-08-21 18:20:25,304 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 178 transitions. Word has length 35 [2021-08-21 18:20:25,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:25,304 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 178 transitions. [2021-08-21 18:20:25,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:25,304 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 178 transitions. [2021-08-21 18:20:25,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:20:25,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:25,305 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:25,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-21 18:20:25,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 18:20:25,517 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:25,517 INFO L82 PathProgramCache]: Analyzing trace with hash 399855199, now seen corresponding path program 18 times [2021-08-21 18:20:25,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:25,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116441510] [2021-08-21 18:20:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:25,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:20:25,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:25,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116441510] [2021-08-21 18:20:25,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116441510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:25,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887407098] [2021-08-21 18:20:25,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:20:25,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:25,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:25,889 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) [2021-08-21 18:20:25,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 18:20:26,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:20:26,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:26,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:20:26,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:26,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:26,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:20:26,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887407098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:26,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:26,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 20 [2021-08-21 18:20:26,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103185467] [2021-08-21 18:20:26,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:20:26,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:26,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:20:26,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:20:26,828 INFO L87 Difference]: Start difference. First operand 127 states and 178 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:27,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:27,416 INFO L93 Difference]: Finished difference Result 185 states and 253 transitions. [2021-08-21 18:20:27,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:20:27,416 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:20:27,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:27,417 INFO L225 Difference]: With dead ends: 185 [2021-08-21 18:20:27,417 INFO L226 Difference]: Without dead ends: 177 [2021-08-21 18:20:27,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 625.5ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:20:27,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-08-21 18:20:27,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 94. [2021-08-21 18:20:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.3440860215053763) internal successors, (125), 93 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:27,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2021-08-21 18:20:27,420 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 125 transitions. Word has length 35 [2021-08-21 18:20:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:27,420 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-08-21 18:20:27,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 125 transitions. [2021-08-21 18:20:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:20:27,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:27,421 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:27,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:27,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:27,629 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:27,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:27,629 INFO L82 PathProgramCache]: Analyzing trace with hash -643089215, now seen corresponding path program 19 times [2021-08-21 18:20:27,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:27,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703078987] [2021-08-21 18:20:27,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:27,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:20:27,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:27,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703078987] [2021-08-21 18:20:27,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703078987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:27,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001395909] [2021-08-21 18:20:27,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:20:27,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:27,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:27,977 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) [2021-08-21 18:20:27,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 18:20:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:28,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:20:28,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:28,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:28,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:20:28,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001395909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:28,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:28,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 20 [2021-08-21 18:20:28,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181272804] [2021-08-21 18:20:28,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:20:28,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:28,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:20:28,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:20:28,895 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:29,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:29,610 INFO L93 Difference]: Finished difference Result 123 states and 161 transitions. [2021-08-21 18:20:29,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:20:29,611 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:20:29,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:29,611 INFO L225 Difference]: With dead ends: 123 [2021-08-21 18:20:29,611 INFO L226 Difference]: Without dead ends: 115 [2021-08-21 18:20:29,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 634.3ms TimeCoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:20:29,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-21 18:20:29,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2021-08-21 18:20:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.3255813953488371) internal successors, (114), 86 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 114 transitions. [2021-08-21 18:20:29,614 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 114 transitions. Word has length 35 [2021-08-21 18:20:29,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:29,614 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 114 transitions. [2021-08-21 18:20:29,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:29,614 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 114 transitions. [2021-08-21 18:20:29,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:20:29,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:29,615 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:29,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:29,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:29,816 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:29,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:29,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1376156865, now seen corresponding path program 20 times [2021-08-21 18:20:29,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:29,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233132145] [2021-08-21 18:20:29,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:29,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:30,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:30,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233132145] [2021-08-21 18:20:30,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233132145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:30,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089929815] [2021-08-21 18:20:30,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:20:30,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:30,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:30,180 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) [2021-08-21 18:20:30,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 