/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/queue-add-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:09:52,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:09:52,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:09:52,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:09:52,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:09:52,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:09:52,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:09:52,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:09:52,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:09:52,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:09:52,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:09:52,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:09:52,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:09:52,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:09:52,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:09:52,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:09:52,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:09:52,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:09:52,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:09:52,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:09:52,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:09:52,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:09:52,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:09:52,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:09:52,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 18:09:52,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:09:52,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:09:52,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:09:52,502 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 18:09:52,516 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:09:52,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:09:52,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:09:52,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:09:52,518 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:09:52,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:09:52,518 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:09:52,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:09:52,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:09:52,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:09:52,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:09:52,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:09:52,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:09:52,519 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:09:52,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:09:52,519 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:09:52,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:09:52,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:09:52,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:09:52,520 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:09:52,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:09:52,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:09:52,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:09:52,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:09:52,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:09:52,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:09:52,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:09:52,521 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:09:52,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:09:52,522 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:09:52,522 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:09:52,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:09:52,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:09:52,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:09:52,805 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:09:52,806 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:09:52,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl [2021-08-21 18:09:52,807 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl' [2021-08-21 18:09:52,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:09:52,829 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:09:52,830 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:09:52,830 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:09:52,830 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:09:52,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:52" (1/1) ... [2021-08-21 18:09:52,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:52" (1/1) ... [2021-08-21 18:09:52,850 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:09:52,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:09:52,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:09:52,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:09:52,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:52" (1/1) ... [2021-08-21 18:09:52,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:52" (1/1) ... [2021-08-21 18:09:52,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:52" (1/1) ... [2021-08-21 18:09:52,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:52" (1/1) ... [2021-08-21 18:09:52,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:52" (1/1) ... [2021-08-21 18:09:52,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:52" (1/1) ... [2021-08-21 18:09:52,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:52" (1/1) ... [2021-08-21 18:09:52,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:09:52,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:09:52,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:09:52,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:09:52,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:52" (1/1) ... [2021-08-21 18:09:52,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:09:52,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:52,906 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 18:09:52,924 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 18:09:52,939 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:09:52,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:09:52,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:09:52,939 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:09:52,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:09:52,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:09:52,939 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:09:52,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:09:52,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:09:52,940 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 18:09:53,088 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:09:53,088 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:09:53,090 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:53 BoogieIcfgContainer [2021-08-21 18:09:53,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:09:53,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:09:53,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:09:53,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:09:53,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:09:52" (1/2) ... [2021-08-21 18:09:53,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78175f41 and model type queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:09:53, skipping insertion in model container [2021-08-21 18:09:53,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:53" (2/2) ... [2021-08-21 18:09:53,095 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2.wvr.bpl [2021-08-21 18:09:53,098 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:09:53,098 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:09:53,098 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:09:53,098 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:09:53,136 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 18:09:53,162 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:09:53,166 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 18:09:53,166 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 18:09:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 75 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:53,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 18:09:53,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:53,275 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:53,276 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:09:53,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:53,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1284111015, now seen corresponding path program 1 times [2021-08-21 18:09:53,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:53,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127558333] [2021-08-21 18:09:53,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:53,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:53,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:53,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127558333] [2021-08-21 18:09:53,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127558333] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:09:53,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:09:53,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:09:53,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977366258] [2021-08-21 18:09:53,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:09:53,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:53,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:09:53,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:09:53,422 INFO L87 Difference]: Start difference. First operand has 76 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 75 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:53,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:53,448 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2021-08-21 18:09:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:09:53,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 18:09:53,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:53,455 INFO L225 Difference]: With dead ends: 84 [2021-08-21 18:09:53,455 INFO L226 Difference]: Without dead ends: 22 [2021-08-21 18:09:53,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:09:53,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-21 18:09:53,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-21 18:09:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 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 18:09:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-08-21 18:09:53,482 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2021-08-21 18:09:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:53,483 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-08-21 18:09:53,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:53,483 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-08-21 18:09:53,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 18:09:53,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:53,484 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 18:09:53,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:09:53,485 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:09:53,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:53,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1363030998, now seen corresponding path program 1 times [2021-08-21 18:09:53,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:53,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894819806] [2021-08-21 18:09:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:53,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:53,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:53,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894819806] [2021-08-21 18:09:53,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894819806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:53,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837238113] [2021-08-21 18:09:53,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:53,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:53,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:53,723 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 18:09:53,724 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 18:09:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:53,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:09:53,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:54,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:54,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837238113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:54,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:54,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-21 18:09:54,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7863473] [2021-08-21 18:09:54,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:09:54,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:54,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:09:54,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:09:54,088 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:54,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:54,242 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-08-21 18:09:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:09:54,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 18:09:54,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:54,243 INFO L225 Difference]: With dead ends: 50 [2021-08-21 18:09:54,243 INFO L226 Difference]: Without dead ends: 46 [2021-08-21 18:09:54,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:09:54,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-21 18:09:54,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-08-21 18:09:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 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 18:09:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-08-21 18:09:54,247 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 19 [2021-08-21 18:09:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:54,247 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-08-21 18:09:54,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:54,248 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-08-21 18:09:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:09:54,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:54,248 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:54,269 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 18:09:54,461 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 18:09:54,462 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:09:54,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:54,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1221867961, now seen corresponding path program 1 times [2021-08-21 18:09:54,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:54,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102392125] [2021-08-21 18:09:54,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:54,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:54,507 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 18:09:54,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:54,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102392125] [2021-08-21 18:09:54,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102392125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:54,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481699823] [2021-08-21 18:09:54,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:54,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:54,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:54,510 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 18:09:54,511 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 18:09:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:54,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:09:54,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:54,619 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 18:09:54,644 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 18:09:54,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481699823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:54,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:54,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:09:54,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49959040] [2021-08-21 18:09:54,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:09:54,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:54,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:09:54,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:09:54,646 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:54,684 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-08-21 18:09:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:09:54,684 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:09:54,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:54,685 INFO L225 Difference]: With dead ends: 38 [2021-08-21 18:09:54,685 INFO L226 Difference]: Without dead ends: 38 [2021-08-21 18:09:54,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:09:54,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-21 18:09:54,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2021-08-21 18:09:54,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:54,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-08-21 18:09:54,687 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2021-08-21 18:09:54,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:54,687 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-08-21 18:09:54,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:54,688 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-08-21 18:09:54,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:09:54,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:54,688 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 18:09:54,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 18:09:54,904 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,SelfDestructingSolverStorable2 [2021-08-21 18:09:54,905 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:09:54,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:54,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1512102867, now seen corresponding path program 2 times [2021-08-21 18:09:54,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:54,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707360137] [2021-08-21 18:09:54,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:54,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:54,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:54,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707360137] [2021-08-21 18:09:54,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707360137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:54,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291412757] [2021-08-21 18:09:54,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:09:54,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:54,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:54,945 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 18:09:54,972 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 18:09:55,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:09:55,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:55,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:09:55,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:55,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291412757] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:09:55,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 18:09:55,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-08-21 18:09:55,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721919262] [2021-08-21 18:09:55,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:09:55,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:55,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:09:55,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:09:55,096 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 18:09:55,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:55,107 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-08-21 18:09:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:09:55,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 18:09:55,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:55,107 INFO L225 Difference]: With dead ends: 42 [2021-08-21 18:09:55,108 INFO L226 Difference]: Without dead ends: 32 [2021-08-21 18:09:55,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:09:55,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-21 18:09:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2021-08-21 18:09:55,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-08-21 18:09:55,110 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2021-08-21 18:09:55,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:55,110 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-08-21 18:09:55,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 18:09:55,110 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-08-21 18:09:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:09:55,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:55,110 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:55,129 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 18:09:55,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:55,327 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:09:55,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:55,328 INFO L82 PathProgramCache]: Analyzing trace with hash 374654922, now seen corresponding path program 2 times [2021-08-21 18:09:55,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:55,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549169035] [2021-08-21 18:09:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:55,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:55,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:55,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549169035] [2021-08-21 18:09:55,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549169035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:55,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226581296] [2021-08-21 18:09:55,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:09:55,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:55,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:55,590 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 18:09:55,612 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 18:09:55,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:09:55,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:55,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:09:55,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:55,974 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 18:09:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:56,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226581296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:56,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:56,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-08-21 18:09:56,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988452904] [2021-08-21 18:09:56,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:09:56,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:56,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:09:56,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:09:56,175 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:56,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:56,477 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-08-21 18:09:56,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:09:56,477 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:09:56,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:56,478 INFO L225 Difference]: With dead ends: 51 [2021-08-21 18:09:56,478 INFO L226 Difference]: Without dead ends: 47 [2021-08-21 18:09:56,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 418.5ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:09:56,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-21 18:09:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-08-21 18:09:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 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 18:09:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-08-21 18:09:56,484 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 26 [2021-08-21 18:09:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:56,484 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-08-21 18:09:56,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-08-21 18:09:56,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:09:56,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:56,484 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:56,505 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 18:09:56,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:56,689 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:09:56,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:56,689 INFO L82 PathProgramCache]: Analyzing trace with hash 538944269, now seen corresponding path program 3 times [2021-08-21 18:09:56,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:56,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743196364] [2021-08-21 18:09:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:56,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:56,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:56,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743196364] [2021-08-21 18:09:56,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743196364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:56,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768924346] [2021-08-21 18:09:56,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:09:56,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:56,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:56,752 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 18:09:56,753 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 18:09:56,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:09:56,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:56,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:09:56,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:56,971 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 18:09:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:56,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768924346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:56,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:56,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-08-21 18:09:56,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828985230] [2021-08-21 18:09:56,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:09:56,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:56,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:09:56,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:09:56,991 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 18:09:57,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:57,093 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-08-21 18:09:57,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:09:57,094 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 29 [2021-08-21 18:09:57,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:57,095 INFO L225 Difference]: With dead ends: 53 [2021-08-21 18:09:57,095 INFO L226 Difference]: Without dead ends: 53 [2021-08-21 18:09:57,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:09:57,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-21 18:09:57,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2021-08-21 18:09:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 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 18:09:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-08-21 18:09:57,097 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 29 [2021-08-21 18:09:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:57,097 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-08-21 18:09:57,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 18:09:57,097 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-08-21 18:09:57,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:09:57,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:57,098 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:57,119 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 18:09:57,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:57,315 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:09:57,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:57,315 INFO L82 PathProgramCache]: Analyzing trace with hash -833925171, now seen corresponding path program 4 times [2021-08-21 18:09:57,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:57,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008024167] [2021-08-21 18:09:57,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:57,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:57,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:57,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008024167] [2021-08-21 18:09:57,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008024167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:57,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290943125] [2021-08-21 18:09:57,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:09:57,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:57,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:57,375 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 18:09:57,376 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 18:09:57,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:09:57,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:57,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:09:57,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:57,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290943125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:57,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:57,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 18:09:57,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933093724] [2021-08-21 18:09:57,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:09:57,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:57,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:09:57,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:09:57,552 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 18:09:57,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:57,567 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-08-21 18:09:57,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:09:57,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 30 [2021-08-21 18:09:57,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:57,571 INFO L225 Difference]: With dead ends: 53 [2021-08-21 18:09:57,571 INFO L226 Difference]: Without dead ends: 39 [2021-08-21 18:09:57,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:09:57,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-21 18:09:57,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-08-21 18:09:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:57,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-08-21 18:09:57,576 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2021-08-21 18:09:57,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:57,576 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-08-21 18:09:57,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 18:09:57,576 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-08-21 18:09:57,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:09:57,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:57,581 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:57,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:09:57,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:57,797 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:09:57,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:57,797 INFO L82 PathProgramCache]: Analyzing trace with hash -186592880, now seen corresponding path program 5 times [2021-08-21 18:09:57,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:57,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508790890] [2021-08-21 18:09:57,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:57,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:58,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:58,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508790890] [2021-08-21 18:09:58,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508790890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:58,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409085916] [2021-08-21 18:09:58,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:09:58,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:58,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:58,221 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 18:09:58,222 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 18:09:58,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:09:58,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:58,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 18:09:58,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:58,764 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 18:09:58,765 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 29 treesize of output 13 [2021-08-21 18:09:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:59,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409085916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:59,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:59,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 26 [2021-08-21 18:09:59,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195904699] [2021-08-21 18:09:59,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:09:59,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:59,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:09:59,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:09:59,020 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:59,468 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2021-08-21 18:09:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:09:59,468 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:09:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:59,469 INFO L225 Difference]: With dead ends: 62 [2021-08-21 18:09:59,469 INFO L226 Difference]: Without dead ends: 58 [2021-08-21 18:09:59,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 647.9ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:09:59,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-21 18:09:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2021-08-21 18:09:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-08-21 18:09:59,472 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 33 [2021-08-21 18:09:59,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:59,472 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-08-21 18:09:59,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-08-21 18:09:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:09:59,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:59,472 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:59,491 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 18:09:59,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:59,689 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:09:59,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:59,689 