18:20:30,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:20:30,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:30,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:20:30,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:30,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:31,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:31,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089929815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:31,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:31,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 20 [2021-08-21 18:20:31,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477126461] [2021-08-21 18:20:31,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:20:31,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:31,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:20:31,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:20:31,114 INFO L87 Difference]: Start difference. First operand 87 states and 114 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:31,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:31,469 INFO L93 Difference]: Finished difference Result 117 states and 152 transitions. [2021-08-21 18:20:31,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:20:31,470 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:20:31,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:31,470 INFO L225 Difference]: With dead ends: 117 [2021-08-21 18:20:31,470 INFO L226 Difference]: Without dead ends: 109 [2021-08-21 18:20:31,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 405.7ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:20:31,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-21 18:20:31,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 67. [2021-08-21 18:20:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.303030303030303) internal successors, (86), 66 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2021-08-21 18:20:31,473 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 35 [2021-08-21 18:20:31,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:31,473 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2021-08-21 18:20:31,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2021-08-21 18:20:31,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:20:31,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:31,474 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:31,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:31,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:31,695 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:31,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:31,696 INFO L82 PathProgramCache]: Analyzing trace with hash -262960895, now seen corresponding path program 21 times [2021-08-21 18:20:31,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:31,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677017176] [2021-08-21 18:20:31,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:31,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:20:32,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:32,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677017176] [2021-08-21 18:20:32,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677017176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:32,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443405242] [2021-08-21 18:20:32,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:20:32,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:32,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:32,079 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) [2021-08-21 18:20:32,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 18:20:32,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:20:32,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:32,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:20:32,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:32,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:32,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:20:33,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443405242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:33,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:33,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 24 [2021-08-21 18:20:33,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551284373] [2021-08-21 18:20:33,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:20:33,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:33,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:20:33,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:20:33,107 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-08-21 18:20:33,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:33,643 INFO L93 Difference]: Finished difference Result 173 states and 224 transitions. [2021-08-21 18:20:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:20:33,644 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 35 [2021-08-21 18:20:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:33,645 INFO L225 Difference]: With dead ends: 173 [2021-08-21 18:20:33,645 INFO L226 Difference]: Without dead ends: 165 [2021-08-21 18:20:33,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 675.3ms TimeCoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:20:33,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-08-21 18:20:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 117. [2021-08-21 18:20:33,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.3448275862068966) internal successors, (156), 116 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 156 transitions. [2021-08-21 18:20:33,648 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 156 transitions. Word has length 35 [2021-08-21 18:20:33,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:33,648 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 156 transitions. [2021-08-21 18:20:33,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-08-21 18:20:33,649 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 156 transitions. [2021-08-21 18:20:33,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:20:33,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:33,649 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:33,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:33,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:33,872 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:33,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:33,873 INFO L82 PathProgramCache]: Analyzing trace with hash 35638845, now seen corresponding path program 22 times [2021-08-21 18:20:33,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:33,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315048497] [2021-08-21 18:20:33,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:33,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:20:34,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:34,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315048497] [2021-08-21 18:20:34,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315048497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:34,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655385305] [2021-08-21 18:20:34,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:20:34,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:34,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:34,231 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) [2021-08-21 18:20:34,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 18:20:34,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:20:34,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:34,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:20:34,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:35,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:35,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:20:35,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655385305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:35,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:35,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-08-21 18:20:35,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400207560] [2021-08-21 18:20:35,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:20:35,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:35,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:20:35,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:20:35,279 INFO L87 Difference]: Start difference. First operand 117 states and 156 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:35,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:35,740 INFO L93 Difference]: Finished difference Result 184 states and 241 transitions. [2021-08-21 18:20:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:20:35,741 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:20:35,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:35,742 INFO L225 Difference]: With dead ends: 184 [2021-08-21 18:20:35,742 INFO L226 Difference]: Without dead ends: 176 [2021-08-21 18:20:35,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 13 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 566.0ms TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:20:35,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-08-21 18:20:35,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 125. [2021-08-21 18:20:35,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.3629032258064515) internal successors, (169), 124 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:35,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 169 transitions. [2021-08-21 18:20:35,746 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 169 transitions. Word has length 35 [2021-08-21 18:20:35,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:35,746 