INFO L82 PathProgramCache]: Analyzing trace with hash 86529261, now seen corresponding path program 6 times [2021-08-21 18:09:59,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:59,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828721929] [2021-08-21 18:09:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:59,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:59,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:59,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828721929] [2021-08-21 18:09:59,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828721929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:59,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767065427] [2021-08-21 18:09:59,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:09:59,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:59,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:59,773 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 18:09:59,774 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 18:09:59,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:09:59,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:59,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:09:59,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:00,081 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 18:10:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:00,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767065427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:00,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:00,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 18:10:00,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467313258] [2021-08-21 18:10:00,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:10:00,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:00,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:10:00,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:10:00,109 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:00,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:00,253 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-08-21 18:10:00,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:10:00,254 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:10:00,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:00,254 INFO L225 Difference]: With dead ends: 60 [2021-08-21 18:10:00,254 INFO L226 Difference]: Without dead ends: 60 [2021-08-21 18:10:00,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:10:00,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-21 18:10:00,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38. [2021-08-21 18:10:00,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:00,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-08-21 18:10:00,256 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2021-08-21 18:10:00,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:00,256 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-08-21 18:10:00,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:00,256 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-08-21 18:10:00,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:10:00,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:00,257 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:00,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 18:10:00,457 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,SelfDestructingSolverStorable8 [2021-08-21 18:10:00,458 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:00,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:00,458 INFO L82 PathProgramCache]: Analyzing trace with hash 277939859, now seen corresponding path program 7 times [2021-08-21 18:10:00,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:00,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358393579] [2021-08-21 18:10:00,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:00,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:00,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:00,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358393579] [2021-08-21 18:10:00,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358393579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:00,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596536725] [2021-08-21 18:10:00,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:10:00,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:00,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:00,529 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 18:10:00,541 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 18:10:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:00,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:10:00,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:00,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596536725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:00,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:00,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 18:10:00,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608474252] [2021-08-21 18:10:00,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:10:00,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:00,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:10:00,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:10:00,814 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:00,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:00,831 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-08-21 18:10:00,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:10:00,832 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:10:00,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:00,832 INFO L225 Difference]: With dead ends: 64 [2021-08-21 18:10:00,832 INFO L226 Difference]: Without dead ends: 46 [2021-08-21 18:10:00,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:10:00,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-21 18:10:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-08-21 18:10:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-08-21 18:10:00,834 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2021-08-21 18:10:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:00,834 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-08-21 18:10:00,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-08-21 18:10:00,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 18:10:00,835 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:00,835 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:00,851 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 18:10:01,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-21 18:10:01,043 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:01,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:01,044 INFO L82 PathProgramCache]: Analyzing trace with hash -528641168, now seen corresponding path program 8 times [2021-08-21 18:10:01,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:01,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837642662] [2021-08-21 18:10:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:01,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:01,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:01,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837642662] [2021-08-21 18:10:01,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837642662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:01,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868114377] [2021-08-21 18:10:01,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:10:01,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:01,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:01,625 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 18:10:01,627 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 18:10:01,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:10:01,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:01,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:10:01,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:02,533 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-21 18:10:02,533 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 42 treesize of output 18 [2021-08-21 18:10:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:02,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868114377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:02,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:02,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 33 [2021-08-21 18:10:02,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934489383] [2021-08-21 18:10:02,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 18:10:02,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:02,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 18:10:02,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1031, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:10:02,747 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 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 18:10:03,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:03,422 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-08-21 18:10:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:10:03,423 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 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 40 [2021-08-21 18:10:03,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:03,423 INFO L225 Difference]: With dead ends: 73 [2021-08-21 18:10:03,423 INFO L226 Difference]: Without dead ends: 69 [2021-08-21 18:10:03,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 963.1ms TimeCoverageRelationStatistics Valid=168, Invalid=1812, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:10:03,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-21 18:10:03,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-08-21 18:10:03,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 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 18:10:03,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-08-21 18:10:03,428 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 40 [2021-08-21 18:10:03,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:03,428 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-08-21 18:10:03,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 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 18:10:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-08-21 18:10:03,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:10:03,428 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:03,428 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:03,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 18:10:03,637 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,SelfDestructingSolverStorable10 [2021-08-21 18:10:03,637 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:03,637 INFO L82 PathProgramCache]: Analyzing trace with hash 958004595, now seen corresponding path program 9 times [2021-08-21 18:10:03,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:03,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471904394] [2021-08-21 18:10:03,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:03,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:03,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:03,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471904394] [2021-08-21 18:10:03,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471904394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:03,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173532398] [2021-08-21 18:10:03,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:10:03,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:03,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:03,745 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 18:10:03,772 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 18:10:04,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:10:04,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:04,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:10:04,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:04,184 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 18:10:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:04,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173532398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:04,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:04,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 18:10:04,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807430529] [2021-08-21 18:10:04,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:10:04,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:04,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:10:04,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:10:04,203 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:04,378 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2021-08-21 18:10:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:10:04,378 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:10:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:04,379 INFO L225 Difference]: With dead ends: 71 [2021-08-21 18:10:04,379 INFO L226 Difference]: Without dead ends: 71 [2021-08-21 18:10:04,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:10:04,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-21 18:10:04,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 45. [2021-08-21 18:10:04,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 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 18:10:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-08-21 18:10:04,381 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2021-08-21 18:10:04,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:04,381 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-08-21 18:10:04,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:04,382 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-08-21 18:10:04,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 18:10:04,382 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:04,382 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:04,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-21 18:10:04,588 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,SelfDestructingSolverStorable11 [2021-08-21 18:10:04,589 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:04,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:04,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2050611315, now seen corresponding path program 10 times [2021-08-21 18:10:04,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:04,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798783202] [2021-08-21 18:10:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:04,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:04,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:04,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798783202] [2021-08-21 18:10:04,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798783202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:04,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820022520] [2021-08-21 18:10:04,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:10:04,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:04,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:04,639 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 18:10:04,639 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 18:10:04,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:10:04,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:04,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:10:04,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:05,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820022520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:05,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:05,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 18:10:05,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021982950] [2021-08-21 18:10:05,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:10:05,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:05,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:10:05,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:10:05,036 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 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 18:10:05,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:05,058 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-08-21 18:10:05,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:10:05,059 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 18:10:05,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:05,059 INFO L225 Difference]: With dead ends: 75 [2021-08-21 18:10:05,059 INFO L226 Difference]: Without dead ends: 53 [2021-08-21 18:10:05,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:10:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-21 18:10:05,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-08-21 18:10:05,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 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 18:10:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-08-21 18:10:05,066 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2021-08-21 18:10:05,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:05,066 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-08-21 18:10:05,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 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 18:10:05,067 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-08-21 18:10:05,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 18:10:05,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:05,067 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:05,087 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 18:10:05,280 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,SelfDestructingSolverStorable12 [2021-08-21 18:10:05,281 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:05,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:05,281 INFO L82 PathProgramCache]: Analyzing trace with hash -88373002, now seen corresponding path program 11 times [2021-08-21 18:10:05,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:05,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671089240] [2021-08-21 18:10:05,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:05,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:06,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:06,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671089240] [2021-08-21 18:10:06,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671089240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:06,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616994207] [2021-08-21 18:10:06,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:10:06,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:06,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:06,098 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 18:10:06,099 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 18:10:06,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:10:06,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:06,399 WARN L261 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-21 18:10:06,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:07,415 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:10:07,416 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 50 treesize of output 22 [2021-08-21 18:10:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:07,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616994207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:07,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:07,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 40 [2021-08-21 18:10:07,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063246404] [2021-08-21 18:10:07,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:10:07,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:07,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:10:07,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1531, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:10:07,666 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:08,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:08,640 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2021-08-21 18:10:08,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:10:08,640 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 18:10:08,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:08,641 INFO L225 Difference]: With dead ends: 84 [2021-08-21 18:10:08,641 INFO L226 Difference]: Without dead ends: 80 [2021-08-21 18:10:08,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1449.2ms TimeCoverageRelationStatistics Valid=200, Invalid=2662, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:10:08,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-21 18:10:08,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2021-08-21 18:10:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 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 18:10:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-08-21 18:10:08,644 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 47 [2021-08-21 18:10:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:08,644 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-08-21 18:10:08,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-08-21 18:10:08,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 18:10:08,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:08,644 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:08,665 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 18:10:08,856 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,SelfDestructingSolverStorable13 [2021-08-21 18:10:08,857 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:08,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:08,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1859610003, now seen corresponding path program 12 times [2021-08-21 18:10:08,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:08,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124171002] [2021-08-21 18:10:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:08,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:08,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:08,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124171002] [2021-08-21 18:10:08,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124171002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:08,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644676415] [2021-08-21 18:10:08,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:10:08,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:08,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:08,978 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 18:10:08,980 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 18:10:09,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:10:09,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:09,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:10:09,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:09,548 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 18:10:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:09,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644676415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:09,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:09,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-21 18:10:09,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515130825] [2021-08-21 18:10:09,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:10:09,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:09,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:10:09,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:10:09,568 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 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 18:10:09,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:09,794 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2021-08-21 18:10:09,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:10:09,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-21 18:10:09,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:09,795 INFO L225 Difference]: With dead ends: 82 [2021-08-21 18:10:09,795 INFO L226 Difference]: Without dead ends: 82 [2021-08-21 18:10:09,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 212.6ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:10:09,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-21 18:10:09,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2021-08-21 18:10:09,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 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 18:10:09,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-08-21 18:10:09,797 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2021-08-21 18:10:09,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:09,797 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-08-21 18:10:09,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 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 18:10:09,797 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-08-21 18:10:09,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 18:10:09,798 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:09,798 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:09,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 18:10:10,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:10,001 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:10,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:10,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1311401223, now seen corresponding path program 13 times [2021-08-21 18:10:10,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:10,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59736759] [2021-08-21 18:10:10,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:10,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 66 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:10,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:10,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59736759] [2021-08-21 18:10:10,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59736759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:10,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113325631] [2021-08-21 18:10:10,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:10:10,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:10,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:10,077 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 18:10:10,078 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 18:10:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:10,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 18:10:10,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 66 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:10,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113325631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:10,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:10,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 18:10:10,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826553725] [2021-08-21 18:10:10,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:10:10,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:10,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:10:10,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:10:10,616 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:10,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:10,636 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2021-08-21 18:10:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:10:10,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-21 18:10:10,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:10,636 INFO L225 Difference]: With dead ends: 86 [2021-08-21 18:10:10,636 INFO L226 Difference]: Without dead ends: 60 [2021-08-21 18:10:10,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:10:10,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-21 18:10:10,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-08-21 18:10:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 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 18:10:10,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-08-21 18:10:10,638 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2021-08-21 18:10:10,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:10,638 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-08-21 18:10:10,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:10,638 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-08-21 18:10:10,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-21 18:10:10,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:10,639 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:10,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 18:10:10,852 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,SelfDestructingSolverStorable15 [2021-08-21 18:10:10,853 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:10,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:10,854 INFO L82 PathProgramCache]: Analyzing trace with hash -985145066, now seen corresponding path program 14 times [2021-08-21 18:10:10,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:10,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879647170] [2021-08-21 18:10:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:10,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:11,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:11,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879647170] [2021-08-21 18:10:11,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879647170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:11,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550407132] [2021-08-21 18:10:11,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:10:11,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:11,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:11,937 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 18:10:11,938 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 18:10:12,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:10:12,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:12,375 WARN L261 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-21 18:10:12,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:13,812 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-08-21 18:10:13,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 26 [2021-08-21 18:10:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:14,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550407132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:14,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:14,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 28] total 47 [2021-08-21 18:10:14,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000441244] [2021-08-21 18:10:14,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 18:10:14,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:14,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 18:10:14,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2129, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:10:14,082 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 47 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:15,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:15,432 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2021-08-21 18:10:15,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:10:15,433 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 47 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-21 18:10:15,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:15,433 INFO L225 Difference]: With dead ends: 95 [2021-08-21 18:10:15,433 INFO L226 Difference]: Without dead ends: 91 [2021-08-21 18:10:15,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 2013.9ms TimeCoverageRelationStatistics Valid=232, Invalid=3674, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:10:15,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-21 18:10:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2021-08-21 18:10:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 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 18:10:15,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-08-21 18:10:15,435 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 54 [2021-08-21 18:10:15,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:15,436 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-08-21 18:10:15,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 47 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-08-21 18:10:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 18:10:15,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:15,436 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:15,454 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 18:10:15,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 18:10:15,645 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:15,645 INFO L82 PathProgramCache]: Analyzing trace with hash -998962727, now seen corresponding path program 15 times [2021-08-21 18:10:15,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:15,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478942456] [2021-08-21 18:10:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:15,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:15,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:15,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478942456] [2021-08-21 18:10:15,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478942456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:15,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065890330] [2021-08-21 18:10:15,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:10:15,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:15,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:15,811 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 18:10:15,812 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 18:10:16,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 18:10:16,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:16,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:10:16,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:16,542 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 18:10:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:16,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065890330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:16,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:16,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-21 18:10:16,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724010626] [2021-08-21 18:10:16,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:10:16,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:16,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:10:16,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:10:16,560 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:16,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:16,848 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2021-08-21 18:10:16,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:10:16,848 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 18:10:16,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:16,849 INFO L225 Difference]: With dead ends: 93 [2021-08-21 18:10:16,849 INFO L226 Difference]: Without dead ends: 93 [2021-08-21 18:10:16,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:10:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-21 18:10:16,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 59. [2021-08-21 18:10:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 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 18:10:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-08-21 18:10:16,851 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 57 [2021-08-21 18:10:16,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:16,851 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-08-21 18:10:16,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:16,851 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-08-21 18:10:16,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-21 18:10:16,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:16,851 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:16,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-21 18:10:17,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 18:10:17,059 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:17,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:17,060 INFO L82 PathProgramCache]: Analyzing trace with hash 809034521, now seen corresponding path program 16 times [2021-08-21 18:10:17,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:17,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859443632] [2021-08-21 18:10:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:17,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 91 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:17,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:17,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859443632] [2021-08-21 18:10:17,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859443632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:17,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841477608] [2021-08-21 18:10:17,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:10:17,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:17,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:17,124 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 18:10:17,125 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 18:10:17,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:10:17,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:17,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 18:10:17,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 91 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:17,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841477608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:17,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:17,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 18:10:17,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581124997] [2021-08-21 18:10:17,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:10:17,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:17,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:10:17,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:10:17,836 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 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 18:10:17,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:17,858 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2021-08-21 18:10:17,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:10:17,858 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 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 58 [2021-08-21 18:10:17,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:17,858 INFO L225 Difference]: With dead ends: 97 [2021-08-21 18:10:17,858 INFO L226 Difference]: Without dead ends: 67 [2021-08-21 18:10:17,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:10:17,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-21 18:10:17,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2021-08-21 18:10:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 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 18:10:17,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-08-21 18:10:17,860 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 58 [2021-08-21 18:10:17,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:17,860 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-08-21 18:10:17,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 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 18:10:17,860 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-08-21 18:10:17,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:10:17,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:17,860 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:17,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-21 18:10:18,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:18,077 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:18,077 INFO L82 PathProgramCache]: Analyzing trace with hash 256766556, now seen corresponding path program 17 times [2021-08-21 18:10:18,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:18,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737615406] [2021-08-21 18:10:18,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:18,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:19,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:19,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737615406] [2021-08-21 18:10:19,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737615406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:19,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362582869] [2021-08-21 18:10:19,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:10:19,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:19,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:19,481 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 18:10:19,485 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 18:10:20,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 18:10:20,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:20,083 WARN L261 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 80 conjunts are in the unsatisfiable core [2021-08-21 18:10:20,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:21,980 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-08-21 18:10:21,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 74 treesize of output 30 [2021-08-21 18:10:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:22,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362582869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:22,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:22,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 32] total 54 [2021-08-21 18:10:22,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085413357] [2021-08-21 18:10:22,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-21 18:10:22,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:22,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-21 18:10:22,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2825, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:10:22,271 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 0 states have call successors, (0), 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 18:10:24,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:24,121 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2021-08-21 18:10:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:10:24,121 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:10:24,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:24,122 INFO L225 Difference]: With dead ends: 106 [2021-08-21 18:10:24,122 INFO L226 Difference]: Without dead ends: 102 [2021-08-21 18:10:24,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 2694.8ms TimeCoverageRelationStatistics Valid=264, Invalid=4848, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 18:10:24,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-21 18:10:24,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2021-08-21 18:10:24,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-08-21 18:10:24,125 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 61 [2021-08-21 18:10:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:24,125 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-08-21 18:10:24,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 0 states have call successors, (0), 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 18:10:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-08-21 18:10:24,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-21 18:10:24,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:24,125 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:24,143 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 18:10:24,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:24,337 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:24,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:24,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1661532217, now seen corresponding path program 18 times [2021-08-21 18:10:24,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:24,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309678336] [2021-08-21 18:10:24,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:24,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:24,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:24,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309678336] [2021-08-21 18:10:24,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309678336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:24,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167072723] [2021-08-21 18:10:24,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:10:24,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:24,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:24,544 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 18:10:24,544 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 18:10:25,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 18:10:25,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:25,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:10:25,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:25,521 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 18:10:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:25,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167072723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:25,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:25,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-08-21 18:10:25,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112281897] [2021-08-21 18:10:25,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:10:25,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:25,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:10:25,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:10:25,539 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 18:10:25,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:25,898 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2021-08-21 18:10:25,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:10:25,898 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 64 [2021-08-21 18:10:25,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:25,899 INFO L225 Difference]: With dead ends: 104 [2021-08-21 18:10:25,899 INFO L226 Difference]: Without dead ends: 104 [2021-08-21 18:10:25,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 386.9ms TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:10:25,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-21 18:10:25,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 66. [2021-08-21 18:10:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-08-21 18:10:25,901 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2021-08-21 18:10:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:25,901 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-08-21 18:10:25,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 18:10:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-08-21 18:10:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 18:10:25,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:25,901 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:25,922 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 18:10:26,112 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,SelfDestructingSolverStorable20 [2021-08-21 18:10:26,113 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:26,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:26,113 INFO L82 PathProgramCache]: Analyzing trace with hash -89595553, now seen corresponding path program 19 times [2021-08-21 18:10:26,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:26,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616314965] [2021-08-21 18:10:26,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:26,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 120 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:26,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:26,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616314965] [2021-08-21 18:10:26,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616314965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:26,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382152373] [2021-08-21 18:10:26,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:10:26,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:26,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:26,182 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 18:10:26,204 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 18:10:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:26,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:10:26,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 120 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:27,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382152373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:27,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:27,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 18:10:27,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966107977] [2021-08-21 18:10:27,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:10:27,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:27,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:10:27,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:10:27,134 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:27,155 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-08-21 18:10:27,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:10:27,155 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-21 18:10:27,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:27,156 INFO L225 Difference]: With dead ends: 108 [2021-08-21 18:10:27,156 INFO L226 Difference]: Without dead ends: 74 [2021-08-21 18:10:27,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:10:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-21 18:10:27,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2021-08-21 18:10:27,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 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 18:10:27,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-08-21 18:10:27,157 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 65 [2021-08-21 18:10:27,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:27,157 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-08-21 18:10:27,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:27,157 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-08-21 18:10:27,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-08-21 18:10:27,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:27,158 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:27,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 18:10:27,376 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,SelfDestructingSolverStorable21 [2021-08-21 18:10:27,376 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:27,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:27,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1266921660, now seen corresponding path program 20 times [2021-08-21 18:10:27,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:27,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292318124] [2021-08-21 18:10:27,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:27,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:29,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:29,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292318124] [2021-08-21 18:10:29,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292318124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:29,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447599437] [2021-08-21 18:10:29,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:10:29,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:29,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:29,126 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 18:10:29,128 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 18:10:29,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:10:29,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:29,931 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 94 conjunts are in the unsatisfiable core [2021-08-21 18:10:29,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:32,430 INFO L354 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2021-08-21 18:10:32,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 90 treesize of output 34 [2021-08-21 18:10:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:32,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447599437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:32,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:32,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 36] total 61 [2021-08-21 18:10:32,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244605212] [2021-08-21 18:10:32,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-08-21 18:10:32,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:32,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-21 18:10:32,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3619, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:10:32,731 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 62 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 61 states have internal predecessors, (107), 0 states have call successors, (0), 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 18:10:35,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:35,141 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2021-08-21 18:10:35,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 18:10:35,142 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 61 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-08-21 18:10:35,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:35,142 INFO L225 Difference]: With dead ends: 117 [2021-08-21 18:10:35,142 INFO L226 Difference]: Without dead ends: 113 [2021-08-21 18:10:35,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 42 SyntacticMatches, 9 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 3522.9ms TimeCoverageRelationStatistics Valid=296, Invalid=6184, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 18:10:35,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-21 18:10:35,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2021-08-21 18:10:35,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-08-21 18:10:35,145 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 68 [2021-08-21 18:10:35,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:35,145 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-08-21 18:10:35,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 61 states have internal predecessors, (107), 0 states have call successors, (0), 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 18:10:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-08-21 18:10:35,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-21 18:10:35,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:35,145 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:35,164 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 18:10:35,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:35,349 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:35,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:35,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1923926079, now seen corresponding path program 21 times [2021-08-21 18:10:35,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:35,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379852611] [2021-08-21 18:10:35,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:35,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:35,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:35,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379852611] [2021-08-21 18:10:35,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379852611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:35,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120977970] [2021-08-21 18:10:35,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:10:35,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:35,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:35,561 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 18:10:35,577 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 18:10:36,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 18:10:36,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:36,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 18:10:36,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:36,849 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 18:10:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:36,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120977970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:36,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:36,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-08-21 18:10:36,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675057082] [2021-08-21 18:10:36,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:10:36,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:36,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:10:36,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:10:36,867 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:37,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:37,320 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2021-08-21 18:10:37,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:10:37,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-08-21 18:10:37,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:37,321 INFO L225 Difference]: With dead ends: 115 [2021-08-21 18:10:37,321 INFO L226 Difference]: Without dead ends: 115 [2021-08-21 18:10:37,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 453.2ms TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:10:37,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-21 18:10:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 73. [2021-08-21 18:10:37,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:37,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-08-21 18:10:37,323 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2021-08-21 18:10:37,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:37,323 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-08-21 18:10:37,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:37,323 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-08-21 18:10:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 18:10:37,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:37,324 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:37,346 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 18:10:37,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:37,545 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:37,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1894223937, now seen corresponding path program 22 times [2021-08-21 18:10:37,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:37,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042051937] [2021-08-21 18:10:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:37,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 153 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:37,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:37,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042051937] [2021-08-21 18:10:37,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042051937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:37,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473552746] [2021-08-21 18:10:37,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:10:37,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:37,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:37,636 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 18:10:37,637 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 18:10:38,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:10:38,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:38,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:10:38,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 153 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:38,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473552746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:38,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:38,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 18:10:38,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159899686] [2021-08-21 18:10:38,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:10:38,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:38,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:10:38,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:10:38,859 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:38,885 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2021-08-21 18:10:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:10:38,886 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 18:10:38,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:38,886 INFO L225 Difference]: With dead ends: 119 [2021-08-21 18:10:38,886 INFO L226 Difference]: Without dead ends: 81 [2021-08-21 18:10:38,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:10:38,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-21 18:10:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2021-08-21 18:10:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 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 18:10:38,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-08-21 18:10:38,888 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2021-08-21 18:10:38,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:38,888 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-08-21 18:10:38,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:38,888 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-08-21 18:10:38,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 18:10:38,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:38,888 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:38,908 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 18:10:39,106 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,SelfDestructingSolverStorable24 [2021-08-21 18:10:39,106 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:39,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1158942146, now seen corresponding path program 23 times [2021-08-21 18:10:39,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:39,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575414748] [2021-08-21 18:10:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:39,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:41,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:41,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575414748] [2021-08-21 18:10:41,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575414748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:41,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181858632] [2021-08-21 18:10:41,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:10:41,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:41,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:41,309 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 18:10:41,337 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 18:10:42,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 18:10:42,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:42,392 WARN L261 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 104 conjunts are in the unsatisfiable core [2021-08-21 18:10:42,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:45,532 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-08-21 18:10:45,532 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 98 treesize of output 38 [2021-08-21 18:10:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:45,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181858632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:45,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:45,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 40] total 68 [2021-08-21 18:10:45,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168386866] [2021-08-21 18:10:45,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-08-21 18:10:45,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:45,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-08-21 18:10:45,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=4511, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 18:10:45,854 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 69 states, 69 states have (on average 1.710144927536232) internal successors, (118), 68 states have internal predecessors, (118), 0 states have call successors, (0), 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 18:10:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:48,804 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2021-08-21 18:10:48,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 18:10:48,805 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.710144927536232) internal successors, (118), 68 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 18:10:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:48,806 INFO L225 Difference]: With dead ends: 128 [2021-08-21 18:10:48,806 INFO L226 Difference]: Without dead ends: 124 [2021-08-21 18:10:48,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 46 SyntacticMatches, 10 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 4553.1ms TimeCoverageRelationStatistics Valid=328, Invalid=7682, Unknown=0, NotChecked=0, Total=8010 [2021-08-21 18:10:48,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-21 18:10:48,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 87. [2021-08-21 18:10:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:48,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-08-21 18:10:48,809 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 75 [2021-08-21 18:10:48,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:48,809 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-08-21 18:10:48,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.710144927536232) internal successors, (118), 68 states have internal predecessors, (118), 0 states have call successors, (0), 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 18:10:48,809 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-08-21 18:10:48,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-21 18:10:48,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:48,809 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:48,829 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 18:10:49,016 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,SelfDestructingSolverStorable25 [2021-08-21 18:10:49,017 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:49,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:49,017 INFO L82 PathProgramCache]: Analyzing trace with hash -787673889, now seen corresponding path program 24 times [2021-08-21 18:10:49,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:49,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137077562] [2021-08-21 18:10:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:49,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:49,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:49,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137077562] [2021-08-21 18:10:49,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137077562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:49,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028295325] [2021-08-21 18:10:49,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:10:49,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:49,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:49,273 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 18:10:49,289 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 18:10:50,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 18:10:50,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:50,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:10:50,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:50,851 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 18:10:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:50,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028295325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:50,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:50,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-08-21 18:10:50,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588844258] [2021-08-21 18:10:50,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:10:50,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:50,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:10:50,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:10:50,873 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:51,397 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2021-08-21 18:10:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:10:51,398 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-08-21 18:10:51,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:51,398 INFO L225 Difference]: With dead ends: 126 [2021-08-21 18:10:51,398 INFO L226 Difference]: Without dead ends: 126 [2021-08-21 18:10:51,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 547.5ms TimeCoverageRelationStatistics Valid=261, Invalid=1545, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:10:51,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-21 18:10:51,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2021-08-21 18:10:51,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-08-21 18:10:51,400 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 78 [2021-08-21 18:10:51,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:51,401 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-08-21 18:10:51,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:51,401 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-08-21 18:10:51,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-21 18:10:51,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:51,401 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:51,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-21 18:10:51,601 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,SelfDestructingSolverStorable26 [2021-08-21 18:10:51,602 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:51,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:51,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1602673093, now seen corresponding path program 25 times [2021-08-21 