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 169 transitions. [2021-08-21 18:20:35,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:35,746 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 169 transitions. [2021-08-21 18:20:35,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:20:35,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:35,747 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:35,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:35,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 18:20:35,963 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:35,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:35,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1846065409, now seen corresponding path program 23 times [2021-08-21 18:20:35,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:35,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699049499] [2021-08-21 18:20:35,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:35,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:35,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:20:36,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:36,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699049499] [2021-08-21 18:20:36,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699049499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:36,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935162735] [2021-08-21 18:20:36,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:20:36,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:36,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:36,339 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) [2021-08-21 18:20:36,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 18:20:36,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:20:36,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:36,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 18:20:36,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:37,807 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:20:37,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 48 [2021-08-21 18:20:37,929 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:20:37,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 19 [2021-08-21 18:20:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:38,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935162735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:38,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:38,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 35 [2021-08-21 18:20:38,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577672681] [2021-08-21 18:20:38,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:20:38,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:38,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:20:38,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:20:38,019 INFO L87 Difference]: Start difference. First operand 125 states and 169 transitions. Second operand has 36 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:39,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:39,767 INFO L93 Difference]: Finished difference Result 276 states and 373 transitions. [2021-08-21 18:20:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 18:20:39,768 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:20:39,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:39,769 INFO L225 Difference]: With dead ends: 276 [2021-08-21 18:20:39,769 INFO L226 Difference]: Without dead ends: 264 [2021-08-21 18:20:39,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 1648.8ms TimeCoverageRelationStatistics Valid=424, Invalid=4688, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 18:20:39,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-08-21 18:20:39,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 180. [2021-08-21 18:20:39,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.3966480446927374) internal successors, (250), 179 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:39,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 250 transitions. [2021-08-21 18:20:39,775 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 250 transitions. Word has length 35 [2021-08-21 18:20:39,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:39,775 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 250 transitions. [2021-08-21 18:20:39,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:39,775 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 250 transitions. [2021-08-21 18:20:39,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:20:39,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:39,776 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:39,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 18:20:39,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 18:20:39,985 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:39,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:39,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1257790565, now seen corresponding path program 24 times [2021-08-21 18:20:39,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:39,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380768791] [2021-08-21 18:20:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:39,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:20:40,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:40,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380768791] [2021-08-21 18:20:40,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380768791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:40,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472466209] [2021-08-21 18:20:40,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:20:40,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:40,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:40,362 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) [2021-08-21 18:20:40,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 18:20:41,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:20:41,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:41,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:20:41,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:41,431 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:20:41,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 18:20:41,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:20:41,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472466209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:41,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:41,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-08-21 18:20:41,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405985461] [2021-08-21 18:20:41,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:20:41,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:41,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:20:41,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:20:41,603 INFO L87 Difference]: Start difference. First operand 180 states and 250 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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) [2021-08-21 18:20:42,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:42,368 INFO L93 Difference]: Finished difference Result 246 states and 333 transitions. [2021-08-21 18:20:42,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:20:42,369 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 35 [2021-08-21 18:20:42,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:42,370 INFO L225 Difference]: With dead ends: 246 [2021-08-21 18:20:42,370 INFO L226 Difference]: Without dead ends: 238 [2021-08-21 18:20:42,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 919.3ms TimeCoverageRelationStatistics Valid=288, Invalid=2162, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:20:42,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-08-21 18:20:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 165. [2021-08-21 18:20:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.3780487804878048) internal successors, (226), 164 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 226 transitions. [2021-08-21 18:20:42,374 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 226 transitions. Word has length 35 [2021-08-21 18:20:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:42,375 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 226 transitions. [2021-08-21 18:20:42,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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) [2021-08-21 18:20:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 226 transitions. [2021-08-21 18:20:42,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:20:42,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:42,375 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:42,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:42,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:42,576 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:42,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:42,576 INFO L82 PathProgramCache]: Analyzing trace with hash -490308415, now seen corresponding path program 25 times [2021-08-21 18:20:42,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:42,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154595208] [2021-08-21 18:20:42,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:42,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:20:42,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:42,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154595208] [2021-08-21 