18:10:51,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:51,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851475994] [2021-08-21 18:10:51,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:51,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 190 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:51,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:51,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851475994] [2021-08-21 18:10:51,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851475994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:51,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533408] [2021-08-21 18:10:51,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:10:51,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:51,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:51,725 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 18:10:51,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 18:10:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:53,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:10:53,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 190 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:53,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:53,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:53,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 18:10:53,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058890062] [2021-08-21 18:10:53,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:10:53,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:53,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:10:53,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:10:53,255 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 12 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:53,291 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2021-08-21 18:10:53,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:10:53,291 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 12 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-08-21 18:10:53,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:53,292 INFO L225 Difference]: With dead ends: 130 [2021-08-21 18:10:53,292 INFO L226 Difference]: Without dead ends: 88 [2021-08-21 18:10:53,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:10:53,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-21 18:10:53,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2021-08-21 18:10:53,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:53,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-08-21 18:10:53,294 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 79 [2021-08-21 18:10:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:53,294 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-08-21 18:10:53,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 12 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-08-21 18:10:53,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-21 18:10:53,294 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:53,294 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:53,314 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 18:10:53,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 18:10:53,509 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:53,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:53,509 INFO L82 PathProgramCache]: Analyzing trace with hash 981533282, now seen corresponding path program 26 times [2021-08-21 18:10:53,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:53,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692550922] [2021-08-21 18:10:53,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:53,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:56,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:56,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692550922] [2021-08-21 18:10:56,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692550922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:56,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283024541] [2021-08-21 18:10:56,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:10:56,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:56,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:56,221 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 18:10:56,221 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 18:10:57,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:10:57,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:57,570 WARN L261 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 118 conjunts are in the unsatisfiable core [2021-08-21 18:10:57,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:01,426 INFO L354 Elim1Store]: treesize reduction 432, result has 0.2 percent of original size [2021-08-21 18:11:01,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 114 treesize of output 42 [2021-08-21 18:11:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:01,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283024541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:01,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:01,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 44] total 75 [2021-08-21 18:11:01,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640680230] [2021-08-21 18:11:01,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-08-21 18:11:01,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:01,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-08-21 18:11:01,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=5501, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 18:11:01,788 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 76 states, 76 states have (on average 1.6973684210526316) internal successors, (129), 75 states have internal predecessors, (129), 0 states have call successors, (0), 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 18:11:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:05,400 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2021-08-21 18:11:05,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 18:11:05,400 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.6973684210526316) internal successors, (129), 75 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-08-21 18:11:05,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:05,401 INFO L225 Difference]: With dead ends: 139 [2021-08-21 18:11:05,401 INFO L226 Difference]: Without dead ends: 135 [2021-08-21 18:11:05,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 5609.5ms TimeCoverageRelationStatistics Valid=360, Invalid=9342, Unknown=0, NotChecked=0, Total=9702 [2021-08-21 18:11:05,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-21 18:11:05,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 94. [2021-08-21 18:11:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 states have internal predecessors, (96), 0 states have call successors, (0), 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 18:11:05,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2021-08-21 18:11:05,403 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 82 [2021-08-21 18:11:05,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:05,403 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2021-08-21 18:11:05,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.6973684210526316) internal successors, (129), 75 states have internal predecessors, (129), 0 states have call successors, (0), 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 18:11:05,404 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2021-08-21 18:11:05,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-21 18:11:05,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:05,404 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:05,424 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 18:11:05,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 18:11:05,617 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:05,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:05,617 INFO L82 PathProgramCache]: Analyzing trace with hash -675465051, now seen corresponding path program 27 times [2021-08-21 18:11:05,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:05,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887962178] [2021-08-21 18:11:05,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:05,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:05,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:05,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887962178] [2021-08-21 18:11:05,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887962178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:05,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970681279] [2021-08-21 18:11:05,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:11:05,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:05,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:05,908 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 18:11:05,909 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 18:11:07,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-21 18:11:07,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:07,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 18:11:07,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:07,838 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 18:11:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:07,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970681279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:07,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:07,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-08-21 18:11:07,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672315421] [2021-08-21 18:11:07,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:11:07,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:07,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:11:07,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:11:07,858 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:08,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:08,475 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2021-08-21 18:11:08,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:11:08,476 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-21 18:11:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:08,476 INFO L225 Difference]: With dead ends: 137 [2021-08-21 18:11:08,476 INFO L226 Difference]: Without dead ends: 137 [2021-08-21 18:11:08,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 648.0ms TimeCoverageRelationStatistics Valid=303, Invalid=1859, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:11:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-21 18:11:08,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 87. [2021-08-21 18:11:08,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 0 states have call successors, (0), 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 18:11:08,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-08-21 18:11:08,478 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 85 [2021-08-21 18:11:08,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:08,478 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-08-21 18:11:08,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:08,478 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-08-21 18:11:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-21 18:11:08,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:08,479 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:08,500 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 18:11:08,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:08,685 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:08,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:08,685 INFO L82 PathProgramCache]: Analyzing trace with hash 908623461, now seen corresponding path program 28 times [2021-08-21 18:11:08,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:08,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982690179] [2021-08-21 18:11:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:08,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 231 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:08,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:08,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982690179] [2021-08-21 18:11:08,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982690179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:08,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197572543] [2021-08-21 18:11:08,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:11:08,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:08,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:08,789 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 18:11:08,836 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 18:11:10,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:11:10,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:10,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 18:11:10,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 231 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:10,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197572543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:10,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:10,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 18:11:10,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554269] [2021-08-21 18:11:10,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:11:10,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:10,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:11:10,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:11:10,681 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 13 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:10,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:10,710 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2021-08-21 18:11:10,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:11:10,711 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 13 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-08-21 18:11:10,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:10,711 INFO L225 Difference]: With dead ends: 141 [2021-08-21 18:11:10,711 INFO L226 Difference]: Without dead ends: 95 [2021-08-21 18:11:10,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:11:10,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-08-21 18:11:10,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2021-08-21 18:11:10,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 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 18:11:10,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-08-21 18:11:10,713 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 86 [2021-08-21 18:11:10,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:10,713 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-08-21 18:11:10,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 13 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:10,713 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-08-21 18:11:10,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-08-21 18:11:10,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:10,713 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:10,734 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 18:11:10,921 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,SelfDestructingSolverStorable30 [2021-08-21 18:11:10,921 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:10,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:10,921 INFO L82 PathProgramCache]: Analyzing trace with hash -771106008, now seen corresponding path program 29 times [2021-08-21 18:11:10,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:10,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199323108] [2021-08-21 18:11:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:10,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:14,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:14,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199323108] [2021-08-21 18:11:14,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199323108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:14,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818611029] [2021-08-21 18:11:14,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:11:14,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:14,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:14,211 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 18:11:14,212 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 18:11:15,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-21 18:11:15,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:15,912 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 128 conjunts are in the unsatisfiable core [2021-08-21 18:11:15,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:20,596 INFO L354 Elim1Store]: treesize reduction 522, result has 0.2 percent of original size [2021-08-21 18:11:20,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 122 treesize of output 46 [2021-08-21 18:11:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:20,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818611029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:20,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:20,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 48] total 82 [2021-08-21 18:11:20,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289166338] [2021-08-21 18:11:20,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-08-21 18:11:20,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:20,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-08-21 18:11:20,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=6589, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 18:11:20,973 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 83 states, 83 states have (on average 1.6867469879518073) internal successors, (140), 82 states have internal predecessors, (140), 0 states have call successors, (0), 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 18:11:25,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:25,829 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2021-08-21 18:11:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 18:11:25,829 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.6867469879518073) internal successors, (140), 82 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-08-21 18:11:25,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:25,830 INFO L225 Difference]: With dead ends: 150 [2021-08-21 18:11:25,830 INFO L226 Difference]: Without dead ends: 146 [2021-08-21 18:11:25,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 54 SyntacticMatches, 12 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 6945.3ms TimeCoverageRelationStatistics Valid=392, Invalid=11164, Unknown=0, NotChecked=0, Total=11556 [2021-08-21 18:11:25,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-21 18:11:25,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2021-08-21 18:11:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2021-08-21 18:11:25,832 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 89 [2021-08-21 18:11:25,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:25,832 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2021-08-21 18:11:25,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.6867469879518073) internal successors, (140), 82 states have internal predecessors, (140), 0 states have call successors, (0), 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 18:11:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2021-08-21 18:11:25,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-08-21 18:11:25,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:25,833 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:25,854 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 18:11:26,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:26,037 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:26,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:26,037 INFO L82 PathProgramCache]: Analyzing trace with hash -927751291, now seen corresponding path program 30 times [2021-08-21 18:11:26,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:26,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807463837] [2021-08-21 18:11:26,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:26,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:26,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:26,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807463837] [2021-08-21 18:11:26,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807463837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:26,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005388410] [2021-08-21 18:11:26,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:11:26,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:26,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:26,386 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 18:11:26,387 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 18:11:28,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-21 18:11:28,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:28,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 18:11:28,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:28,739 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 18:11:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:28,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005388410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:28,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:28,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-08-21 18:11:28,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400512471] [2021-08-21 18:11:28,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:11:28,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:28,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:11:28,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:11:28,757 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:29,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:29,510 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2021-08-21 18:11:29,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:11:29,511 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-08-21 18:11:29,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:29,511 INFO L225 Difference]: With dead ends: 148 [2021-08-21 18:11:29,511 INFO L226 Difference]: Without dead ends: 148 [2021-08-21 18:11:29,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 804.7ms TimeCoverageRelationStatistics Valid=348, Invalid=2202, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:11:29,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-08-21 18:11:29,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 94. [2021-08-21 18:11:29,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:29,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2021-08-21 18:11:29,513 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2021-08-21 18:11:29,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:29,513 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2021-08-21 18:11:29,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:29,514 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2021-08-21 18:11:29,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-08-21 18:11:29,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:29,514 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:29,536 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 18:11:29,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:29,725 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:29,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:29,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1200913365, now seen corresponding path program 31 times [2021-08-21 18:11:29,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:29,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452453289] [2021-08-21 18:11:29,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:29,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 276 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:29,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:29,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452453289] [2021-08-21 18:11:29,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452453289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:29,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019546936] [2021-08-21 18:11:29,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:11:29,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:29,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:29,866 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 18:11:29,867 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 18:11:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:31,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:11:31,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 276 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:32,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019546936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:32,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:32,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 18:11:32,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976697637] [2021-08-21 18:11:32,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:11:32,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:32,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:11:32,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:11:32,203 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 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 18:11:32,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:32,237 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2021-08-21 18:11:32,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:11:32,237 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-08-21 18:11:32,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:32,238 INFO L225 Difference]: With dead ends: 152 [2021-08-21 18:11:32,238 INFO L226 Difference]: Without dead ends: 102 [2021-08-21 18:11:32,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:11:32,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-21 18:11:32,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2021-08-21 18:11:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 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 18:11:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-08-21 18:11:32,239 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 93 [2021-08-21 18:11:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:32,239 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-08-21 18:11:32,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 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 18:11:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-08-21 18:11:32,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:11:32,240 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:32,240 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:32,262 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 18:11:32,450 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,SelfDestructingSolverStorable33 [2021-08-21 18:11:32,450 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:32,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:32,450 INFO L82 PathProgramCache]: Analyzing trace with hash 974116360, now seen corresponding path program 32 times [2021-08-21 18:11:32,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:32,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538675492] [2021-08-21 18:11:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:32,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:36,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:36,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538675492] [2021-08-21 18:11:36,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538675492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:36,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435121070] [2021-08-21 18:11:36,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:11:36,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:36,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:36,462 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:11:36,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 18:11:38,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:11:38,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:38,564 WARN L261 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 142 conjunts are in the unsatisfiable core [2021-08-21 18:11:38,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:44,301 INFO L354 Elim1Store]: treesize reduction 660, result has 0.2 percent of original size [2021-08-21 18:11:44,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 138 treesize of output 50 [2021-08-21 18:11:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:44,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435121070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:44,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:44,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 52] total 89 [2021-08-21 18:11:44,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167088892] [2021-08-21 18:11:44,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-08-21 18:11:44,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:44,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-08-21 18:11:44,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=7775, Unknown=0, NotChecked=0, Total=8010 [2021-08-21 18:11:44,711 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 90 states, 90 states have (on average 1.6777777777777778) internal successors, (151), 89 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:50,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:50,185 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2021-08-21 18:11:50,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 18:11:50,185 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.6777777777777778) internal successors, (151), 89 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:11:50,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:50,186 INFO L225 Difference]: With dead ends: 161 [2021-08-21 18:11:50,186 INFO L226 Difference]: Without dead ends: 157 [2021-08-21 18:11:50,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 58 SyntacticMatches, 13 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2564 ImplicationChecksByTransitivity, 8433.5ms TimeCoverageRelationStatistics Valid=424, Invalid=13148, Unknown=0, NotChecked=0, Total=13572 [2021-08-21 18:11:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-21 18:11:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 108. [2021-08-21 18:11:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 0 states have call successors, (0), 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 18:11:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2021-08-21 18:11:50,188 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 96 [2021-08-21 18:11:50,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:50,188 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2021-08-21 18:11:50,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.6777777777777778) internal successors, (151), 89 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2021-08-21 18:11:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-08-21 18:11:50,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:50,189 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:50,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:50,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-21 18:11:50,409 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:50,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:50,409 INFO L82 PathProgramCache]: Analyzing trace with hash -886940917, now seen corresponding path program 33 times [2021-08-21 18:11:50,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:50,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016716294] [2021-08-21 18:11:50,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:50,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:50,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:50,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016716294] [2021-08-21 18:11:50,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016716294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:50,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996534908] [2021-08-21 18:11:50,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:11:50,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:50,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:50,840 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:11:50,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 18:11:53,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-21 18:11:53,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:53,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 18:11:53,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:53,672 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 18:11:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:53,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996534908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:53,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:53,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2021-08-21 18:11:53,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142112921] [2021-08-21 18:11:53,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:11:53,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:53,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:11:53,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:11:53,690 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 28 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 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 18:11:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:54,580 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2021-08-21 18:11:54,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:11:54,580 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-08-21 18:11:54,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:54,581 INFO L225 Difference]: With dead ends: 159 [2021-08-21 18:11:54,581 INFO L226 Difference]: Without dead ends: 159 [2021-08-21 18:11:54,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 970.2ms TimeCoverageRelationStatistics Valid=396, Invalid=2574, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:11:54,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-08-21 18:11:54,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 101. [2021-08-21 18:11:54,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 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 18:11:54,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-08-21 18:11:54,583 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 99 [2021-08-21 18:11:54,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:54,583 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-08-21 18:11:54,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.5357142857142856) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 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 18:11:54,583 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-08-21 18:11:54,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-21 18:11:54,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:54,583 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:54,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:54,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 18:11:54,784 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:54,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:54,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1698238219, now seen corresponding path program 34 times [2021-08-21 18:11:54,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:54,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574752137] [2021-08-21 18:11:54,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:54,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 325 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:54,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:54,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574752137] [2021-08-21 18:11:54,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574752137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:54,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483180511] [2021-08-21 18:11:54,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:11:54,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:54,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:54,926 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:11:54,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 18:11:57,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:11:57,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:57,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:11:57,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 325 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:57,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483180511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:57,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:57,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 18:11:57,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450809726] [2021-08-21 18:11:57,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:11:57,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:57,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:11:57,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:11:57,722 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 15 states have internal predecessors, (106), 0 states have call successors, (0), 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 18:11:57,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:57,759 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2021-08-21 18:11:57,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:11:57,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 15 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-21 18:11:57,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:57,760 INFO L225 Difference]: With dead ends: 163 [2021-08-21 18:11:57,760 INFO L226 Difference]: Without dead ends: 109 [2021-08-21 18:11:57,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:11:57,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-21 18:11:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2021-08-21 18:11:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 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 18:11:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2021-08-21 18:11:57,761 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 100 [2021-08-21 18:11:57,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:57,761 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2021-08-21 18:11:57,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 15 states have internal predecessors, (106), 0 states have call successors, (0), 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 18:11:57,762 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2021-08-21 18:11:57,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-08-21 18:11:57,762 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:57,762 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:57,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-21 18:11:57,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:57,973 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:57,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:57,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1873500814, now seen corresponding path program 35 times [2021-08-21 18:11:57,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:57,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392104733] [2021-08-21 18:11:57,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:57,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:02,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:02,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392104733] [2021-08-21 18:12:02,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392104733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:02,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862933574] [2021-08-21 18:12:02,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:12:02,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:02,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:02,634 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:12:02,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 18:12:05,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-08-21 18:12:05,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:05,179 WARN L261 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 152 conjunts are in the unsatisfiable core [2021-08-21 18:12:05,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:12,043 INFO L354 Elim1Store]: treesize reduction 770, result has 0.1 percent of original size [2021-08-21 18:12:12,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 146 treesize of output 54 [2021-08-21 18:12:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:12,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862933574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:12,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:12,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 56] total 96 [2021-08-21 18:12:12,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080403981] [2021-08-21 18:12:12,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-08-21 18:12:12,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:12,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-08-21 18:12:12,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=9059, Unknown=0, NotChecked=0, Total=9312 [2021-08-21 18:12:12,481 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 97 states, 97 states have (on average 1.6701030927835052) internal successors, (162), 96 states have internal predecessors, (162), 0 states have call successors, (0), 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 18:12:18,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:18,923 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2021-08-21 18:12:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 18:12:18,923 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.6701030927835052) internal successors, (162), 96 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-08-21 18:12:18,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:18,924 INFO L225 Difference]: With dead ends: 172 [2021-08-21 18:12:18,924 INFO L226 Difference]: Without dead ends: 168 [2021-08-21 18:12:18,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 62 SyntacticMatches, 14 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2971 ImplicationChecksByTransitivity, 10092.2ms TimeCoverageRelationStatistics Valid=456, Invalid=15294, Unknown=0, NotChecked=0, Total=15750 [2021-08-21 18:12:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-08-21 18:12:18,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 115. [2021-08-21 18:12:18,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0263157894736843) internal successors, (117), 114 states have internal predecessors, (117), 0 states have call successors, (0), 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 18:12:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2021-08-21 18:12:18,927 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 103 [2021-08-21 18:12:18,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:18,927 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2021-08-21 18:12:18,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.6701030927835052) internal successors, (162), 96 states have internal predecessors, (162), 0 states have call successors, (0), 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 18:12:18,927 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2021-08-21 18:12:18,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-21 18:12:18,927 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:18,927 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:18,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:19,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 18:12:19,133 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:19,133 INFO L82 PathProgramCache]: Analyzing trace with hash 441236523, now seen corresponding path program 36 times [2021-08-21 18:12:19,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:19,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169184221] [2021-08-21 18:12:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:19,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:19,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:19,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169184221] [2021-08-21 18:12:19,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169184221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:19,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623404478] [2021-08-21 18:12:19,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:12:19,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:19,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:19,565 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:12:19,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 18:12:22,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-08-21 18:12:22,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:22,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-21 18:12:22,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:22,998 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 18:12:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:23,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623404478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:23,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:23,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-08-21 18:12:23,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721589449] [2021-08-21 18:12:23,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:12:23,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:23,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:12:23,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:12:23,018 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 29 states have internal predecessors, (106), 0 states have call successors, (0), 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 18:12:23,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:23,992 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2021-08-21 18:12:23,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:12:23,992 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 29 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-08-21 18:12:23,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:23,993 INFO L225 Difference]: With dead ends: 170 [2021-08-21 18:12:23,993 INFO L226 Difference]: Without dead ends: 170 [2021-08-21 18:12:23,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1044.7ms TimeCoverageRelationStatistics Valid=447, Invalid=2975, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:12:23,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-08-21 18:12:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 108. [2021-08-21 18:12:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 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 18:12:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2021-08-21 18:12:23,995 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 106 [2021-08-21 18:12:23,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:23,995 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2021-08-21 18:12:23,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 29 states have internal predecessors, (106), 0 states have call successors, (0), 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 18:12:23,995 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2021-08-21 18:12:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-08-21 18:12:23,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:23,996 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:24,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:24,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 18:12:24,209 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:24,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:24,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1596792687, now seen corresponding path program 37 times [2021-08-21 18:12:24,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:24,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304382264] [2021-08-21 18:12:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:24,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 378 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:24,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:24,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304382264] [2021-08-21 18:12:24,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304382264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:24,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494482071] [2021-08-21 18:12:24,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:12:24,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:24,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:24,405 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:12:24,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 18:12:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:27,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:12:27,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 378 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:27,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494482071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:27,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:27,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-21 18:12:27,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12832482] [2021-08-21 18:12:27,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:12:27,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:27,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:12:27,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:12:27,717 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 17 states, 17 states have (on average 6.647058823529412) internal successors, (113), 16 states have internal predecessors, (113), 0 states have call successors, (0), 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 18:12:27,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:27,758 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2021-08-21 18:12:27,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:12:27,758 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.647058823529412) internal successors, (113), 16 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-08-21 18:12:27,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:27,759 INFO L225 Difference]: With dead ends: 174 [2021-08-21 18:12:27,759 INFO L226 Difference]: Without dead ends: 116 [2021-08-21 18:12:27,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:12:27,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-21 18:12:27,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 111. [2021-08-21 18:12:27,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 0 states have call successors, (0), 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 18:12:27,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-08-21 18:12:27,761 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 107 [2021-08-21 18:12:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:27,761 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-08-21 18:12:27,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.647058823529412) internal successors, (113), 16 states have internal predecessors, (113), 0 states have call successors, (0), 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 18:12:27,761 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-08-21 18:12:27,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-21 18:12:27,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:27,761 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:27,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:27,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 18:12:27,984 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:27,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:27,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1921002414, now seen corresponding path program 38 times [2021-08-21 18:12:27,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:27,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254162536] [2021-08-21 18:12:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:27,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:33,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:33,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254162536] [2021-08-21 18:12:33,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254162536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:33,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951551313] [2021-08-21 18:12:33,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:12:33,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:33,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:33,432 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:12:33,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 18:12:36,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:12:36,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:36,512 WARN L261 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 166 conjunts are in the unsatisfiable core [2021-08-21 18:12:36,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:44,606 INFO L354 Elim1Store]: treesize reduction 936, result has 0.1 percent of original size [2021-08-21 18:12:44,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 162 treesize of output 58 [2021-08-21 18:12:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:45,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951551313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:45,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:45,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 60] total 103 [2021-08-21 18:12:45,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576704525] [2021-08-21 18:12:45,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-08-21 18:12:45,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:45,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-08-21 18:12:45,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=10441, Unknown=0, NotChecked=0, Total=10712 [2021-08-21 18:12:45,086 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 104 states, 104 states have (on average 1.6634615384615385) internal successors, (173), 103 states have internal predecessors, (173), 0 states have call successors, (0), 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 18:12:52,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:52,755 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2021-08-21 18:12:52,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 18:12:52,755 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.6634615384615385) internal successors, (173), 103 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-21 18:12:52,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:52,756 INFO L225 Difference]: With dead ends: 183 [2021-08-21 18:12:52,756 INFO L226 Difference]: Without dead ends: 179 [2021-08-21 18:12:52,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 66 SyntacticMatches, 15 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3408 ImplicationChecksByTransitivity, 11890.5ms TimeCoverageRelationStatistics Valid=488, Invalid=17602, Unknown=0, NotChecked=0, Total=18090 [2021-08-21 18:12:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-21 18:12:52,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 122. [2021-08-21 18:12:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 0 states have call successors, (0), 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 18:12:52,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2021-08-21 18:12:52,759 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 110 [2021-08-21 18:12:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:52,759 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2021-08-21 18:12:52,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.6634615384615385) internal successors, (173), 103 states have internal predecessors, (173), 0 states have call successors, (0), 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 18:12:52,759 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2021-08-21 18:12:52,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-08-21 18:12:52,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:52,759 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:52,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:52,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-21 18:12:52,960 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:52,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:52,960 INFO L82 PathProgramCache]: Analyzing trace with hash -942133391, now seen corresponding path program 39 times [2021-08-21 18:12:52,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:52,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136477309] [2021-08-21 18:12:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:52,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:53,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:53,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136477309] [2021-08-21 18:12:53,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136477309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:53,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525597743] [2021-08-21 18:12:53,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:12:53,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:53,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:53,460 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:12:53,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 18:12:57,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-08-21 18:12:57,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:57,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-21 18:12:57,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:57,426 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 18:12:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:57,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525597743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:57,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:57,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-08-21 18:12:57,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978571509] [2021-08-21 18:12:57,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:12:57,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:57,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:12:57,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:12:57,444 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand has 32 states, 32 states have (on average 3.53125) internal successors, (113), 31 states have internal predecessors, (113), 0 states have call successors, (0), 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 18:12:58,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:58,564 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2021-08-21 18:12:58,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:12:58,565 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.53125) internal successors, (113), 31 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-08-21 18:12:58,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:58,565 INFO L225 Difference]: With dead ends: 181 [2021-08-21 18:12:58,565 INFO L226 Difference]: Without dead ends: 181 [2021-08-21 18:12:58,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1213.6ms TimeCoverageRelationStatistics Valid=501, Invalid=3405, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:12:58,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-08-21 18:12:58,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 115. [2021-08-21 18:12:58,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 0 states have call successors, (0), 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 18:12:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2021-08-21 18:12:58,567 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 113 [2021-08-21 18:12:58,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:58,567 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2021-08-21 18:12:58,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.53125) internal successors, (113), 31 states have internal predecessors, (113), 0 states have call successors, (0), 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 18:12:58,567 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2021-08-21 18:12:58,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-08-21 18:12:58,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:58,568 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:58,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:58,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:58,768 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:58,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:58,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1667620431, now seen corresponding path program 40 times [2021-08-21 18:12:58,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:58,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705511786] [2021-08-21 18:12:58,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:58,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 435 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:58,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:58,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705511786] [2021-08-21 18:12:58,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705511786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:58,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312248528] [2021-08-21 18:12:58,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:12:58,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:58,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:58,929 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:12:58,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 18:13:02,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:13:02,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:02,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:13:02,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 435 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:02,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312248528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:02,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:02,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-21 18:13:02,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844866164] [2021-08-21 18:13:02,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:13:02,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:02,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:13:02,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:13:02,859 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 18 states, 18 states have (on average 6.666666666666667) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 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 18:13:02,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:02,910 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2021-08-21 18:13:02,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:13:02,910 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.666666666666667) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-08-21 18:13:02,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:02,911 INFO L225 Difference]: With dead ends: 185 [2021-08-21 18:13:02,911 INFO L226 Difference]: Without dead ends: 123 [2021-08-21 18:13:02,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:13:02,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-21 18:13:02,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2021-08-21 18:13:02,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:13:02,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2021-08-21 18:13:02,913 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 114 [2021-08-21 18:13:02,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:02,914 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2021-08-21 18:13:02,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.666666666666667) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 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 18:13:02,914 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2021-08-21 18:13:02,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-08-21 18:13:02,914 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:02,915 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:02,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 18:13:03,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:03,129 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:03,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:03,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1158378508, now seen corresponding path program 41 times [2021-08-21 18:13:03,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:03,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511864233] [2021-08-21 18:13:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:03,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:09,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:09,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511864233] [2021-08-21 18:13:09,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511864233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:09,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402012621] [2021-08-21 18:13:09,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:13:09,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:09,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:09,365 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:13:09,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 18:13:13,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-08-21 18:13:13,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:13,051 WARN L261 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 176 conjunts are in the unsatisfiable core [2021-08-21 18:13:13,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:22,571 INFO L354 Elim1Store]: treesize reduction 1066, result has 0.1 percent of original size [2021-08-21 18:13:22,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 170 treesize of output 62 [2021-08-21 18:13:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:23,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402012621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:23,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:23,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 64] total 110 [2021-08-21 18:13:23,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831141492] [2021-08-21 18:13:23,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-08-21 18:13:23,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:23,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-08-21 18:13:23,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=11921, Unknown=0, NotChecked=0, Total=12210 [2021-08-21 18:13:23,081 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 111 states, 111 states have (on average 1.6576576576576576) internal successors, (184), 110 states have internal predecessors, (184), 0 states have call successors, (0), 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 18:13:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:31,974 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2021-08-21 18:13:31,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-21 18:13:31,975 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.6576576576576576) internal successors, (184), 110 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-08-21 18:13:31,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:31,975 INFO L225 Difference]: With dead ends: 194 [2021-08-21 18:13:31,975 INFO L226 Difference]: Without dead ends: 190 [2021-08-21 18:13:31,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 70 SyntacticMatches, 16 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3875 ImplicationChecksByTransitivity, 13936.0ms TimeCoverageRelationStatistics Valid=520, Invalid=20072, Unknown=0, NotChecked=0, Total=20592 [2021-08-21 18:13:31,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-08-21 18:13:31,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2021-08-21 18:13:31,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 0 states have call successors, (0), 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 18:13:31,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2021-08-21 18:13:31,978 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 117 [2021-08-21 18:13:31,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:31,978 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2021-08-21 18:13:31,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.6576576576576576) internal successors, (184), 110 states have internal predecessors, (184), 0 states have call successors, (0), 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 18:13:31,978 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2021-08-21 18:13:31,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-08-21 18:13:31,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:31,979 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:32,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 18:13:32,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-21 18:13:32,189 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:32,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:32,189 INFO L82 PathProgramCache]: Analyzing trace with hash -156739887, now seen corresponding path program 42 times [2021-08-21 18:13:32,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:32,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452209011] [2021-08-21 18:13:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:32,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 765 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:32,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:32,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452209011] [2021-08-21 18:13:32,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452209011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:32,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530108391] [2021-08-21 18:13:32,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:13:32,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:32,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:32,756 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:13:32,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 18:13:37,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-08-21 