18:20:42,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154595208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:42,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740739488] [2021-08-21 18:20:42,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:20:42,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:42,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:42,992 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) [2021-08-21 18:20:42,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 18:20:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:43,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:20:43,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:44,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:44,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:20:44,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740739488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:44,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:44,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 20 [2021-08-21 18:20:44,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407505488] [2021-08-21 18:20:44,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:20:44,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:44,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:20:44,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:20:44,160 INFO L87 Difference]: Start difference. First operand 165 states and 226 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:44,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:44,503 INFO L93 Difference]: Finished difference Result 204 states and 273 transitions. [2021-08-21 18:20:44,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:20:44,504 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:20:44,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:44,504 INFO L225 Difference]: With dead ends: 204 [2021-08-21 18:20:44,504 INFO L226 Difference]: Without dead ends: 196 [2021-08-21 18:20:44,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 13 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 421.3ms TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:20:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-08-21 18:20:44,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 169. [2021-08-21 18:20:44,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.369047619047619) internal successors, (230), 168 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 230 transitions. [2021-08-21 18:20:44,508 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 230 transitions. Word has length 35 [2021-08-21 18:20:44,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:44,508 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 230 transitions. [2021-08-21 18:20:44,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:44,508 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 230 transitions. [2021-08-21 18:20:44,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:20:44,509 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:44,509 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:44,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:44,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:44,734 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:44,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:44,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1528937665, now seen corresponding path program 26 times [2021-08-21 18:20:44,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:44,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543025329] [2021-08-21 18:20:44,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:44,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:20:45,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:45,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543025329] [2021-08-21 18:20:45,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543025329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:45,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744517381] [2021-08-21 18:20:45,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:20:45,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:45,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:45,041 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) [2021-08-21 18:20:45,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 18:20:45,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:20:45,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:45,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:20:45,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:46,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:46,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:20:46,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744517381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:46,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:46,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-08-21 18:20:46,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42837400] [2021-08-21 18:20:46,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:20:46,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:46,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:20:46,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:20:46,200 INFO L87 Difference]: Start difference. First operand 169 states and 230 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:46,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:46,613 INFO L93 Difference]: Finished difference Result 231 states and 313 transitions. [2021-08-21 18:20:46,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:20:46,613 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:20:46,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:46,614 INFO L225 Difference]: With dead ends: 231 [2021-08-21 18:20:46,614 INFO L226 Difference]: Without dead ends: 223 [2021-08-21 18:20:46,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:20:46,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-21 18:20:46,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 195. [2021-08-21 18:20:46,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.3711340206185567) internal successors, (266), 194 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:46,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 266 transitions. [2021-08-21 18:20:46,618 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 266 transitions. Word has length 35 [2021-08-21 18:20:46,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:46,618 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 266 transitions. [2021-08-21 18:20:46,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:46,618 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 266 transitions. [2021-08-21 18:20:46,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:20:46,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:46,619 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:46,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:46,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 18:20:46,835 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:46,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:46,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1850064479, now seen corresponding path program 27 times [2021-08-21 18:20:46,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:46,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551378337] [2021-08-21 18:20:46,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:46,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:47,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:47,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551378337] [2021-08-21 18:20:47,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551378337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:47,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241761160] [2021-08-21 18:20:47,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:20:47,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:47,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:47,195 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) [2021-08-21 18:20:47,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 18:20:47,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:20:47,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:47,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:20:47,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:48,367 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:20:48,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 18:20:48,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:48,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241761160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:48,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:48,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-08-21 18:20:48,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360093762] [2021-08-21 18:20:48,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:20:48,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:48,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:20:48,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:20:48,545 INFO L87 Difference]: Start difference. First operand 195 states and 266 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:49,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:49,289 INFO L93 Difference]: Finished difference Result 236 states and 320 transitions. [2021-08-21 18:20:49,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:20:49,290 