18:13:37,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:37,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 64 conjunts are in the unsatisfiable core [2021-08-21 18:13:37,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:37,451 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 18:13:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 765 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:37,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530108391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:37,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:37,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-08-21 18:13:37,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106105490] [2021-08-21 18:13:37,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 18:13:37,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:37,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 18:13:37,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:13:37,469 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 33 states have internal predecessors, (120), 0 states have call successors, (0), 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 18:13:38,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:38,751 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2021-08-21 18:13:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:13:38,752 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 33 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-08-21 18:13:38,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:38,752 INFO L225 Difference]: With dead ends: 192 [2021-08-21 18:13:38,752 INFO L226 Difference]: Without dead ends: 192 [2021-08-21 18:13:38,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1388.3ms TimeCoverageRelationStatistics Valid=558, Invalid=3864, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 18:13:38,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-21 18:13:38,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 122. [2021-08-21 18:13:38,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 0 states have call successors, (0), 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 18:13:38,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2021-08-21 18:13:38,754 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 120 [2021-08-21 18:13:38,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:38,755 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2021-08-21 18:13:38,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 33 states have internal predecessors, (120), 0 states have call successors, (0), 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 18:13:38,755 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2021-08-21 18:13:38,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-08-21 18:13:38,755 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:38,755 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:38,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 18:13:38,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-21 18:13:38,969 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:38,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:38,970 INFO L82 PathProgramCache]: Analyzing trace with hash -675746057, now seen corresponding path program 43 times [2021-08-21 18:13:38,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:38,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102071156] [2021-08-21 18:13:38,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:38,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 496 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:39,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:39,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102071156] [2021-08-21 18:13:39,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102071156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:39,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694929343] [2021-08-21 18:13:39,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:13:39,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:39,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:39,150 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:13:39,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 18:13:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:43,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:13:43,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:13:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 496 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:43,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694929343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:43,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:13:43,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-08-21 18:13:43,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107015315] [2021-08-21 18:13:43,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:13:43,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:13:43,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:13:43,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:13:43,751 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 19 states, 19 states have (on average 6.684210526315789) internal successors, (127), 18 states have internal predecessors, (127), 0 states have call successors, (0), 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 18:13:43,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:13:43,802 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2021-08-21 18:13:43,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:13:43,802 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.684210526315789) internal successors, (127), 18 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-08-21 18:13:43,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:13:43,802 INFO L225 Difference]: With dead ends: 196 [2021-08-21 18:13:43,803 INFO L226 Difference]: Without dead ends: 130 [2021-08-21 18:13:43,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:13:43,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-21 18:13:43,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2021-08-21 18:13:43,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 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 18:13:43,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-08-21 18:13:43,804 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 121 [2021-08-21 18:13:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:13:43,804 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-08-21 18:13:43,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.684210526315789) internal successors, (127), 18 states have internal predecessors, (127), 0 states have call successors, (0), 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 18:13:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-08-21 18:13:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-08-21 18:13:43,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:13:43,805 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:13:43,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 18:13:44,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 18:13:44,013 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:13:44,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:13:44,013 INFO L82 PathProgramCache]: Analyzing trace with hash 748815188, now seen corresponding path program 44 times [2021-08-21 18:13:44,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:13:44,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267903458] [2021-08-21 18:13:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:13:44,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:13:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:13:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:13:51,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:13:51,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267903458] [2021-08-21 18:13:51,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267903458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:13:51,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294907139] [2021-08-21 18:13:51,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:13:51,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:13:51,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:13:51,202 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:13:51,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 18:13:55,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:13:55,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:13:55,560 WARN L261 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 190 conjunts are in the unsatisfiable core [2021-08-21 18:13:55,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:06,469 INFO L354 Elim1Store]: treesize reduction 1260, result has 0.1 percent of original size [2021-08-21 18:14:06,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 186 treesize of output 66 [2021-08-21 18:14:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:07,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294907139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:07,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:07,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 68] total 117 [2021-08-21 18:14:07,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061927104] [2021-08-21 18:14:07,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2021-08-21 18:14:07,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:07,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-08-21 18:14:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=13499, Unknown=0, NotChecked=0, Total=13806 [2021-08-21 18:14:07,003 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 118 states, 118 states have (on average 1.652542372881356) internal successors, (195), 117 states have internal predecessors, (195), 0 states have call successors, (0), 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 18:14:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:17,359 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2021-08-21 18:14:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-21 18:14:17,359 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.652542372881356) internal successors, (195), 117 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-08-21 18:14:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:17,360 INFO L225 Difference]: With dead ends: 205 [2021-08-21 18:14:17,360 INFO L226 Difference]: Without dead ends: 201 [2021-08-21 18:14:17,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 74 SyntacticMatches, 17 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4372 ImplicationChecksByTransitivity, 16171.6ms TimeCoverageRelationStatistics Valid=552, Invalid=22704, Unknown=0, NotChecked=0, Total=23256 [2021-08-21 18:14:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-08-21 18:14:17,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 136. [2021-08-21 18:14:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 0 states have call successors, (0), 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 18:14:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2021-08-21 18:14:17,363 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 124 [2021-08-21 18:14:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:17,363 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2021-08-21 18:14:17,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.652542372881356) internal successors, (195), 117 states have internal predecessors, (195), 0 states have call successors, (0), 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 18:14:17,363 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2021-08-21 18:14:17,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-08-21 18:14:17,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:17,363 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:17,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 18:14:17,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:17,580 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:14:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:17,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1281013207, now seen corresponding path program 45 times [2021-08-21 18:14:17,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:17,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736031854] [2021-08-21 18:14:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:17,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:18,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:18,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736031854] [2021-08-21 18:14:18,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736031854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:18,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147543010] [2021-08-21 18:14:18,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:14:18,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:18,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:18,239 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:14:18,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 18:14:23,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-08-21 18:14:23,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:23,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 68 conjunts are in the unsatisfiable core [2021-08-21 18:14:23,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:23,666 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 18:14:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:23,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147543010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:23,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:23,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-08-21 18:14:23,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296234348] [2021-08-21 18:14:23,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:14:23,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:23,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:14:23,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:14:23,685 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 36 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 35 states have internal predecessors, (127), 0 states have call successors, (0), 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 18:14:25,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:25,116 INFO L93 Difference]: Finished difference Result 203 states and 205 transitions. [2021-08-21 18:14:25,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:14:25,116 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 35 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-08-21 18:14:25,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:25,117 INFO L225 Difference]: With dead ends: 203 [2021-08-21 18:14:25,117 INFO L226 Difference]: Without dead ends: 203 [2021-08-21 18:14:25,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1594.3ms TimeCoverageRelationStatistics Valid=618, Invalid=4352, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 18:14:25,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-08-21 18:14:25,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 129. [2021-08-21 18:14:25,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 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 18:14:25,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-08-21 18:14:25,119 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 127 [2021-08-21 18:14:25,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:25,120 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-08-21 18:14:25,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 35 states have internal predecessors, (127), 0 states have call successors, (0), 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 18:14:25,120 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-08-21 18:14:25,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-08-21 18:14:25,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:25,120 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:25,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 18:14:25,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 18:14:25,341 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:14:25,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:25,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1025226327, now seen corresponding path program 46 times [2021-08-21 18:14:25,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:25,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118245090] [2021-08-21 18:14:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:25,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 561 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:25,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:25,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118245090] [2021-08-21 18:14:25,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118245090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:25,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133999463] [2021-08-21 18:14:25,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:14:25,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:25,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:25,598 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:14:25,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 18:14:30,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:14:30,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:30,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:14:30,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 561 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:30,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133999463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:30,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:30,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-08-21 18:14:30,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191187653] [2021-08-21 18:14:30,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:14:30,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:30,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:14:30,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:14:30,991 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 20 states, 20 states have (on average 6.7) internal successors, (134), 19 states have internal predecessors, (134), 0 states have call successors, (0), 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 18:14:31,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:14:31,038 INFO L93 Difference]: Finished difference Result 207 states and 209 transitions. [2021-08-21 18:14:31,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:14:31,038 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.7) internal successors, (134), 19 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-08-21 18:14:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:14:31,039 INFO L225 Difference]: With dead ends: 207 [2021-08-21 18:14:31,039 INFO L226 Difference]: Without dead ends: 137 [2021-08-21 18:14:31,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:14:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-21 18:14:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2021-08-21 18:14:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 0 states have call successors, (0), 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 18:14:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2021-08-21 18:14:31,041 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2021-08-21 18:14:31,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:14:31,041 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2021-08-21 18:14:31,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.7) internal successors, (134), 19 states have internal predecessors, (134), 0 states have call successors, (0), 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 18:14:31,041 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2021-08-21 18:14:31,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-08-21 18:14:31,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:14:31,041 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:14:31,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 18:14:31,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 18:14:31,242 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:14:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:14:31,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1805553830, now seen corresponding path program 47 times [2021-08-21 18:14:31,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:14:31,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961963562] [2021-08-21 18:14:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:14:31,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:14:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:14:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:39,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:14:39,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961963562] [2021-08-21 18:14:39,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961963562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:39,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190127065] [2021-08-21 18:14:39,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:14:39,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:14:39,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:14:39,556 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:14:39,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 18:14:44,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-08-21 18:14:44,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:14:44,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 200 conjunts are in the unsatisfiable core [2021-08-21 18:14:44,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:14:57,397 INFO L354 Elim1Store]: treesize reduction 1410, result has 0.1 percent of original size [2021-08-21 18:14:57,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 194 treesize of output 70 [2021-08-21 18:14:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:14:57,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190127065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:14:57,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:14:57,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 72] total 124 [2021-08-21 18:14:57,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231385812] [2021-08-21 18:14:57,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-08-21 18:14:57,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:14:57,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-08-21 18:14:57,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=15175, Unknown=0, NotChecked=0, Total=15500 [2021-08-21 18:14:57,999 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 125 states, 125 states have (on average 1.648) internal successors, (206), 124 states have internal predecessors, (206), 0 states have call successors, (0), 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 18:15:10,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:10,628 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2021-08-21 18:15:10,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-21 18:15:10,629 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.648) internal successors, (206), 124 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-08-21 18:15:10,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:10,629 INFO L225 Difference]: With dead ends: 216 [2021-08-21 18:15:10,629 INFO L226 Difference]: Without dead ends: 212 [2021-08-21 18:15:10,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 78 SyntacticMatches, 18 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 18699.3ms TimeCoverageRelationStatistics Valid=584, Invalid=25498, Unknown=0, NotChecked=0, Total=26082 [2021-08-21 18:15:10,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-21 18:15:10,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 143. [2021-08-21 18:15:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0211267605633803) internal successors, (145), 142 states have internal predecessors, (145), 0 states have call successors, (0), 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 18:15:10,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2021-08-21 18:15:10,632 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 131 [2021-08-21 18:15:10,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:10,632 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2021-08-21 18:15:10,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.648) internal successors, (206), 124 states have internal predecessors, (206), 0 states have call successors, (0), 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 18:15:10,633 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2021-08-21 18:15:10,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-08-21 18:15:10,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:10,633 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:10,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 18:15:10,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 18:15:10,837 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:10,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1894354057, now seen corresponding path program 48 times [2021-08-21 18:15:10,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:10,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199877691] [2021-08-21 18:15:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:10,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 0 proven. 986 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:11,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:11,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199877691] [2021-08-21 18:15:11,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199877691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:11,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420471295] [2021-08-21 18:15:11,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:15:11,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:11,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:11,591 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:15:11,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 18:15:17,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-08-21 18:15:17,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:17,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 72 conjunts are in the unsatisfiable core [2021-08-21 18:15:17,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:17,905 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 18:15:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 0 proven. 986 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:17,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420471295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:17,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:17,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2021-08-21 18:15:17,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85750297] [2021-08-21 18:15:17,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 18:15:17,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:17,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 18:15:17,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:15:17,924 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 37 states have internal predecessors, (134), 0 states have call successors, (0), 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 18:15:19,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:19,550 INFO L93 Difference]: Finished difference Result 214 states and 216 transitions. [2021-08-21 18:15:19,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:15:19,554 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 37 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-08-21 18:15:19,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:19,555 INFO L225 Difference]: With dead ends: 214 [2021-08-21 18:15:19,555 INFO L226 Difference]: Without dead ends: 214 [2021-08-21 18:15:19,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1835.8ms TimeCoverageRelationStatistics Valid=681, Invalid=4869, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 18:15:19,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-08-21 18:15:19,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 136. [2021-08-21 18:15:19,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 0 states have call successors, (0), 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 18:15:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2021-08-21 18:15:19,563 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 134 [2021-08-21 18:15:19,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:19,563 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2021-08-21 18:15:19,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 37 states have internal predecessors, (134), 0 states have call successors, (0), 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 18:15:19,563 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2021-08-21 18:15:19,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-21 18:15:19,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:19,564 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:19,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-21 18:15:19,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-08-21 18:15:19,769 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:19,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:19,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1617318051, now seen corresponding path program 49 times [2021-08-21 18:15:19,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:19,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939372993] [2021-08-21 18:15:19,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:19,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 630 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:19,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:19,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939372993] [2021-08-21 18:15:19,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939372993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:19,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550426376] [2021-08-21 18:15:19,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:15:19,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:19,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:19,983 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:15:19,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 18:15:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:25,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 18:15:25,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 630 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:26,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550426376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:26,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:26,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 20 [2021-08-21 18:15:26,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645786406] [2021-08-21 18:15:26,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:15:26,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:26,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:15:26,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:15:26,213 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 21 states, 21 states have (on average 6.714285714285714) internal successors, (141), 20 states have internal predecessors, (141), 0 states have call successors, (0), 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 18:15:26,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:15:26,263 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2021-08-21 18:15:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:15:26,263 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.714285714285714) internal successors, (141), 20 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-08-21 18:15:26,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:15:26,264 INFO L225 Difference]: With dead ends: 218 [2021-08-21 18:15:26,264 INFO L226 Difference]: Without dead ends: 144 [2021-08-21 18:15:26,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:15:26,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-08-21 18:15:26,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2021-08-21 18:15:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 0 states have call successors, (0), 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 18:15:26,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2021-08-21 18:15:26,265 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 135 [2021-08-21 18:15:26,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:15:26,266 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2021-08-21 18:15:26,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.714285714285714) internal successors, (141), 20 states have internal predecessors, (141), 0 states have call successors, (0), 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 18:15:26,266 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2021-08-21 18:15:26,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-08-21 18:15:26,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:15:26,266 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:15:26,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 18:15:26,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:26,467 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:15:26,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:15:26,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1908759802, now seen corresponding path program 50 times [2021-08-21 18:15:26,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:15:26,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252358123] [2021-08-21 18:15:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:15:26,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:15:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:15:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:35,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:15:35,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252358123] [2021-08-21 18:15:35,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252358123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:35,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284689984] [2021-08-21 18:15:35,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:15:35,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:15:35,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:15:35,805 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:15:35,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 18:15:41,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:15:41,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:15:41,731 WARN L261 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 214 conjunts are in the unsatisfiable core [2021-08-21 18:15:41,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:15:56,151 INFO L354 Elim1Store]: treesize reduction 1632, result has 0.1 percent of original size [2021-08-21 18:15:56,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 136 case distinctions, treesize of input 210 treesize of output 74 [2021-08-21 18:15:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:15:56,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284689984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:15:56,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:15:56,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 