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:20:49,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:49,291 INFO L225 Difference]: With dead ends: 236 [2021-08-21 18:20:49,291 INFO L226 Difference]: Without dead ends: 228 [2021-08-21 18:20:49,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 934.9ms TimeCoverageRelationStatistics Valid=311, Invalid=2139, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:20:49,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-08-21 18:20:49,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 147. [2021-08-21 18:20:49,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.3424657534246576) internal successors, (196), 146 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 196 transitions. [2021-08-21 18:20:49,294 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 196 transitions. Word has length 35 [2021-08-21 18:20:49,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:49,294 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 196 transitions. [2021-08-21 18:20:49,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 196 transitions. [2021-08-21 18:20:49,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:20:49,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:49,295 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:49,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:49,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 18:20:49,509 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:49,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1468601151, now seen corresponding path program 28 times [2021-08-21 18:20:49,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:49,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347768345] [2021-08-21 18:20:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:49,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:20:49,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:49,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347768345] [2021-08-21 18:20:49,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347768345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:49,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021029833] [2021-08-21 18:20:49,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:20:49,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:49,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:49,850 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) [2021-08-21 18:20:49,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 18:20:50,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:20:50,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:50,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:20:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:50,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-08-21 18:20:51,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:20:51,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021029833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:51,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:51,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 20 [2021-08-21 18:20:51,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964943815] [2021-08-21 18:20:51,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:20:51,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:51,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:20:51,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:20:51,159 INFO L87 Difference]: Start difference. First operand 147 states and 196 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:51,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:51,767 INFO L93 Difference]: Finished difference Result 190 states and 250 transitions. [2021-08-21 18:20:51,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:20:51,767 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:20:51,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:51,768 INFO L225 Difference]: With dead ends: 190 [2021-08-21 18:20:51,768 INFO L226 Difference]: Without dead ends: 182 [2021-08-21 18:20:51,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 593.3ms TimeCoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:20:51,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-21 18:20:51,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 113. [2021-08-21 18:20:51,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.3214285714285714) internal successors, (148), 112 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:51,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2021-08-21 18:20:51,771 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 35 [2021-08-21 18:20:51,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:51,771 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2021-08-21 18:20:51,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:51,771 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2021-08-21 18:20:51,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:20:51,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:51,772 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:51,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:51,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 18:20:51,985 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:51,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:51,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1164170887, now seen corresponding path program 29 times [2021-08-21 18:20:51,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:51,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028758732] [2021-08-21 18:20:51,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:51,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:20:52,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:52,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028758732] [2021-08-21 18:20:52,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028758732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:52,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128334235] [2021-08-21 18:20:52,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:20:52,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:52,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:52,401 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) [2021-08-21 18:20:52,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 18:20:53,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:20:53,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:53,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 18:20:53,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:53,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:53,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:53,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128334235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:53,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:53,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 25 [2021-08-21 18:20:53,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52851462] [2021-08-21 18:20:53,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:20:53,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:53,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:20:53,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:20:53,838 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 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) [2021-08-21 18:20:54,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:54,338 INFO L93 Difference]: Finished difference Result 185 states and 243 transitions. [2021-08-21 18:20:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:20:54,339 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 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 43 [2021-08-21 18:20:54,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:54,339 INFO L225 Difference]: With dead ends: 185 [2021-08-21 18:20:54,339 INFO L226 Difference]: Without dead ends: 177 [2021-08-21 18:20:54,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 11 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 673.6ms TimeCoverageRelationStatistics Valid=213, Invalid=1509, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:20:54,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-08-21 18:20:54,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 113. [2021-08-21 18:20:54,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.3214285714285714) internal successors, (148), 112 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:54,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2021-08-21 18:20:54,342 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 43 [2021-08-21 18:20:54,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:54,343 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2021-08-21 18:20:54,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 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) [2021-08-21 18:20:54,343 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2021-08-21 18:20:54,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:20:54,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:54,343 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:54,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-21 18:20:54,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:54,544 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:54,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1462770627, now seen corresponding path program 30 times [2021-08-21 18:20:54,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:54,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311973438] [2021-08-21 18:20:54,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:54,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:20:54,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:54,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311973438] [2021-08-21 18:20:54,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311973438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:54,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531641680] [2021-08-21 18:20:54,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:20:54,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:54,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:54,944 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) [2021-08-21 18:20:54,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 18:20:55,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 18:20:55,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:55,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-21 18:20:55,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:56,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:56,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:20:56,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531641680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:56,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:56,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 20 [2021-08-21 18:20:56,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258741750] [2021-08-21 18:20:56,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:20:56,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:56,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:20:56,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:20:56,401 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:56,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:56,925 INFO L93 Difference]: Finished difference Result 207 states and 277 transitions. [2021-08-21 18:20:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:20:56,926 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:20:56,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:56,926 INFO L225 Difference]: With dead ends: 207 [2021-08-21 18:20:56,926 INFO L226 Difference]: Without dead ends: 199 [2021-08-21 18:20:56,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 611.5ms TimeCoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:20:56,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-21 18:20:56,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 121. [2021-08-21 18:20:56,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3416666666666666) internal successors, (161), 120 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 161 transitions. [2021-08-21 18:20:56,929 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 161 transitions. Word has length 43 [2021-08-21 18:20:56,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:56,929 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 161 transitions. [2021-08-21 18:20:56,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:56,929 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 161 transitions. [2021-08-21 18:20:56,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:20:56,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:56,930 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:56,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 18:20:57,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:57,133 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:57,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:57,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1021770105, now seen corresponding path program 31 times [2021-08-21 18:20:57,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:57,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987610442] [2021-08-21 18:20:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:57,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:20:57,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:57,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987610442] [2021-08-21 18:20:57,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987610442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:57,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826872965] [2021-08-21 18:20:57,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:20:57,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:57,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:57,546 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) [2021-08-21 18:20:57,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 18:20:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:58,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-21 18:20:58,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:58,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:58,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:20:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:20:59,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826872965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:59,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:59,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 20 [2021-08-21 18:20:59,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328034853] [2021-08-21 18:20:59,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:20:59,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:59,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:20:59,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:20:59,065 INFO L87 Difference]: Start difference. First operand 121 states and 161 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:59,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:59,653 INFO L93 Difference]: Finished difference Result 196 states and 268 transitions. [2021-08-21 18:20:59,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:20:59,653 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:20:59,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:59,654 INFO L225 Difference]: With dead ends: 196 [2021-08-21 18:20:59,654 INFO L226 Difference]: Without dead ends: 188 [2021-08-21 18:20:59,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 13 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 654.5ms TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:20:59,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-08-21 18:20:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 130. [2021-08-21 18:20:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.3643410852713178) internal successors, (176), 129 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 176 transitions. [2021-08-21 18:20:59,657 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 176 transitions. Word has length 43 [2021-08-21 18:20:59,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:59,657 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 176 transitions. [2021-08-21 18:20:59,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:20:59,657 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 176 transitions. [2021-08-21 18:20:59,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:20:59,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:59,658 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:59,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-21 18:20:59,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:59,865 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:59,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:59,865 INFO L82 PathProgramCache]: Analyzing trace with hash 169341217, now seen corresponding path program 32 times [2021-08-21 18:20:59,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:59,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668943049] [2021-08-21 18:20:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:59,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:21:00,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:00,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668943049] [2021-08-21 18:21:00,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668943049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:00,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987180248] [2021-08-21 18:21:00,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:21:00,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:00,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:00,312 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) [2021-08-21 18:21:00,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 18:21:01,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:21:01,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:01,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-21 18:21:01,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:01,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:21:01,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:21:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:21:01,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987180248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:01,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:01,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2021-08-21 18:21:01,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878611546] [2021-08-21 18:21:01,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:21:01,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:01,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:21:01,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:21:01,850 INFO L87 Difference]: Start difference. First operand 130 states and 176 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:02,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:02,334 INFO L93 Difference]: Finished difference Result 221 states and 298 transitions. [2021-08-21 18:21:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:21:02,335 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:21:02,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:02,336 INFO L225 Difference]: With dead ends: 221 [2021-08-21 18:21:02,336 INFO L226 Difference]: Without dead ends: 213 [2021-08-21 18:21:02,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 33 SyntacticMatches, 13 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 616.6ms TimeCoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:21:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-08-21 18:21:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 121. [2021-08-21 18:21:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3416666666666666) internal successors, (161), 120 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:02,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 161 transitions. [2021-08-21 18:21:02,339 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 161 transitions. Word has length 43 [2021-08-21 18:21:02,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:02,339 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 161 transitions. [2021-08-21 18:21:02,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 161 transitions. [2021-08-21 18:21:02,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:21:02,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:02,340 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:02,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-21 18:21:02,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 18:21:02,565 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:21:02,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:02,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1979767781, now seen corresponding path program 33 times [2021-08-21 18:21:02,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:02,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701309891] [2021-08-21 18:21:02,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:02,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:21:02,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:02,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701309891] [2021-08-21 18:21:02,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701309891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:02,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954505629] [2021-08-21 18:21:02,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:21:02,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:02,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:02,985 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) [2021-08-21 18:21:02,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 18:21:04,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 18:21:04,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:04,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:21:04,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:04,591 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:21:04,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-21 18:21:04,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:21:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:21:04,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954505629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:04,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:04,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-21 18:21:04,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812020911] [2021-08-21 18:21:04,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:21:04,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:04,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:21:04,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:21:04,767 INFO L87 Difference]: Start difference. First operand 121 states and 161 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:05,635 INFO L93 Difference]: Finished difference Result 187 states and 254 transitions. [2021-08-21 18:21:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:21:05,637 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:21:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:05,637 INFO L225 Difference]: With dead ends: 187 [2021-08-21 18:21:05,637 INFO L226 Difference]: Without dead ends: 179 [2021-08-21 18:21:05,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1094.8ms TimeCoverageRelationStatistics Valid=362, Invalid=2290, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 18:21:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-21 18:21:05,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 113. [2021-08-21 18:21:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.3214285714285714) internal successors, (148), 112 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2021-08-21 18:21:05,640 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 43 [2021-08-21 18:21:05,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:05,640 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2021-08-21 18:21:05,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:05,640 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2021-08-21 18:21:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:21:05,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:05,641 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:05,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:05,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:05,853 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:21:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:05,853 INFO L82 PathProgramCache]: Analyzing trace with hash 936823367, now seen corresponding path program 34 times [2021-08-21 18:21:05,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:05,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211493390] [2021-08-21 18:21:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:05,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:21:06,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:06,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211493390] [2021-08-21 18:21:06,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211493390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:06,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428101607] [2021-08-21 18:21:06,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:21:06,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:06,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:06,255 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) [2021-08-21 18:21:06,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 18:21:07,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:21:07,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:07,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-21 18:21:07,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:07,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:21:07,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 18:21:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:21:07,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428101607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:07,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:07,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2021-08-21 18:21:07,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427572629] [2021-08-21 18:21:07,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:21:07,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:07,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:21:07,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:21:07,911 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:08,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:08,513 INFO L93 Difference]: Finished difference Result 155 states and 206 transitions. [2021-08-21 18:21:08,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:21:08,513 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:21:08,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:08,513 INFO L225 Difference]: With dead ends: 155 [2021-08-21 18:21:08,514 INFO L226 Difference]: Without dead ends: 147 [2021-08-21 18:21:08,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 33 SyntacticMatches, 13 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 673.5ms TimeCoverageRelationStatistics Valid=170, Invalid=1390, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:21:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-21 18:21:08,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 109. [2021-08-21 18:21:08,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.3333333333333333) internal successors, (144), 108 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:08,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 144 transitions. [2021-08-21 18:21:08,516 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 144 transitions. Word has length 43 [2021-08-21 18:21:08,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:08,516 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 144 transitions. [2021-08-21 18:21:08,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 144 transitions. [2021-08-21 18:21:08,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:21:08,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:08,517 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:08,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 18:21:08,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:08,721 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:21:08,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:08,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1338897849, now seen corresponding path program 35 times [2021-08-21 18:21:08,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:08,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447914522] [2021-08-21 18:21:08,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:08,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:21:09,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:09,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447914522] [2021-08-21 18:21:09,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447914522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:09,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909529884] [2021-08-21 18:21:09,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:21:09,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:09,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:09,114 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) [2021-08-21 18:21:09,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 18:21:10,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:21:10,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:10,294 WARN L261 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 80 conjunts are in the unsatisfiable core [2021-08-21 18:21:10,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:11,911 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:21:11,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 71 [2021-08-21 18:21:12,171 INFO L354 Elim1Store]: treesize reduction 296, result has 4.2 percent of original size [2021-08-21 18:21:12,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 60 treesize of output 44 [2021-08-21 18:21:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:12,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909529884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:12,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:12,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 42 [2021-08-21 18:21:12,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466762219] [2021-08-21 18:21:12,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 18:21:12,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:12,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 18:21:12,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1696, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:21:12,279 INFO L87 Difference]: Start difference. First operand 109 states and 144 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 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) [2021-08-21 18:21:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:17,243 INFO L93 Difference]: Finished difference Result 367 states and 504 transitions. [2021-08-21 18:21:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-21 18:21:17,243 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 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 43 [2021-08-21 18:21:17,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:17,243 INFO L225 Difference]: With dead ends: 367 [2021-08-21 18:21:17,243 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 18:21:17,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3715 ImplicationChecksByTransitivity, 4856.1ms TimeCoverageRelationStatistics Valid=883, Invalid=12457, Unknown=0, NotChecked=0, Total=13340 [2021-08-21 18:21:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 18:21:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 18:21:17,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:17,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 18:21:17,245 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2021-08-21 18:21:17,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:17,245 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 18:21:17,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 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) [2021-08-21 18:21:17,245 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 18:21:17,245 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 18:21:17,247 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:21:17,248 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:21:17,248 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:21:17,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 18:21:17,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 18:21:17,463 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:21:17,464 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:21:17,465 INFO L202 PluginConnector]: Adding new model two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:21:17 BasicIcfg [2021-08-21 18:21:17,465 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:21:17,466 INFO L168 Benchmark]: Toolchain (without parser) took 79174.07 ms. Allocated memory was 186.6 MB in the beginning and 587.2 MB in the end (delta: 400.6 MB). Free memory was 167.7 MB in the beginning and 280.2 MB in the end (delta: -112.5 MB). Peak memory consumption was 288.1 MB. Max. memory is 8.0 GB. [2021-08-21 18:21:17,466 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 186.6 MB. Free memory is still 168.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:21:17,466 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.67 ms. Allocated memory is still 186.6 MB. Free memory was 167.5 MB in the beginning and 166.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:21:17,466 INFO L168 Benchmark]: Boogie Preprocessor took 18.75 ms. Allocated memory is still 186.6 MB. Free memory was 166.2 MB in the beginning and 165.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:21:17,467 INFO L168 Benchmark]: RCFGBuilder took 370.08 ms. Allocated memory is still 186.6 MB. Free memory was 165.1 MB in the beginning and 150.7 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-08-21 18:21:17,467 INFO L168 Benchmark]: TraceAbstraction took 78755.49 ms. Allocated memory was 186.6 MB in the beginning and 587.2 MB in the end (delta: 400.6 MB). Free memory was 150.3 MB in the beginning and 280.2 MB in the end (delta: -129.9 MB). Peak memory consumption was 270.3 MB. Max. memory is 8.0 GB. [2021-08-21 18:21:17,468 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 0.16 ms. Allocated memory is still 186.6 MB. Free memory is still 168.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.67 ms. Allocated memory is still 186.6 MB. Free memory was 167.5 MB in the beginning and 166.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.75 ms. Allocated memory is still 186.6 MB. Free memory was 166.2 MB in the beginning and 165.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 370.08 ms. Allocated memory is still 186.6 MB. Free memory was 165.1 MB in the beginning and 150.7 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 78755.49 ms. Allocated memory was 186.6 MB in the beginning and 587.2 MB in the end (delta: 400.6 MB). Free memory was 150.3 MB in the beginning and 280.2 MB in the end (delta: -129.9 MB). Peak memory consumption was 270.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 57, positive: 47, positive conditional: 47, positive unconditional: 0, negative: 10, negative conditional: 10, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 48, positive: 47, positive conditional: 0, positive unconditional: 47, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 48, positive: 47, positive conditional: 0, positive unconditional: 47, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 48, positive: 46, positive conditional: 0, positive unconditional: 46, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 14, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 48, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 48, unknown conditional: 0, unknown unconditional: 48] , Statistics on independence cache: Total cache size (in pairs): 48, Positive cache size: 47, Positive conditional cache size: 0, Positive unconditional cache size: 47, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Independence queries for same thread: 9 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 62]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 78676.9ms, OverallIterations: 36, TraceHistogramMax: 4, EmptinessCheckTime: 29.1ms, AutomataDifference: 24895.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 70.6ms, PartialOrderReductionTime: 58.6ms, HoareTripleCheckerStatistics: 591 SDtfs, 2122 SDslu, 5242 SDs, 0 SdLazy, 17348 SolverSat, 1650 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7958.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2241 GetRequests, 791 SyntacticMatches, 194 SemanticMatches, 1256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14641 ImplicationChecksByTransitivity, 26376.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=213occurred in iteration=11, InterpolantAutomatonStates: 911, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 169.5ms AutomataMinimizationTime, 36 MinimizatonAttempts, 1773 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 166.0ms SsaConstructionTime, 935.5ms SatisfiabilityAnalysisTime, 28163.6ms InterpolantComputationTime, 2279 NumberOfCodeBlocks, 2279 NumberOfCodeBlocksAsserted, 132 NumberOfCheckSat, 2210 ConstructedInterpolants, 22 QuantifiedInterpolants, 27122 SizeOfPredicates, 228 NumberOfNonLiveVariables, 3168 ConjunctsInSsa, 958 ConjunctsInUnsatCore, 69 InterpolantComputations, 4 PerfectInterpolantSequences, 305/1944 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-21 18:21:17,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...