76] total 131 [2021-08-21 18:15:56,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119398477] [2021-08-21 18:15:56,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-08-21 18:15:56,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:15:56,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-08-21 18:15:56,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=16949, Unknown=0, NotChecked=0, Total=17292 [2021-08-21 18:15:56,776 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 132 states, 132 states have (on average 1.643939393939394) internal successors, (217), 131 states have internal predecessors, (217), 0 states have call successors, (0), 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 18:16:09,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:09,689 INFO L93 Difference]: Finished difference Result 227 states and 229 transitions. [2021-08-21 18:16:09,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-21 18:16:09,689 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.643939393939394) internal successors, (217), 131 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-08-21 18:16:09,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:09,690 INFO L225 Difference]: With dead ends: 227 [2021-08-21 18:16:09,690 INFO L226 Difference]: Without dead ends: 223 [2021-08-21 18:16:09,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 82 SyntacticMatches, 19 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5456 ImplicationChecksByTransitivity, 21439.2ms TimeCoverageRelationStatistics Valid=616, Invalid=28454, Unknown=0, NotChecked=0, Total=29070 [2021-08-21 18:16:09,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-21 18:16:09,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 150. [2021-08-21 18:16:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 0 states have call successors, (0), 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 18:16:09,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2021-08-21 18:16:09,693 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 138 [2021-08-21 18:16:09,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:09,693 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2021-08-21 18:16:09,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.643939393939394) internal successors, (217), 131 states have internal predecessors, (217), 0 states have call successors, (0), 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 18:16:09,693 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2021-08-21 18:16:09,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-08-21 18:16:09,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:09,694 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:09,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 18:16:09,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-21 18:16:09,901 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:09,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:09,901 INFO L82 PathProgramCache]: Analyzing trace with hash 983952957, now seen corresponding path program 51 times [2021-08-21 18:16:09,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:09,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594331719] [2021-08-21 18:16:09,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:09,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:10,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:10,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594331719] [2021-08-21 18:16:10,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594331719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:10,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615921656] [2021-08-21 18:16:10,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:16:10,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:10,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:10,681 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:16:10,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 18:16:17,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-08-21 18:16:17,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:17,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 76 conjunts are in the unsatisfiable core [2021-08-21 18:16:17,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:17,884 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 18:16:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:17,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615921656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:17,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:17,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-08-21 18:16:17,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911026920] [2021-08-21 18:16:17,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:16:17,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:17,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:16:17,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:16:17,904 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand has 40 states, 40 states have (on average 3.525) internal successors, (141), 39 states have internal predecessors, (141), 0 states have call successors, (0), 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 18:16:19,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:19,698 INFO L93 Difference]: Finished difference Result 225 states and 227 transitions. [2021-08-21 18:16:19,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:16:19,699 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.525) internal successors, (141), 39 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-08-21 18:16:19,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:19,699 INFO L225 Difference]: With dead ends: 225 [2021-08-21 18:16:19,699 INFO L226 Difference]: Without dead ends: 225 [2021-08-21 18:16:19,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1976.5ms TimeCoverageRelationStatistics Valid=747, Invalid=5415, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 18:16:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-08-21 18:16:19,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 143. [2021-08-21 18:16:19,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 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 18:16:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2021-08-21 18:16:19,702 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 141 [2021-08-21 18:16:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:19,702 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2021-08-21 18:16:19,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.525) internal successors, (141), 39 states have internal predecessors, (141), 0 states have call successors, (0), 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 18:16:19,702 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2021-08-21 18:16:19,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-08-21 18:16:19,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:19,703 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:19,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 18:16:19,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:19,925 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:19,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:19,925 INFO L82 PathProgramCache]: Analyzing trace with hash 671993085, now seen corresponding path program 52 times [2021-08-21 18:16:19,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:19,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418253978] [2021-08-21 18:16:19,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:19,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 703 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:20,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:20,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418253978] [2021-08-21 18:16:20,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418253978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:20,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721147995] [2021-08-21 18:16:20,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:16:20,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:20,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:20,216 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:16:20,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 18:16:26,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:16:26,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:26,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 18:16:26,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:16:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 703 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:27,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721147995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:27,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:16:27,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 21 [2021-08-21 18:16:27,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171655571] [2021-08-21 18:16:27,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:16:27,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:16:27,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:16:27,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:16:27,316 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 22 states, 22 states have (on average 6.7272727272727275) internal successors, (148), 21 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 18:16:27,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:16:27,376 INFO L93 Difference]: Finished difference Result 229 states and 231 transitions. [2021-08-21 18:16:27,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:16:27,377 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.7272727272727275) internal successors, (148), 21 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) Word has length 142 [2021-08-21 18:16:27,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:16:27,377 INFO L225 Difference]: With dead ends: 229 [2021-08-21 18:16:27,377 INFO L226 Difference]: Without dead ends: 151 [2021-08-21 18:16:27,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:16:27,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-08-21 18:16:27,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 146. [2021-08-21 18:16:27,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.013793103448276) internal successors, (147), 145 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:16:27,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2021-08-21 18:16:27,379 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 142 [2021-08-21 18:16:27,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:16:27,379 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2021-08-21 18:16:27,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.7272727272727275) internal successors, (148), 21 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 18:16:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2021-08-21 18:16:27,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-08-21 18:16:27,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:16:27,380 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:16:27,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 18:16:27,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:27,601 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:16:27,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:16:27,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2146305216, now seen corresponding path program 53 times [2021-08-21 18:16:27,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:16:27,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423153476] [2021-08-21 18:16:27,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:16:27,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:16:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:16:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:16:38,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:16:38,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423153476] [2021-08-21 18:16:38,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423153476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:16:38,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848157130] [2021-08-21 18:16:38,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:16:38,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:16:38,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:16:38,189 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:16:38,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 18:16:45,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-08-21 18:16:45,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:16:45,050 WARN L261 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 224 conjunts are in the unsatisfiable core [2021-08-21 18:16:45,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:01,542 INFO L354 Elim1Store]: treesize reduction 1802, result has 0.1 percent of original size [2021-08-21 18:17:01,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 218 treesize of output 78 [2021-08-21 18:17:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:02,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848157130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:02,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:02,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 80] total 138 [2021-08-21 18:17:02,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683156494] [2021-08-21 18:17:02,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-08-21 18:17:02,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:02,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-08-21 18:17:02,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=18821, Unknown=0, NotChecked=0, Total=19182 [2021-08-21 18:17:02,177 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand has 139 states, 139 states have (on average 1.6402877697841727) internal successors, (228), 138 states have internal predecessors, (228), 0 states have call successors, (0), 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 18:17:18,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:18,681 INFO L93 Difference]: Finished difference Result 238 states and 240 transitions. [2021-08-21 18:17:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-21 18:17:18,681 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.6402877697841727) internal successors, (228), 138 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-08-21 18:17:18,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:18,682 INFO L225 Difference]: With dead ends: 238 [2021-08-21 18:17:18,682 INFO L226 Difference]: Without dead ends: 234 [2021-08-21 18:17:18,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 86 SyntacticMatches, 20 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6043 ImplicationChecksByTransitivity, 24332.7ms TimeCoverageRelationStatistics Valid=648, Invalid=31572, Unknown=0, NotChecked=0, Total=32220 [2021-08-21 18:17:18,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-08-21 18:17:18,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 157. [2021-08-21 18:17:18,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 0 states have call successors, (0), 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 18:17:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2021-08-21 18:17:18,685 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 145 [2021-08-21 18:17:18,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:18,685 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2021-08-21 18:17:18,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.6402877697841727) internal successors, (228), 138 states have internal predecessors, (228), 0 states have call successors, (0), 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 18:17:18,685 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2021-08-21 18:17:18,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-08-21 18:17:18,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:18,686 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:18,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 18:17:18,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:18,901 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:17:18,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:18,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1251536355, now seen corresponding path program 54 times [2021-08-21 18:17:18,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:18,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758804152] [2021-08-21 18:17:18,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:18,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:19,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:19,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758804152] [2021-08-21 18:17:19,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758804152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:19,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695664790] [2021-08-21 18:17:19,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:17:19,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:19,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:19,769 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:17:19,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 18:17:27,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-08-21 18:17:27,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:27,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 82 conjunts are in the unsatisfiable core [2021-08-21 18:17:27,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:28,083 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 18:17:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:28,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695664790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:28,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:28,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2021-08-21 18:17:28,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186279510] [2021-08-21 18:17:28,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:17:28,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:28,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:17:28,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:17:28,102 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 42 states, 42 states have (on average 3.5238095238095237) internal successors, (148), 41 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 18:17:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:30,107 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2021-08-21 18:17:30,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 18:17:30,107 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5238095238095237) internal successors, (148), 41 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) Word has length 148 [2021-08-21 18:17:30,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:30,108 INFO L225 Difference]: With dead ends: 236 [2021-08-21 18:17:30,108 INFO L226 Difference]: Without dead ends: 236 [2021-08-21 18:17:30,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 2229.8ms TimeCoverageRelationStatistics Valid=816, Invalid=5990, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 18:17:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-08-21 18:17:30,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 150. [2021-08-21 18:17:30,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:17:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2021-08-21 18:17:30,110 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 148 [2021-08-21 18:17:30,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:30,110 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2021-08-21 18:17:30,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5238095238095237) internal successors, (148), 41 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 18:17:30,110 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2021-08-21 18:17:30,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-08-21 18:17:30,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:30,111 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:30,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 18:17:30,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:30,321 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:17:30,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:30,321 INFO L82 PathProgramCache]: Analyzing trace with hash 510730691, now seen corresponding path program 55 times [2021-08-21 18:17:30,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:30,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402197283] [2021-08-21 18:17:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:30,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 780 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:30,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:30,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402197283] [2021-08-21 18:17:30,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402197283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:30,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749097601] [2021-08-21 18:17:30,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:17:30,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:30,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:30,594 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:17:30,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 18:17:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:38,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 18:17:38,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:17:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 780 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:38,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749097601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:38,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:17:38,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 22 [2021-08-21 18:17:38,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776565940] [2021-08-21 18:17:38,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:17:38,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:17:38,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:17:38,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:17:38,784 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 22 states have internal predecessors, (155), 0 states have call successors, (0), 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 18:17:38,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:17:38,847 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2021-08-21 18:17:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:17:38,847 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 22 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-08-21 18:17:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:17:38,848 INFO L225 Difference]: With dead ends: 240 [2021-08-21 18:17:38,848 INFO L226 Difference]: Without dead ends: 158 [2021-08-21 18:17:38,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:17:38,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-21 18:17:38,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 153. [2021-08-21 18:17:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 0 states have call successors, (0), 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 18:17:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2021-08-21 18:17:38,851 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 149 [2021-08-21 18:17:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:17:38,851 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2021-08-21 18:17:38,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 22 states have internal predecessors, (155), 0 states have call successors, (0), 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 18:17:38,851 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2021-08-21 18:17:38,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-08-21 18:17:38,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:17:38,851 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:17:38,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 18:17:39,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-21 18:17:39,065 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:17:39,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:17:39,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1413859168, now seen corresponding path program 56 times [2021-08-21 18:17:39,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:17:39,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099967708] [2021-08-21 18:17:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:17:39,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:17:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:17:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:17:50,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:17:50,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099967708] [2021-08-21 18:17:50,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099967708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:17:50,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536086515] [2021-08-21 18:17:50,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:17:50,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:17:50,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:17:50,853 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:17:50,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 18:17:58,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:17:58,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:17:58,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 238 conjunts are in the unsatisfiable core [2021-08-21 18:17:58,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:17,319 INFO L354 Elim1Store]: treesize reduction 2052, result has 0.0 percent of original size [2021-08-21 18:18:17,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 234 treesize of output 82 [2021-08-21 18:18:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:18,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536086515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:18,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:18,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 84] total 145 [2021-08-21 18:18:18,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939170541] [2021-08-21 18:18:18,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2021-08-21 18:18:18,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:18,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-08-21 18:18:18,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=20791, Unknown=0, NotChecked=0, Total=21170 [2021-08-21 18:18:18,006 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 146 states, 146 states have (on average 1.6369863013698631) internal successors, (239), 145 states have internal predecessors, (239), 0 states have call successors, (0), 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 18:18:35,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:35,162 INFO L93 Difference]: Finished difference Result 249 states and 251 transitions. [2021-08-21 18:18:35,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-21 18:18:35,162 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.6369863013698631) internal successors, (239), 145 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-08-21 18:18:35,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:35,163 INFO L225 Difference]: With dead ends: 249 [2021-08-21 18:18:35,163 INFO L226 Difference]: Without dead ends: 245 [2021-08-21 18:18:35,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 90 SyntacticMatches, 21 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6660 ImplicationChecksByTransitivity, 27352.2ms TimeCoverageRelationStatistics Valid=680, Invalid=34852, Unknown=0, NotChecked=0, Total=35532 [2021-08-21 18:18:35,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-08-21 18:18:35,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 164. [2021-08-21 18:18:35,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.01840490797546) internal successors, (166), 163 states have internal predecessors, (166), 0 states have call successors, (0), 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 18:18:35,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2021-08-21 18:18:35,166 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 152 [2021-08-21 18:18:35,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:35,166 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2021-08-21 18:18:35,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.6369863013698631) internal successors, (239), 145 states have internal predecessors, (239), 0 states have call successors, (0), 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 18:18:35,166 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2021-08-21 18:18:35,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-08-21 18:18:35,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:35,167 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:35,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-21 18:18:35,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 18:18:35,385 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:18:35,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:35,385 INFO L82 PathProgramCache]: Analyzing trace with hash 943052963, now seen corresponding path program 57 times [2021-08-21 18:18:35,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:35,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687141138] [2021-08-21 18:18:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:35,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:36,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:36,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687141138] [2021-08-21 18:18:36,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687141138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:36,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044671351] [2021-08-21 18:18:36,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:18:36,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:36,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:36,474 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:18:36,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 18:18:45,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-08-21 18:18:45,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:18:45,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 86 conjunts are in the unsatisfiable core [2021-08-21 18:18:45,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:45,809 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 18:18:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:45,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044671351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:45,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:45,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2021-08-21 18:18:45,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785021031] [2021-08-21 18:18:45,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 18:18:45,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:45,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 18:18:45,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:18:45,830 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand has 44 states, 44 states have (on average 3.522727272727273) internal successors, (155), 43 states have internal predecessors, (155), 0 states have call successors, (0), 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 18:18:48,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:48,056 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2021-08-21 18:18:48,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 18:18:48,056 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.522727272727273) internal successors, (155), 43 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-08-21 18:18:48,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:48,057 INFO L225 Difference]: With dead ends: 247 [2021-08-21 18:18:48,057 INFO L226 Difference]: Without dead ends: 247 [2021-08-21 18:18:48,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 2526.7ms TimeCoverageRelationStatistics Valid=888, Invalid=6594, Unknown=0, NotChecked=0, Total=7482 [2021-08-21 18:18:48,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-08-21 18:18:48,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 157. [2021-08-21 18:18:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 0 states have call successors, (0), 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 18:18:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-08-21 18:18:48,060 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 155 [2021-08-21 18:18:48,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:48,060 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-08-21 18:18:48,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.522727272727273) internal successors, (155), 43 states have internal predecessors, (155), 0 states have call successors, (0), 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 18:18:48,060 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-08-21 18:18:48,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-08-21 18:18:48,060 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:48,060 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:48,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-21 18:18:48,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 18:18:48,275 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:18:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:48,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1598055843, now seen corresponding path program 58 times [2021-08-21 18:18:48,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:48,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989949514] [2021-08-21 18:18:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:48,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:18:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1393 backedges. 861 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:48,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:18:48,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989949514] [2021-08-21 18:18:48,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989949514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:48,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491222242] [2021-08-21 18:18:48,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:18:48,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:48,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:18:48,655 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:18:48,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 18:18:57,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:18:57,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:18:57,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:18:57,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:18:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1393 backedges. 861 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:18:57,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491222242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:18:57,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:18:57,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 23 [2021-08-21 18:18:57,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760076893] [2021-08-21 18:18:57,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:18:57,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:18:57,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:18:57,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:18:57,868 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 24 states, 24 states have (on average 6.75) internal successors, (162), 23 states have internal predecessors, (162), 0 states have call successors, (0), 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 18:18:57,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:18:57,934 INFO L93 Difference]: Finished difference Result 251 states and 253 transitions. [2021-08-21 18:18:57,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:18:57,934 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.75) internal successors, (162), 23 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-08-21 18:18:57,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:18:57,935 INFO L225 Difference]: With dead ends: 251 [2021-08-21 18:18:57,935 INFO L226 Difference]: Without dead ends: 165 [2021-08-21 18:18:57,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:18:57,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-08-21 18:18:57,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 160. [2021-08-21 18:18:57,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 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 18:18:57,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2021-08-21 18:18:57,937 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 156 [2021-08-21 18:18:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:18:57,937 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2021-08-21 18:18:57,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.75) internal successors, (162), 23 states have internal predecessors, (162), 0 states have call successors, (0), 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 18:18:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2021-08-21 18:18:57,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-08-21 18:18:57,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:18:57,938 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:18:57,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 18:18:58,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:18:58,157 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:18:58,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:18:58,157 INFO L82 PathProgramCache]: Analyzing trace with hash 85347366, now seen corresponding path program 59 times [2021-08-21 18:18:58,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:18:58,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845404145] [2021-08-21 18:18:58,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:18:58,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:18:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:19:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:11,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:19:11,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845404145] [2021-08-21 18:19:11,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845404145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:11,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903410098] [2021-08-21 18:19:11,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:19:11,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:19:11,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:19:11,386 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:19:11,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 18:19:20,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-08-21 18:19:20,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:19:20,278 WARN L261 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 248 conjunts are in the unsatisfiable core [2021-08-21 18:19:20,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:19:41,140 INFO L354 Elim1Store]: treesize reduction 2242, result has 0.0 percent of original size [2021-08-21 18:19:41,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 242 treesize of output 86 [2021-08-21 18:19:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:19:41,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903410098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:19:41,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:19:41,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 88] total 152 [2021-08-21 18:19:41,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135927777] [2021-08-21 18:19:41,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2021-08-21 18:19:41,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:19:41,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2021-08-21 18:19:41,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=22859, Unknown=0, NotChecked=0, Total=23256 [2021-08-21 18:19:41,857 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 153 states, 153 states have (on average 1.6339869281045751) internal successors, (250), 152 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 18:20:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:01,514 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2021-08-21 18:20:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-08-21 18:20:01,515 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.6339869281045751) internal successors, (250), 152 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) Word has length 159 [2021-08-21 18:20:01,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:01,516 INFO L225 Difference]: With dead ends: 260 [2021-08-21 18:20:01,516 INFO L226 Difference]: Without dead ends: 256 [2021-08-21 18:20:01,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 94 SyntacticMatches, 22 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7307 ImplicationChecksByTransitivity, 30958.6ms TimeCoverageRelationStatistics Valid=712, Invalid=38294, Unknown=0, NotChecked=0, Total=39006 [2021-08-21 18:20:01,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-21 18:20:01,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 171. [2021-08-21 18:20:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0176470588235293) internal successors, (173), 170 states have internal predecessors, (173), 0 states have call successors, (0), 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 18:20:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2021-08-21 18:20:01,519 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 159 [2021-08-21 18:20:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:01,519 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2021-08-21 18:20:01,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.6339869281045751) internal successors, (250), 152 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 18:20:01,520 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2021-08-21 18:20:01,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-08-21 18:20:01,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:01,520 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:01,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 18:20:01,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:01,731 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:01,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:01,732 INFO L82 PathProgramCache]: Analyzing trace with hash 2078945987, now seen corresponding path program 60 times [2021-08-21 18:20:01,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:01,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146187767] [2021-08-21 18:20:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:01,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 1512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:02,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:02,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146187767] [2021-08-21 18:20:02,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146187767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:02,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486732504] [2021-08-21 18:20:02,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:20:02,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:02,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:02,850 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:20:02,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 18:20:12,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-08-21 18:20:12,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:12,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 88 conjunts are in the unsatisfiable core [2021-08-21 18:20:12,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:13,512 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 18:20:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 1512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:13,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486732504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:13,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:13,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2021-08-21 18:20:13,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365933428] [2021-08-21 18:20:13,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-21 18:20:13,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:13,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-21 18:20:13,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:20:13,531 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand has 46 states, 46 states have (on average 3.5217391304347827) internal successors, (162), 45 states have internal predecessors, (162), 0 states have call successors, (0), 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 18:20:16,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:16,028 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2021-08-21 18:20:16,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:20:16,028 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.5217391304347827) internal successors, (162), 45 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-08-21 18:20:16,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:16,029 INFO L225 Difference]: With dead ends: 258 [2021-08-21 18:20:16,029 INFO L226 Difference]: Without dead ends: 258 [2021-08-21 18:20:16,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 2773.4ms TimeCoverageRelationStatistics Valid=963, Invalid=7227, Unknown=0, NotChecked=0, Total=8190 [2021-08-21 18:20:16,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-08-21 18:20:16,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 164. [2021-08-21 18:20:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 0 states have call successors, (0), 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 18:20:16,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2021-08-21 18:20:16,031 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 162 [2021-08-21 18:20:16,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:16,031 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2021-08-21 18:20:16,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.5217391304347827) internal successors, (162), 45 states have internal predecessors, (162), 0 states have call successors, (0), 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 18:20:16,032 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2021-08-21 18:20:16,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-08-21 18:20:16,032 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:16,032 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:16,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-21 18:20:16,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:16,249 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:16,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:16,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1111800279, now seen corresponding path program 61 times [2021-08-21 18:20:16,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:16,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669275877] [2021-08-21 18:20:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:16,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 946 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:16,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:16,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669275877] [2021-08-21 18:20:16,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669275877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:16,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990294157] [2021-08-21 18:20:16,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:20:16,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:16,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:16,671 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:20:16,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 18:20:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:26,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 18:20:26,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:20:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 946 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:27,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990294157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:27,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:20:27,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 24 [2021-08-21 18:20:27,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675508462] [2021-08-21 18:20:27,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:20:27,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:20:27,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:20:27,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:20:27,088 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 25 states, 25 states have (on average 6.76) internal successors, (169), 24 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 18:20:27,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:20:27,164 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2021-08-21 18:20:27,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:20:27,164 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.76) internal successors, (169), 24 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) Word has length 163 [2021-08-21 18:20:27,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:20:27,165 INFO L225 Difference]: With dead ends: 262 [2021-08-21 18:20:27,165 INFO L226 Difference]: Without dead ends: 172 [2021-08-21 18:20:27,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:20:27,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-08-21 18:20:27,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 167. [2021-08-21 18:20:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 0 states have call successors, (0), 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 18:20:27,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2021-08-21 18:20:27,167 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 163 [2021-08-21 18:20:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:20:27,167 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2021-08-21 18:20:27,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.76) internal successors, (169), 24 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 18:20:27,167 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2021-08-21 18:20:27,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-08-21 18:20:27,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:20:27,167 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:20:27,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 18:20:27,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-21 18:20:27,379 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:20:27,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:20:27,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1154520646, now seen corresponding path program 62 times [2021-08-21 18:20:27,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:20:27,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002102848] [2021-08-21 18:20:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:20:27,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:20:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:20:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 0 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:20:42,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:20:42,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002102848] [2021-08-21 18:20:42,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002102848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:20:42,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258955847] [2021-08-21 18:20:42,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:20:42,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:20:42,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:20:42,123 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:20:42,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 18:20:52,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:20:52,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:20:52,283 WARN L261 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 262 conjunts are in the unsatisfiable core [2021-08-21 18:20:52,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:15,848 INFO L354 Elim1Store]: treesize reduction 2520, result has 0.0 percent of original size [2021-08-21 18:21:15,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 21 select indices, 21 select index equivalence classes, 0 disjoint index pairs (out of 210 index pairs), introduced 21 new quantified variables, introduced 210 case distinctions, treesize of input 258 treesize of output 90 [2021-08-21 18:21:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 0 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:16,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258955847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:16,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:16,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 92] total 159 [2021-08-21 18:21:16,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135981549] [2021-08-21 18:21:16,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2021-08-21 18:21:16,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:16,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2021-08-21 18:21:16,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=25025, Unknown=0, NotChecked=0, Total=25440 [2021-08-21 18:21:16,615 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 160 states, 160 states have (on average 1.63125) internal successors, (261), 159 states have internal predecessors, (261), 0 states have call successors, (0), 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 18:21:38,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:38,727 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2021-08-21 18:21:38,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-08-21 18:21:38,727 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 1.63125) internal successors, (261), 159 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-08-21 18:21:38,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:38,728 INFO L225 Difference]: With dead ends: 271 [2021-08-21 18:21:38,728 INFO L226 Difference]: Without dead ends: 267 [2021-08-21 18:21:38,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 98 SyntacticMatches, 23 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7984 ImplicationChecksByTransitivity, 34544.9ms TimeCoverageRelationStatistics Valid=744, Invalid=41898, Unknown=0, NotChecked=0, Total=42642 [2021-08-21 18:21:38,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-08-21 18:21:38,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 178. [2021-08-21 18:21:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.0169491525423728) internal successors, (180), 177 states have internal predecessors, (180), 0 states have call successors, (0), 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 18:21:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2021-08-21 18:21:38,732 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 166 [2021-08-21 18:21:38,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:38,732 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2021-08-21 18:21:38,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 1.63125) internal successors, (261), 159 states have internal predecessors, (261), 0 states have call successors, (0), 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 18:21:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2021-08-21 18:21:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-08-21 18:21:38,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:38,733 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:38,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 18:21:38,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:38,951 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:21:38,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:38,951 INFO L82 PathProgramCache]: Analyzing trace with hash 235304201, now seen corresponding path program 63 times [2021-08-21 18:21:38,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:38,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2587364] [2021-08-21 18:21:38,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:38,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:40,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:40,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2587364] [2021-08-21 18:21:40,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2587364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:40,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594752063] [2021-08-21 18:21:40,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:21:40,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:40,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:40,121 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:40,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 18:21:51,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-08-21 18:21:51,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:51,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 92 conjunts are in the unsatisfiable core [2021-08-21 18:21:51,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:51,922 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 11 treesize of output 7 [2021-08-21 18:21:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:51,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594752063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:51,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:51,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2021-08-21 18:21:51,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325805887] [2021-08-21 18:21:51,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 18:21:51,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 18:21:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:21:51,941 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand has 48 states, 48 states have (on average 3.5208333333333335) internal successors, (169), 47 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 18:21:54,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:54,667 INFO L93 Difference]: Finished difference Result 269 states and 271 transitions. [2021-08-21 18:21:54,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 18:21:54,668 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.5208333333333335) internal successors, (169), 47 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) Word has length 169 [2021-08-21 18:21:54,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:54,669 INFO L225 Difference]: With dead ends: 269 [2021-08-21 18:21:54,669 INFO L226 Difference]: Without dead ends: 269 [2021-08-21 18:21:54,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 3023.7ms TimeCoverageRelationStatistics Valid=1041, Invalid=7889, Unknown=0, NotChecked=0, Total=8930 [2021-08-21 18:21:54,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-08-21 18:21:54,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 171. [2021-08-21 18:21:54,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 0 states have call successors, (0), 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 18:21:54,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2021-08-21 18:21:54,671 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 169 [2021-08-21 18:21:54,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:54,671 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2021-08-21 18:21:54,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5208333333333335) internal successors, (169), 47 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 18:21:54,671 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2021-08-21 18:21:54,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-08-21 18:21:54,672 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:54,672 INFO L512 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:54,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:54,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-21 18:21:54,897 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:21:54,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:54,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1526497207, now seen corresponding path program 64 times [2021-08-21 18:21:54,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:54,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333356793] [2021-08-21 18:21:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:54,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 1035 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:55,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:55,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333356793] [2021-08-21 18:21:55,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333356793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:55,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447888980] [2021-08-21 18:21:55,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:21:55,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:55,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:55,253 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:55,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 18:22:06,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:22:06,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:06,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:22:06,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 1035 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:07,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447888980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:07,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:07,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 25 [2021-08-21 18:22:07,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963285652] [2021-08-21 18:22:07,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:22:07,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:07,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:22:07,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:22:07,102 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand has 26 states, 26 states have (on average 6.769230769230769) internal successors, (176), 25 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 18:22:07,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:07,171 INFO L93 Difference]: Finished difference Result 273 states and 275 transitions. [2021-08-21 18:22:07,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:22:07,171 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.769230769230769) internal successors, (176), 25 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) Word has length 170 [2021-08-21 18:22:07,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:07,172 INFO L225 Difference]: With dead ends: 273 [2021-08-21 18:22:07,172 INFO L226 Difference]: Without dead ends: 179 [2021-08-21 18:22:07,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:22:07,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-21 18:22:07,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 174. [2021-08-21 18:22:07,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 173 states have internal predecessors, (175), 0 states have call successors, (0), 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 18:22:07,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2021-08-21 18:22:07,174 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 170 [2021-08-21 18:22:07,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:07,174 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2021-08-21 18:22:07,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.769230769230769) internal successors, (176), 25 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 18:22:07,174 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2021-08-21 18:22:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-08-21 18:22:07,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:07,174 INFO L512 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:07,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:07,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-21 18:22:07,388 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:22:07,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:07,388 INFO L82 PathProgramCache]: Analyzing trace with hash 248923532, now seen corresponding path program 65 times [2021-08-21 18:22:07,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:07,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551263510] [2021-08-21 18:22:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:07,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-08-21 18:22:13,561 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:22:13,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-08-21 18:22:13,561 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 174 with TraceHistMax 23,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 55 known predicates. [2021-08-21 18:22:13,562 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:22:13,562 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:22:13,565 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:22:13,565 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:22:13,566 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:22:13 BasicIcfg [2021-08-21 18:22:13,566 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:22:13,566 INFO L168 Benchmark]: Toolchain (without parser) took 740737.34 ms. Allocated memory was 184.5 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 164.7 MB in the beginning and 596.5 MB in the end (delta: -431.8 MB). Peak memory consumption was 751.5 MB. Max. memory is 8.0 GB. [2021-08-21 18:22:13,566 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 184.5 MB. Free memory is still 165.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:22:13,566 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.58 ms. Allocated memory is still 184.5 MB. Free memory was 164.5 MB in the beginning and 163.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:22:13,567 INFO L168 Benchmark]: Boogie Preprocessor took 13.41 ms. Allocated memory is still 184.5 MB. Free memory was 163.0 MB in the beginning and 162.2 MB in the end (delta: 803.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:22:13,567 INFO L168 Benchmark]: RCFGBuilder took 224.41 ms. Allocated memory is still 184.5 MB. Free memory was 162.0 MB in the beginning and 148.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 18:22:13,567 INFO L168 Benchmark]: TraceAbstraction took 740474.80 ms. Allocated memory was 184.5 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 147.9 MB in the beginning and 596.5 MB in the end (delta: -448.6 MB). Peak memory consumption was 734.7 MB. Max. memory is 8.0 GB. [2021-08-21 18:22:13,567 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 0.13 ms. Allocated memory is still 184.5 MB. Free memory is still 165.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.58 ms. Allocated memory is still 184.5 MB. Free memory was 164.5 MB in the beginning and 163.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.41 ms. Allocated memory is still 184.5 MB. Free memory was 163.0 MB in the beginning and 162.2 MB in the end (delta: 803.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 224.41 ms. Allocated memory is still 184.5 MB. Free memory was 162.0 MB in the beginning and 148.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 740474.80 ms. Allocated memory was 184.5 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 147.9 MB in the beginning and 596.5 MB in the end (delta: -448.6 MB). Peak memory consumption was 734.7 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: 80, positive: 71, positive conditional: 71, positive unconditional: 0, negative: 9, negative conditional: 9, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 71, positive: 71, positive conditional: 0, positive unconditional: 71, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 71, positive: 71, positive conditional: 0, positive unconditional: 71, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 71, positive: 69, positive conditional: 0, positive unconditional: 69, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 21, positive: 21, positive conditional: 0, positive unconditional: 21, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 71, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 71, unknown conditional: 0, unknown unconditional: 71] , Statistics on independence cache: Total cache size (in pairs): 71, Positive cache size: 71, Positive conditional cache size: 0, Positive unconditional cache size: 71, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, 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 - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 174 with TraceHistMax 23,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 55 known predicates. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 174 with TraceHistMax 23,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 55 known predicates. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 174 with TraceHistMax 23,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 55 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 42 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 740403.2ms, OverallIterations: 68, TraceHistogramMax: 23, EmptinessCheckTime: 36.3ms, AutomataDifference: 182666.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 99.6ms, PartialOrderReductionTime: 77.3ms, HoareTripleCheckerStatistics: 2416 SDtfs, 8857 SDslu, 37336 SDs, 0 SdLazy, 162713 SolverSat, 4903 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 76201.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9816 GetRequests, 5646 SyntacticMatches, 315 SemanticMatches, 3855 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74963 ImplicationChecksByTransitivity, 273240.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=178occurred in iteration=65, InterpolantAutomatonStates: 2213, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 147.7ms AutomataMinimizationTime, 67 MinimizatonAttempts, 2388 StatesRemovedByMinimization, 66 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 493.5ms SsaConstructionTime, 2471.8ms SatisfiabilityAnalysisTime, 313141.8ms InterpolantComputationTime, 12533 NumberOfCodeBlocks, 12533 NumberOfCodeBlocksAsserted, 517 NumberOfCheckSat, 12400 ConstructedInterpolants, 20 QuantifiedInterpolants, 345589 SizeOfPredicates, 421 NumberOfNonLiveVariables, 14146 ConjunctsInSsa, 4638 ConjunctsInUnsatCore, 133 InterpolantComputations, 2 PerfectInterpolantSequences, 16741/76626 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown