/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/chl/poker-hand-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:49:02,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:49:02,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:49:02,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 17:49:02,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 17:49:02,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 17:49:02,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 17:49:02,194 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 17:49:02,229 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:49:02,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:49:02,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:49:02,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:49:02,232 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:49:02,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:49:02,233 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:49:02,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:49:02,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:49:02,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:49:02,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:49:02,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:49:02,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:49:02,235 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:49:02,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:49:02,235 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:49:02,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:49:02,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:49:02,236 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:49:02,236 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:49:02,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:49:02,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:49:02,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:49:02,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:49:02,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:49:02,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:49:02,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:49:02,237 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:49:02,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:49:02,238 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:49:02,238 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:49:02,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:49:02,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:49:02,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:49:02,602 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 17:49:02,603 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 17:49:02,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl [2021-08-21 17:49:02,605 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl' [2021-08-21 17:49:02,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:49:02,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 17:49:02,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:49:02,654 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:49:02,654 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:49:02,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:49:02" (1/1) ... [2021-08-21 17:49:02,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:49:02" (1/1) ... [2021-08-21 17:49:02,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:49:02,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:49:02,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:49:02,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:49:02,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:49:02" (1/1) ... [2021-08-21 17:49:02,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:49:02" (1/1) ... [2021-08-21 17:49:02,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:49:02" (1/1) ... [2021-08-21 17:49:02,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:49:02" (1/1) ... [2021-08-21 17:49:02,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:49:02" (1/1) ... [2021-08-21 17:49:02,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:49:02" (1/1) ... [2021-08-21 17:49:02,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:49:02" (1/1) ... [2021-08-21 17:49:02,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:49:02,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:49:02,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:49:02,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:49:02,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:49:02" (1/1) ... [2021-08-21 17:49:02,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:49:02,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:02,764 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 17:49:02,788 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 17:49:02,805 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 17:49:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 17:49:02,806 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 17:49:02,806 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 17:49:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 17:49:02,806 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 17:49:02,806 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 17:49:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:49:02,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:49:02,807 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 17:49:03,419 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:49:03,420 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-21 17:49:03,422 INFO L202 PluginConnector]: Adding new model poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:49:03 BoogieIcfgContainer [2021-08-21 17:49:03,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:49:03,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:49:03,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:49:03,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:49:03,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:49:02" (1/2) ... [2021-08-21 17:49:03,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b6803b and model type poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:49:03, skipping insertion in model container [2021-08-21 17:49:03,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:49:03" (2/2) ... [2021-08-21 17:49:03,432 INFO L111 eAbstractionObserver]: Analyzing ICFG poker-hand-symm.wvr.bpl [2021-08-21 17:49:03,436 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:49:03,437 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:49:03,437 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:49:03,437 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:49:03,473 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 17:49:03,514 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:49:03,520 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 17:49:03,520 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 17:49:03,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 38 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:03,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 17:49:03,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:03,583 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:03,583 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:03,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:03,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1483682293, now seen corresponding path program 1 times [2021-08-21 17:49:03,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:03,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301970871] [2021-08-21 17:49:03,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:03,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:06,319 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 17:49:06,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:06,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301970871] [2021-08-21 17:49:06,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301970871] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:49:06,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:49:06,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 17:49:06,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79438087] [2021-08-21 17:49:06,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:49:06,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:06,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:49:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:49:06,384 INFO L87 Difference]: Start difference. First operand has 39 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 38 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:06,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:06,715 INFO L93 Difference]: Finished difference Result 66 states and 97 transitions. [2021-08-21 17:49:06,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:49:06,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-21 17:49:06,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:06,723 INFO L225 Difference]: With dead ends: 66 [2021-08-21 17:49:06,724 INFO L226 Difference]: Without dead ends: 25 [2021-08-21 17:49:06,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 470.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:49:06,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-21 17:49:06,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2021-08-21 17:49:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:06,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 25 transitions. [2021-08-21 17:49:06,750 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 25 transitions. Word has length 10 [2021-08-21 17:49:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:06,751 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 25 transitions. [2021-08-21 17:49:06,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 25 transitions. [2021-08-21 17:49:06,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 17:49:06,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:06,752 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:06,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:49:06,752 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:06,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:06,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1172848206, now seen corresponding path program 1 times [2021-08-21 17:49:06,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:06,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932190452] [2021-08-21 17:49:06,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:06,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:06,778 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 17:49:06,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:06,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932190452] [2021-08-21 17:49:06,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932190452] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:49:06,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:49:06,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:49:06,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148225539] [2021-08-21 17:49:06,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:49:06,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:06,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:49:06,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:49:06,782 INFO L87 Difference]: Start difference. First operand 17 states and 25 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:06,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:06,787 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2021-08-21 17:49:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:49:06,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-21 17:49:06,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:06,788 INFO L225 Difference]: With dead ends: 18 [2021-08-21 17:49:06,789 INFO L226 Difference]: Without dead ends: 18 [2021-08-21 17:49:06,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:49:06,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-21 17:49:06,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-21 17:49:06,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 17:49:06,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2021-08-21 17:49:06,792 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 11 [2021-08-21 17:49:06,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:06,792 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2021-08-21 17:49:06,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:06,793 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2021-08-21 17:49:06,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 17:49:06,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:06,793 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:06,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 17:49:06,794 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:06,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:06,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1443952883, now seen corresponding path program 1 times [2021-08-21 17:49:06,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:06,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322959248] [2021-08-21 17:49:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:06,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:06,815 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 17:49:06,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:06,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322959248] [2021-08-21 17:49:06,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322959248] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:49:06,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:49:06,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:49:06,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242254984] [2021-08-21 17:49:06,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:49:06,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:06,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:49:06,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:49:06,818 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:06,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:06,824 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2021-08-21 17:49:06,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:49:06,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-21 17:49:06,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:06,825 INFO L225 Difference]: With dead ends: 19 [2021-08-21 17:49:06,825 INFO L226 Difference]: Without dead ends: 19 [2021-08-21 17:49:06,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:49:06,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-21 17:49:06,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-21 17:49:06,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 17:49:06,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 27 transitions. [2021-08-21 17:49:06,828 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 27 transitions. Word has length 11 [2021-08-21 17:49:06,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:06,828 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 27 transitions. [2021-08-21 17:49:06,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:06,829 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 27 transitions. [2021-08-21 17:49:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 17:49:06,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:06,829 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:06,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 17:49:06,830 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:06,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:06,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1150346156, now seen corresponding path program 1 times [2021-08-21 17:49:06,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:06,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992367024] [2021-08-21 17:49:06,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:06,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:06,851 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 17:49:06,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:06,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992367024] [2021-08-21 17:49:06,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992367024] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:49:06,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:49:06,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:49:06,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229419729] [2021-08-21 17:49:06,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:49:06,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:06,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:49:06,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:49:06,854 INFO L87 Difference]: Start difference. First operand 19 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:06,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:06,859 INFO L93 Difference]: Finished difference Result 20 states and 28 transitions. [2021-08-21 17:49:06,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:49:06,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-21 17:49:06,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:06,860 INFO L225 Difference]: With dead ends: 20 [2021-08-21 17:49:06,861 INFO L226 Difference]: Without dead ends: 20 [2021-08-21 17:49:06,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:49:06,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-21 17:49:06,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-21 17:49:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 17:49:06,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2021-08-21 17:49:06,864 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2021-08-21 17:49:06,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:06,864 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2021-08-21 17:49:06,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:06,864 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2021-08-21 17:49:06,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 17:49:06,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:06,865 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:06,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 17:49:06,865 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:06,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:06,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2095108139, now seen corresponding path program 1 times [2021-08-21 17:49:06,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:06,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203140478] [2021-08-21 17:49:06,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:06,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:06,887 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 17:49:06,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:06,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203140478] [2021-08-21 17:49:06,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203140478] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:49:06,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:49:06,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:49:06,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83089655] [2021-08-21 17:49:06,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:49:06,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:06,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:49:06,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:49:06,889 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:06,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:06,894 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2021-08-21 17:49:06,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:49:06,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-21 17:49:06,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:06,895 INFO L225 Difference]: With dead ends: 21 [2021-08-21 17:49:06,895 INFO L226 Difference]: Without dead ends: 21 [2021-08-21 17:49:06,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:49:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-21 17:49:06,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-21 17:49:06,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2021-08-21 17:49:06,898 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 11 [2021-08-21 17:49:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:06,898 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2021-08-21 17:49:06,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:06,899 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2021-08-21 17:49:06,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 17:49:06,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:06,899 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:06,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 17:49:06,900 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:06,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:06,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1000469992, now seen corresponding path program 1 times [2021-08-21 17:49:06,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:06,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107439819] [2021-08-21 17:49:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:06,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:49:06,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:06,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107439819] [2021-08-21 17:49:06,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107439819] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:49:06,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:49:06,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:49:06,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780916381] [2021-08-21 17:49:06,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:49:06,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:06,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:49:06,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:49:06,968 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:06,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:06,997 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-08-21 17:49:06,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:49:06,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 17:49:06,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:06,998 INFO L225 Difference]: With dead ends: 29 [2021-08-21 17:49:06,998 INFO L226 Difference]: Without dead ends: 29 [2021-08-21 17:49:06,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:49:06,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-21 17:49:07,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2021-08-21 17:49:07,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:07,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-08-21 17:49:07,001 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 12 [2021-08-21 17:49:07,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:07,002 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-08-21 17:49:07,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:07,002 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-08-21 17:49:07,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 17:49:07,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:07,002 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:07,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 17:49:07,003 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:07,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:07,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1326271753, now seen corresponding path program 1 times [2021-08-21 17:49:07,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:07,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817311238] [2021-08-21 17:49:07,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:07,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:49:07,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:07,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817311238] [2021-08-21 17:49:07,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817311238] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:49:07,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:49:07,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:49:07,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569441093] [2021-08-21 17:49:07,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:49:07,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:07,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:49:07,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:49:07,029 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:07,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:07,043 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-08-21 17:49:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:49:07,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 17:49:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:07,044 INFO L225 Difference]: With dead ends: 29 [2021-08-21 17:49:07,044 INFO L226 Difference]: Without dead ends: 29 [2021-08-21 17:49:07,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:49:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-21 17:49:07,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2021-08-21 17:49:07,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:07,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-08-21 17:49:07,047 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-08-21 17:49:07,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:07,047 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-08-21 17:49:07,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:07,048 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-08-21 17:49:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 17:49:07,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:07,048 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:07,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 17:49:07,049 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:07,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2069371544, now seen corresponding path program 1 times [2021-08-21 17:49:07,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:07,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799133670] [2021-08-21 17:49:07,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:07,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:49:07,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:07,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799133670] [2021-08-21 17:49:07,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799133670] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:49:07,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:49:07,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:49:07,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58291981] [2021-08-21 17:49:07,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:49:07,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:07,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:49:07,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:49:07,088 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:07,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:07,098 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-08-21 17:49:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:49:07,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 17:49:07,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:07,099 INFO L225 Difference]: With dead ends: 29 [2021-08-21 17:49:07,099 INFO L226 Difference]: Without dead ends: 29 [2021-08-21 17:49:07,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:49:07,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-21 17:49:07,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2021-08-21 17:49:07,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 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 17:49:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-08-21 17:49:07,102 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-08-21 17:49:07,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:07,102 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-08-21 17:49:07,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:07,102 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-08-21 17:49:07,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 17:49:07,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:07,103 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:07,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 17:49:07,103 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:07,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:07,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1349480247, now seen corresponding path program 1 times [2021-08-21 17:49:07,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:07,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912633859] [2021-08-21 17:49:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:07,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:49:07,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:07,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912633859] [2021-08-21 17:49:07,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912633859] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:49:07,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:49:07,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:49:07,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977960991] [2021-08-21 17:49:07,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:49:07,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:07,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:49:07,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:49:07,176 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:07,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:07,195 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-08-21 17:49:07,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:49:07,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 17:49:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:07,198 INFO L225 Difference]: With dead ends: 29 [2021-08-21 17:49:07,198 INFO L226 Difference]: Without dead ends: 27 [2021-08-21 17:49:07,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:49:07,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-21 17:49:07,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-08-21 17:49:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:07,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-08-21 17:49:07,201 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2021-08-21 17:49:07,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:07,201 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-08-21 17:49:07,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:07,201 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-08-21 17:49:07,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:49:07,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:07,202 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:07,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 17:49:07,202 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:07,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:07,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2080950938, now seen corresponding path program 1 times [2021-08-21 17:49:07,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:07,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778653602] [2021-08-21 17:49:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:07,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:07,838 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 17:49:07,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:07,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778653602] [2021-08-21 17:49:07,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778653602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:07,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356466574] [2021-08-21 17:49:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:07,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:07,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:07,849 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 17:49:07,853 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 17:49:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:07,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 17:49:07,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:09,231 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 591 treesize of output 523 [2021-08-21 17:49:09,246 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 523 treesize of output 439 [2021-08-21 17:49:10,476 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 17:49:10,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356466574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:10,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:10,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 17:49:10,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120964076] [2021-08-21 17:49:10,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:49:10,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:10,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:49:10,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:49:10,480 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:11,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:11,279 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-08-21 17:49:11,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:49:11,280 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:49:11,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:11,280 INFO L225 Difference]: With dead ends: 26 [2021-08-21 17:49:11,280 INFO L226 Difference]: Without dead ends: 15 [2021-08-21 17:49:11,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1141.1ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:49:11,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-21 17:49:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-21 17:49:11,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-08-21 17:49:11,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2021-08-21 17:49:11,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:11,283 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-08-21 17:49:11,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-08-21 17:49:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:49:11,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:11,283 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:11,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 17:49:11,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-21 17:49:11,505 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:11,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:11,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1057004774, now seen corresponding path program 1 times [2021-08-21 17:49:11,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:11,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260296062] [2021-08-21 17:49:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:11,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:11,948 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 17:49:11,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:11,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260296062] [2021-08-21 17:49:11,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260296062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:11,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542365853] [2021-08-21 17:49:11,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:11,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:11,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:11,950 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 17:49:11,951 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 17:49:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:12,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 17:49:12,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:12,998 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 304 treesize of output 260 [2021-08-21 17:49:13,001 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 260 treesize of output 220 [2021-08-21 17:49:13,471 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 17:49:13,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542365853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:13,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:13,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 17:49:13,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654592435] [2021-08-21 17:49:13,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:49:13,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:13,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:49:13,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:49:13,473 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:13,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:13,852 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-08-21 17:49:13,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:49:13,853 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:49:13,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:13,853 INFO L225 Difference]: With dead ends: 25 [2021-08-21 17:49:13,853 INFO L226 Difference]: Without dead ends: 17 [2021-08-21 17:49:13,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 675.7ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:49:13,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-21 17:49:13,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-08-21 17:49:13,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-08-21 17:49:13,855 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2021-08-21 17:49:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:13,855 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-08-21 17:49:13,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-08-21 17:49:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:49:13,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:13,856 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:13,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-21 17:49:14,060 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,SelfDestructingSolverStorable10 [2021-08-21 17:49:14,061 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:14,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:14,062 INFO L82 PathProgramCache]: Analyzing trace with hash 88225520, now seen corresponding path program 2 times [2021-08-21 17:49:14,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:14,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067414578] [2021-08-21 17:49:14,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:14,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:14,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:14,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067414578] [2021-08-21 17:49:14,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067414578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:14,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095749907] [2021-08-21 17:49:14,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:49:14,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:14,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:14,179 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 17:49:14,180 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 17:49:14,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:49:14,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:14,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:49:14,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:14,539 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 52 treesize of output 44 [2021-08-21 17:49:14,542 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 44 treesize of output 36 [2021-08-21 17:49:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:14,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095749907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:14,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:14,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 17:49:14,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715439186] [2021-08-21 17:49:14,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:49:14,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:14,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:49:14,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:49:14,579 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 17:49:14,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:14,607 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-08-21 17:49:14,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:49:14,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 17:49:14,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:14,607 INFO L225 Difference]: With dead ends: 17 [2021-08-21 17:49:14,607 INFO L226 Difference]: Without dead ends: 17 [2021-08-21 17:49:14,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:49:14,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-21 17:49:14,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-21 17:49:14,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-08-21 17:49:14,609 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2021-08-21 17:49:14,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:14,609 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-08-21 17:49:14,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 17:49:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-08-21 17:49:14,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:49:14,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:14,610 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:14,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-21 17:49:14,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:14,813 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:14,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:14,813 INFO L82 PathProgramCache]: Analyzing trace with hash -791597100, now seen corresponding path program 3 times [2021-08-21 17:49:14,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:14,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980234086] [2021-08-21 17:49:14,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:14,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:15,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:15,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980234086] [2021-08-21 17:49:15,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980234086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:15,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102764015] [2021-08-21 17:49:15,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:49:15,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:15,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:15,379 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 17:49:15,380 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 17:49:15,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 17:49:15,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:15,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 17:49:15,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:17,907 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:49:17,908 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 345 treesize of output 304 [2021-08-21 17:49:17,915 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:49:17,915 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 301 treesize of output 256 [2021-08-21 17:49:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:18,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102764015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:18,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:18,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 17:49:18,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118589247] [2021-08-21 17:49:18,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:49:18,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:18,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:49:18,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:49:18,378 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 17:49:18,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:18,707 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-08-21 17:49:18,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:49:18,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 16 [2021-08-21 17:49:18,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:18,707 INFO L225 Difference]: With dead ends: 27 [2021-08-21 17:49:18,708 INFO L226 Difference]: Without dead ends: 18 [2021-08-21 17:49:18,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 595.7ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:49:18,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-21 17:49:18,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-21 17:49:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:18,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-08-21 17:49:18,709 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-08-21 17:49:18,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:18,710 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-08-21 17:49:18,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 17:49:18,710 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-08-21 17:49:18,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:49:18,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:18,710 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:18,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-21 17:49:18,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:18,917 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:18,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:18,917 INFO L82 PathProgramCache]: Analyzing trace with hash 263087658, now seen corresponding path program 4 times [2021-08-21 17:49:18,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:18,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696480753] [2021-08-21 17:49:18,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:18,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:19,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:19,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696480753] [2021-08-21 17:49:19,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696480753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:19,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770109748] [2021-08-21 17:49:19,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:49:19,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:19,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:19,074 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 17:49:19,074 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 17:49:19,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:49:19,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:19,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 17:49:19,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:19,679 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 63 treesize of output 55 [2021-08-21 17:49:19,681 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 55 treesize of output 47 [2021-08-21 17:49:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:19,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770109748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:19,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:19,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:49:19,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462741825] [2021-08-21 17:49:19,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:49:19,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:19,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:49:19,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:49:19,721 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:19,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:19,779 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-08-21 17:49:19,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:49:19,779 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 17:49:19,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:19,780 INFO L225 Difference]: With dead ends: 19 [2021-08-21 17:49:19,780 INFO L226 Difference]: Without dead ends: 19 [2021-08-21 17:49:19,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:49:19,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-21 17:49:19,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-21 17:49:19,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-08-21 17:49:19,782 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2021-08-21 17:49:19,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:19,783 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-08-21 17:49:19,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:19,783 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-08-21 17:49:19,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:49:19,783 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:19,783 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:19,801 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 17:49:19,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 17:49:19,989 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:19,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:19,989 INFO L82 PathProgramCache]: Analyzing trace with hash 334161882, now seen corresponding path program 5 times [2021-08-21 17:49:19,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:19,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670314318] [2021-08-21 17:49:19,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:19,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:20,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:20,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670314318] [2021-08-21 17:49:20,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670314318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:20,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977291452] [2021-08-21 17:49:20,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:49:20,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:20,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:20,578 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 17:49:20,578 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 17:49:20,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:49:20,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:20,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 17:49:20,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:23,344 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:49:23,345 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 345 treesize of output 300 [2021-08-21 17:49:23,376 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:49:23,376 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 297 treesize of output 256 [2021-08-21 17:49:23,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:23,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977291452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:23,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:23,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-21 17:49:23,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3424316] [2021-08-21 17:49:23,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:49:23,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:23,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:49:23,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:49:23,811 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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 17:49:24,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:24,125 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-08-21 17:49:24,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:49:24,126 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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 18 [2021-08-21 17:49:24,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:24,126 INFO L225 Difference]: With dead ends: 31 [2021-08-21 17:49:24,126 INFO L226 Difference]: Without dead ends: 21 [2021-08-21 17:49:24,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 614.2ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:49:24,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-21 17:49:24,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-08-21 17:49:24,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:24,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-08-21 17:49:24,128 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2021-08-21 17:49:24,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:24,128 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-08-21 17:49:24,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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 17:49:24,128 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-08-21 17:49:24,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:49:24,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:24,129 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:24,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-21 17:49:24,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 17:49:24,345 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:24,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:24,345 INFO L82 PathProgramCache]: Analyzing trace with hash 273932464, now seen corresponding path program 6 times [2021-08-21 17:49:24,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:24,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685892813] [2021-08-21 17:49:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:24,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:24,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:24,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685892813] [2021-08-21 17:49:24,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685892813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:24,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748790683] [2021-08-21 17:49:24,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:49:24,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:24,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:24,605 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 17:49:24,606 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 17:49:25,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:49:25,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:25,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:49:25,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:25,358 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 52 treesize of output 44 [2021-08-21 17:49:25,361 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 44 treesize of output 36 [2021-08-21 17:49:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:25,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748790683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:25,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:25,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-21 17:49:25,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515539185] [2021-08-21 17:49:25,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:49:25,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:25,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:49:25,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:49:25,385 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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 17:49:25,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:25,488 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-08-21 17:49:25,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:49:25,488 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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 19 [2021-08-21 17:49:25,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:25,488 INFO L225 Difference]: With dead ends: 21 [2021-08-21 17:49:25,488 INFO L226 Difference]: Without dead ends: 21 [2021-08-21 17:49:25,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:49:25,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-21 17:49:25,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-21 17:49:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 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 17:49:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-08-21 17:49:25,490 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2021-08-21 17:49:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:25,490 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-08-21 17:49:25,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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 17:49:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-08-21 17:49:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:49:25,491 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:25,491 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:25,518 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 17:49:25,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:25,705 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:25,705 INFO L82 PathProgramCache]: Analyzing trace with hash 670350868, now seen corresponding path program 7 times [2021-08-21 17:49:25,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:25,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059289577] [2021-08-21 17:49:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:25,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:26,486 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 17:49:26,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:26,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059289577] [2021-08-21 17:49:26,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059289577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:26,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752228785] [2021-08-21 17:49:26,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:49:26,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:26,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:26,495 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 17:49:26,496 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 17:49:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:26,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 17:49:26,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:27,852 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 257 treesize of output 221 [2021-08-21 17:49:27,855 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 221 treesize of output 185 [2021-08-21 17:49:28,142 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 17:49:28,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752228785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:28,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:28,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 17:49:28,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169742303] [2021-08-21 17:49:28,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:49:28,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:28,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:49:28,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:49:28,144 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 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 17:49:29,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:29,109 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-08-21 17:49:29,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:49:29,109 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 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 20 [2021-08-21 17:49:29,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:29,109 INFO L225 Difference]: With dead ends: 40 [2021-08-21 17:49:29,110 INFO L226 Difference]: Without dead ends: 36 [2021-08-21 17:49:29,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1551.7ms TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:49:29,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-21 17:49:29,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2021-08-21 17:49:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 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 17:49:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-08-21 17:49:29,112 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2021-08-21 17:49:29,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:29,112 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-08-21 17:49:29,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 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 17:49:29,112 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-08-21 17:49:29,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:29,113 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:29,113 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:29,141 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 17:49:29,340 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,SelfDestructingSolverStorable16 [2021-08-21 17:49:29,341 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:29,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:29,341 INFO L82 PathProgramCache]: Analyzing trace with hash 74419504, now seen corresponding path program 8 times [2021-08-21 17:49:29,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:29,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790198707] [2021-08-21 17:49:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:29,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:29,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:29,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790198707] [2021-08-21 17:49:29,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790198707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:29,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331273012] [2021-08-21 17:49:29,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:49:29,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:29,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:29,569 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 17:49:29,570 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 17:49:30,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:49:30,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:30,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:49:30,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:30,646 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 53 treesize of output 45 [2021-08-21 17:49:30,648 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 45 treesize of output 37 [2021-08-21 17:49:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:30,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331273012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:30,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:30,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-08-21 17:49:30,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468015994] [2021-08-21 17:49:30,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:49:30,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:30,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:49:30,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:49:30,685 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 17:49:30,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:30,921 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-08-21 17:49:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:49:30,921 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:49:30,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:30,921 INFO L225 Difference]: With dead ends: 29 [2021-08-21 17:49:30,921 INFO L226 Difference]: Without dead ends: 22 [2021-08-21 17:49:30,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 388.2ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:49:30,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-21 17:49:30,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-21 17:49:30,923 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 17:49:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-08-21 17:49:30,923 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 21 [2021-08-21 17:49:30,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:30,924 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-08-21 17:49:30,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 17:49:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-08-21 17:49:30,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:49:30,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:30,924 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:30,945 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 17:49:31,129 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,SelfDestructingSolverStorable17 [2021-08-21 17:49:31,129 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:31,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:31,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1375544982, now seen corresponding path program 9 times [2021-08-21 17:49:31,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:31,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975356182] [2021-08-21 17:49:31,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:31,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:31,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:31,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975356182] [2021-08-21 17:49:31,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975356182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:31,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695967000] [2021-08-21 17:49:31,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:49:31,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:31,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:31,350 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 17:49:31,350 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 17:49:31,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:49:31,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:31,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:49:31,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:32,246 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 52 treesize of output 44 [2021-08-21 17:49:32,248 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 44 treesize of output 36 [2021-08-21 17:49:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:32,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695967000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:32,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:32,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-08-21 17:49:32,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829102563] [2021-08-21 17:49:32,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:49:32,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:32,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:49:32,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:49:32,272 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:32,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:32,367 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-08-21 17:49:32,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:49:32,367 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:49:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:32,367 INFO L225 Difference]: With dead ends: 23 [2021-08-21 17:49:32,367 INFO L226 Difference]: Without dead ends: 23 [2021-08-21 17:49:32,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:49:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-21 17:49:32,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-08-21 17:49:32,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:32,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-08-21 17:49:32,369 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2021-08-21 17:49:32,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:32,369 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-08-21 17:49:32,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:32,369 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-08-21 17:49:32,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:49:32,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:32,370 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:32,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-21 17:49:32,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:32,573 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:32,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:32,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1076157594, now seen corresponding path program 10 times [2021-08-21 17:49:32,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:32,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602519815] [2021-08-21 17:49:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:32,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:33,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:33,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602519815] [2021-08-21 17:49:33,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602519815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:33,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645959551] [2021-08-21 17:49:33,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:49:33,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:33,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:33,466 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 17:49:33,466 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 17:49:34,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:49:34,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:34,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 17:49:34,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:35,322 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 285 treesize of output 237 [2021-08-21 17:49:35,324 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 237 treesize of output 205 [2021-08-21 17:49:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:35,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645959551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:35,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:35,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-08-21 17:49:35,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563345058] [2021-08-21 17:49:35,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:49:35,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:35,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:49:35,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:49:35,622 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:37,315 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-08-21 17:49:37,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:49:37,315 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 17:49:37,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:37,315 INFO L225 Difference]: With dead ends: 37 [2021-08-21 17:49:37,316 INFO L226 Difference]: Without dead ends: 25 [2021-08-21 17:49:37,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2374.2ms TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:49:37,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-21 17:49:37,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-08-21 17:49:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-08-21 17:49:37,318 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2021-08-21 17:49:37,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:37,318 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-08-21 17:49:37,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:37,318 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-08-21 17:49:37,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 17:49:37,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:37,319 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:37,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 17:49:37,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:37,541 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:37,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:37,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2065267312, now seen corresponding path program 11 times [2021-08-21 17:49:37,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:37,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104557872] [2021-08-21 17:49:37,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:37,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:37,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:37,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104557872] [2021-08-21 17:49:37,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104557872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:37,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176386587] [2021-08-21 17:49:37,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:49:37,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:37,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:37,833 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 17:49:37,860 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 17:49:38,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:49:38,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:38,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 17:49:38,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:38,824 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 52 treesize of output 44 [2021-08-21 17:49:38,826 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 44 treesize of output 36 [2021-08-21 17:49:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:38,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176386587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:38,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:38,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-21 17:49:38,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761094851] [2021-08-21 17:49:38,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:49:38,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:38,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:49:38,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:49:38,851 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 17:49:38,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:38,971 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-08-21 17:49:38,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:49:38,972 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 17:49:38,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:38,972 INFO L225 Difference]: With dead ends: 25 [2021-08-21 17:49:38,972 INFO L226 Difference]: Without dead ends: 25 [2021-08-21 17:49:38,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:49:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-21 17:49:38,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-08-21 17:49:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 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 17:49:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-08-21 17:49:38,974 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2021-08-21 17:49:38,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:38,974 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-08-21 17:49:38,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 17:49:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-08-21 17:49:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:49:38,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:38,975 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:38,994 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 17:49:39,176 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,SelfDestructingSolverStorable20 [2021-08-21 17:49:39,177 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:39,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:39,177 INFO L82 PathProgramCache]: Analyzing trace with hash 367156308, now seen corresponding path program 12 times [2021-08-21 17:49:39,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:39,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628245922] [2021-08-21 17:49:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:39,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:40,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:40,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628245922] [2021-08-21 17:49:40,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628245922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:40,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274245310] [2021-08-21 17:49:40,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:49:40,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:40,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:40,068 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 17:49:40,069 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 17:49:40,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:49:40,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:40,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-21 17:49:40,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:43,397 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:49:43,397 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 310 treesize of output 273 [2021-08-21 17:49:43,405 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:49:43,405 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 270 treesize of output 229 [2021-08-21 17:49:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:43,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274245310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:43,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:43,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-08-21 17:49:43,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56667539] [2021-08-21 17:49:43,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:49:43,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:43,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:49:43,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:49:43,736 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 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 17:49:45,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:45,050 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-08-21 17:49:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:49:45,052 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 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) Word has length 24 [2021-08-21 17:49:45,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:45,052 INFO L225 Difference]: With dead ends: 46 [2021-08-21 17:49:45,052 INFO L226 Difference]: Without dead ends: 42 [2021-08-21 17:49:45,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1936.0ms TimeCoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:49:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-21 17:49:45,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2021-08-21 17:49:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-08-21 17:49:45,055 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2021-08-21 17:49:45,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:45,055 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-08-21 17:49:45,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 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 17:49:45,055 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-08-21 17:49:45,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:49:45,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:45,056 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:45,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-21 17:49:45,268 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,SelfDestructingSolverStorable21 [2021-08-21 17:49:45,269 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:45,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:45,269 INFO L82 PathProgramCache]: Analyzing trace with hash -734677264, now seen corresponding path program 13 times [2021-08-21 17:49:45,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:45,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302578847] [2021-08-21 17:49:45,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:45,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:45,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:45,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302578847] [2021-08-21 17:49:45,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302578847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:45,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2992641] [2021-08-21 17:49:45,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:49:45,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:45,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:45,601 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 17:49:45,602 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 17:49:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:46,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:49:46,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:47,048 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 53 treesize of output 45 [2021-08-21 17:49:47,050 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 45 treesize of output 37 [2021-08-21 17:49:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:47,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2992641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:47,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:47,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 23 [2021-08-21 17:49:47,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138016150] [2021-08-21 17:49:47,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:49:47,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:47,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:49:47,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:49:47,082 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 17:49:47,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:47,428 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-08-21 17:49:47,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:49:47,437 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 25 [2021-08-21 17:49:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:47,437 INFO L225 Difference]: With dead ends: 35 [2021-08-21 17:49:47,437 INFO L226 Difference]: Without dead ends: 26 [2021-08-21 17:49:47,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 592.7ms TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:49:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-21 17:49:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-08-21 17:49:47,439 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 17:49:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-08-21 17:49:47,439 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 25 [2021-08-21 17:49:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:47,440 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-08-21 17:49:47,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 17:49:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-08-21 17:49:47,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:49:47,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:47,440 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:47,467 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 17:49:47,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:47,655 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:47,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:47,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1713822890, now seen corresponding path program 14 times [2021-08-21 17:49:47,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:47,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565218194] [2021-08-21 17:49:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:47,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:47,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:47,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565218194] [2021-08-21 17:49:47,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565218194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:47,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934529257] [2021-08-21 17:49:47,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:49:47,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:47,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:47,978 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 17:49:47,979 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 17:49:48,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:49:48,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:48,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:49:48,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:49,287 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 52 treesize of output 44 [2021-08-21 17:49:49,289 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 44 treesize of output 36 [2021-08-21 17:49:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:49,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934529257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:49,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:49,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 22 [2021-08-21 17:49:49,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327141917] [2021-08-21 17:49:49,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:49:49,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:49,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:49:49,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:49:49,314 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:49,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:49,460 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-08-21 17:49:49,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:49:49,460 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:49:49,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:49,461 INFO L225 Difference]: With dead ends: 27 [2021-08-21 17:49:49,461 INFO L226 Difference]: Without dead ends: 27 [2021-08-21 17:49:49,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 359.7ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:49:49,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-21 17:49:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-21 17:49:49,462 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 17:49:49,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-08-21 17:49:49,462 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 25 [2021-08-21 17:49:49,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:49,463 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-08-21 17:49:49,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-08-21 17:49:49,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 17:49:49,463 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:49,463 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:49,486 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 17:49:49,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:49,677 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:49,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:49,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1937686182, now seen corresponding path program 15 times [2021-08-21 17:49:49,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:49,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473625907] [2021-08-21 17:49:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:49,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:50,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:50,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473625907] [2021-08-21 17:49:50,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473625907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:50,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957336828] [2021-08-21 17:49:50,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:49:50,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:50,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:50,828 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 17:49:50,828 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 17:49:51,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:49:51,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:51,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 17:49:51,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:53,898 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 388 treesize of output 332 [2021-08-21 17:49:53,901 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 332 treesize of output 288 [2021-08-21 17:49:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:54,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957336828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:54,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:54,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 28 [2021-08-21 17:49:54,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660300571] [2021-08-21 17:49:54,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 17:49:54,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:54,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 17:49:54,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:49:54,266 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 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 17:49:55,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:55,441 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-08-21 17:49:55,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:49:55,441 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 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 26 [2021-08-21 17:49:55,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:55,442 INFO L225 Difference]: With dead ends: 42 [2021-08-21 17:49:55,442 INFO L226 Difference]: Without dead ends: 28 [2021-08-21 17:49:55,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1995.8ms TimeCoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:49:55,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-21 17:49:55,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-21 17:49:55,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:55,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-08-21 17:49:55,444 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2021-08-21 17:49:55,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:55,444 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-08-21 17:49:55,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 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 17:49:55,444 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-08-21 17:49:55,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 17:49:55,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:55,445 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:55,465 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 17:49:55,652 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,SelfDestructingSolverStorable24 [2021-08-21 17:49:55,653 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:55,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:55,653 INFO L82 PathProgramCache]: Analyzing trace with hash -576256976, now seen corresponding path program 16 times [2021-08-21 17:49:55,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:55,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538210709] [2021-08-21 17:49:55,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:55,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:56,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:56,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538210709] [2021-08-21 17:49:56,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538210709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:56,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977639682] [2021-08-21 17:49:56,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:49:56,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:56,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:56,016 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 17:49:56,017 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 17:49:57,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:49:57,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:57,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 17:49:57,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:57,553 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 52 treesize of output 44 [2021-08-21 17:49:57,555 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 44 treesize of output 36 [2021-08-21 17:49:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:57,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977639682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:57,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:57,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 25 [2021-08-21 17:49:57,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197118818] [2021-08-21 17:49:57,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:49:57,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:57,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:49:57,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:49:57,579 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:57,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:57,810 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-08-21 17:49:57,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:49:57,810 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 17:49:57,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:57,810 INFO L225 Difference]: With dead ends: 29 [2021-08-21 17:49:57,810 INFO L226 Difference]: Without dead ends: 29 [2021-08-21 17:49:57,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 433.4ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:49:57,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-21 17:49:57,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-21 17:49:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:57,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-08-21 17:49:57,812 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2021-08-21 17:49:57,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:57,812 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-08-21 17:49:57,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:57,813 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-08-21 17:49:57,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:49:57,813 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:57,813 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:57,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 17:49:58,028 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,SelfDestructingSolverStorable25 [2021-08-21 17:49:58,029 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:58,029 INFO L82 PathProgramCache]: Analyzing trace with hash 84282004, now seen corresponding path program 17 times [2021-08-21 17:49:58,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:58,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602187695] [2021-08-21 17:49:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:58,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:59,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:59,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602187695] [2021-08-21 17:49:59,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602187695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:59,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023871521] [2021-08-21 17:49:59,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:49:59,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:59,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:59,172 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 17:49:59,173 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 17:50:00,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:50:00,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:00,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 17:50:00,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:02,601 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 310 treesize of output 266 [2021-08-21 17:50:02,603 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 266 treesize of output 226 [2021-08-21 17:50:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:02,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023871521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:02,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:02,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2021-08-21 17:50:02,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916941728] [2021-08-21 17:50:02,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:50:02,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:02,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:50:02,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:50:02,968 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 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 17:50:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:04,168 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-08-21 17:50:04,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:50:04,169 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 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) Word has length 28 [2021-08-21 17:50:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:04,169 INFO L225 Difference]: With dead ends: 45 [2021-08-21 17:50:04,169 INFO L226 Difference]: Without dead ends: 30 [2021-08-21 17:50:04,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2143.6ms TimeCoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 17:50:04,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-21 17:50:04,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-21 17:50:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-08-21 17:50:04,171 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2021-08-21 17:50:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:04,171 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-08-21 17:50:04,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 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 17:50:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-08-21 17:50:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:50:04,172 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:04,172 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:04,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 17:50:04,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 17:50:04,393 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:04,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:04,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1547276310, now seen corresponding path program 18 times [2021-08-21 17:50:04,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:04,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138809495] [2021-08-21 17:50:04,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:04,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:04,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:04,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138809495] [2021-08-21 17:50:04,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138809495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:04,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715701181] [2021-08-21 17:50:04,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:50:04,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:04,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:04,882 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 17:50:04,890 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 17:50:06,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:50:06,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:06,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 17:50:06,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:06,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-08-21 17:50:06,740 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 44 treesize of output 36 [2021-08-21 17:50:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:06,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715701181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:06,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:06,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 28 [2021-08-21 17:50:06,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443735172] [2021-08-21 17:50:06,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 17:50:06,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:06,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 17:50:06,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:50:06,804 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:07,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:07,074 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-08-21 17:50:07,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:50:07,074 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 17:50:07,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:07,075 INFO L225 Difference]: With dead ends: 31 [2021-08-21 17:50:07,075 INFO L226 Difference]: Without dead ends: 31 [2021-08-21 17:50:07,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 538.4ms TimeCoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:50:07,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-21 17:50:07,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-08-21 17:50:07,076 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 17:50:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-08-21 17:50:07,076 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 29 [2021-08-21 17:50:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:07,077 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-08-21 17:50:07,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-08-21 17:50:07,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 17:50:07,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:07,077 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:07,107 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 17:50:07,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:07,293 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:07,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:07,294 INFO L82 PathProgramCache]: Analyzing trace with hash 47453722, now seen corresponding path program 19 times [2021-08-21 17:50:07,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:07,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245350618] [2021-08-21 17:50:07,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:07,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:08,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:08,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245350618] [2021-08-21 17:50:08,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245350618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:08,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490732077] [2021-08-21 17:50:08,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:50:08,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:08,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:08,573 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 17:50:08,574 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 17:50:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:09,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-21 17:50:09,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:13,740 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:50:13,741 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 299 treesize of output 258 [2021-08-21 17:50:13,750 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:50:13,750 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 255 treesize of output 222 [2021-08-21 17:50:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:14,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490732077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:14,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:14,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 36 [2021-08-21 17:50:14,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608631688] [2021-08-21 17:50:14,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 17:50:14,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:14,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 17:50:14,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:50:14,101 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:14,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:14,889 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-08-21 17:50:14,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:50:14,890 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 17:50:14,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:14,890 INFO L225 Difference]: With dead ends: 49 [2021-08-21 17:50:14,890 INFO L226 Difference]: Without dead ends: 33 [2021-08-21 17:50:14,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1625.6ms TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 17:50:14,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-21 17:50:14,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-08-21 17:50:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 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 17:50:14,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-08-21 17:50:14,892 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2021-08-21 17:50:14,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:14,892 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-08-21 17:50:14,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:14,893 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-08-21 17:50:14,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:50:14,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:14,893 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:14,918 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 17:50:15,108 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,SelfDestructingSolverStorable28 [2021-08-21 17:50:15,109 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:15,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:15,109 INFO L82 PathProgramCache]: Analyzing trace with hash -217022992, now seen corresponding path program 20 times [2021-08-21 17:50:15,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:15,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457681291] [2021-08-21 17:50:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:15,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 1 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:15,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:15,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457681291] [2021-08-21 17:50:15,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457681291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:15,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845393852] [2021-08-21 17:50:15,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:50:15,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:15,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:15,713 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 17:50:15,743 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 17:50:17,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:50:17,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:17,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 17:50:17,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:17,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-08-21 17:50:17,806 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 44 treesize of output 36 [2021-08-21 17:50:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 1 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:17,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845393852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:17,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:17,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 31 [2021-08-21 17:50:17,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949551477] [2021-08-21 17:50:17,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:50:17,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:17,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:50:17,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:50:17,838 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 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 17:50:18,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:18,193 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-08-21 17:50:18,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:50:18,194 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 17:50:18,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:18,194 INFO L225 Difference]: With dead ends: 33 [2021-08-21 17:50:18,194 INFO L226 Difference]: Without dead ends: 33 [2021-08-21 17:50:18,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 666.4ms TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:50:18,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-21 17:50:18,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-21 17:50:18,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:18,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-08-21 17:50:18,196 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2021-08-21 17:50:18,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:18,196 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-08-21 17:50:18,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 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 17:50:18,196 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-08-21 17:50:18,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:50:18,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:18,196 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:18,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 17:50:18,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:18,397 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:18,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1664366380, now seen corresponding path program 21 times [2021-08-21 17:50:18,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:18,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226506882] [2021-08-21 17:50:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:18,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:19,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:19,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226506882] [2021-08-21 17:50:19,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226506882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:19,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674419765] [2021-08-21 17:50:19,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:50:19,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:19,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:19,765 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 17:50:19,765 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 17:50:21,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:50:21,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:21,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-21 17:50:21,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:23,625 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 263 treesize of output 223 [2021-08-21 17:50:23,628 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 223 treesize of output 191 [2021-08-21 17:50:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:24,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674419765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:24,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:24,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 49 [2021-08-21 17:50:24,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121123183] [2021-08-21 17:50:24,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-21 17:50:24,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:24,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-21 17:50:24,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 17:50:24,042 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 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 17:50:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:25,966 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2021-08-21 17:50:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:50:25,967 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 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 32 [2021-08-21 17:50:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:25,967 INFO L225 Difference]: With dead ends: 51 [2021-08-21 17:50:25,967 INFO L226 Difference]: Without dead ends: 34 [2021-08-21 17:50:25,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 3431.2ms TimeCoverageRelationStatistics Valid=252, Invalid=3530, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 17:50:25,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-21 17:50:25,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-08-21 17:50:25,969 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 17:50:25,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-08-21 17:50:25,969 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2021-08-21 17:50:25,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:25,969 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-08-21 17:50:25,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 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 17:50:25,969 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-08-21 17:50:25,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:50:25,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:25,970 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:25,991 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 17:50:26,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:26,173 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:26,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:26,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1871549226, now seen corresponding path program 22 times [2021-08-21 17:50:26,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:26,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093855182] [2021-08-21 17:50:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:26,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 1 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:26,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:26,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093855182] [2021-08-21 17:50:26,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093855182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:26,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479128587] [2021-08-21 17:50:26,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:50:26,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:26,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:26,732 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 17:50:26,733 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 17:50:28,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:50:28,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:28,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 17:50:28,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:29,073 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 52 treesize of output 44 [2021-08-21 17:50:29,080 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 44 treesize of output 36 [2021-08-21 17:50:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 1 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:29,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479128587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:29,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:29,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 34 [2021-08-21 17:50:29,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813574974] [2021-08-21 17:50:29,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 17:50:29,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:29,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 17:50:29,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:50:29,104 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 34 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 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 17:50:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:29,427 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-08-21 17:50:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:50:29,428 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 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 33 [2021-08-21 17:50:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:29,428 INFO L225 Difference]: With dead ends: 35 [2021-08-21 17:50:29,428 INFO L226 Difference]: Without dead ends: 35 [2021-08-21 17:50:29,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 725.4ms TimeCoverageRelationStatistics Valid=107, Invalid=1153, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:50:29,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-21 17:50:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-08-21 17:50:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 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 17:50:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-08-21 17:50:29,430 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 33 [2021-08-21 17:50:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:29,430 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-08-21 17:50:29,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 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 17:50:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-08-21 17:50:29,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 17:50:29,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:29,430 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:29,453 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 17:50:29,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:29,637 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:29,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1343137062, now seen corresponding path program 23 times [2021-08-21 17:50:29,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:29,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439655624] [2021-08-21 17:50:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:29,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:31,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:31,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439655624] [2021-08-21 17:50:31,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439655624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:31,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552198585] [2021-08-21 17:50:31,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:50:31,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:31,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:31,317 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 17:50:31,318 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 17:50:33,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:50:33,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:33,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-21 17:50:33,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:38,554 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:50:38,555 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 286 treesize of output 245 [2021-08-21 17:50:38,562 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:50:38,562 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 242 treesize of output 213 [2021-08-21 17:50:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:38,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552198585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:38,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:38,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 42 [2021-08-21 17:50:38,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236899909] [2021-08-21 17:50:38,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 17:50:38,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:38,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 17:50:38,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 17:50:38,878 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 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 17:50:40,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:40,043 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-08-21 17:50:40,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:50:40,043 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 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 34 [2021-08-21 17:50:40,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:40,044 INFO L225 Difference]: With dead ends: 61 [2021-08-21 17:50:40,044 INFO L226 Difference]: Without dead ends: 57 [2021-08-21 17:50:40,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2425.4ms TimeCoverageRelationStatistics Valid=239, Invalid=2841, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 17:50:40,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-21 17:50:40,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 39. [2021-08-21 17:50:40,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:40,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-08-21 17:50:40,046 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2021-08-21 17:50:40,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:40,046 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-08-21 17:50:40,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 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 17:50:40,047 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-08-21 17:50:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 17:50:40,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:40,047 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:40,088 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 17:50:40,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:40,273 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:40,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:40,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2080803114, now seen corresponding path program 24 times [2021-08-21 17:50:40,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:40,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743160912] [2021-08-21 17:50:40,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:40,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:40,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:40,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743160912] [2021-08-21 17:50:40,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743160912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:40,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507220610] [2021-08-21 17:50:40,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:50:40,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:40,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:40,939 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 17:50:40,941 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 17:50:42,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 17:50:42,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:42,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 17:50:42,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:43,797 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 53 treesize of output 45 [2021-08-21 17:50:43,798 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 45 treesize of output 37 [2021-08-21 17:50:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:43,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507220610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:43,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:43,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 38 [2021-08-21 17:50:43,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334495927] [2021-08-21 17:50:43,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 17:50:43,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:43,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 17:50:43,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:50:43,832 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:44,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:44,710 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-08-21 17:50:44,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:50:44,711 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 17:50:44,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:44,711 INFO L225 Difference]: With dead ends: 50 [2021-08-21 17:50:44,711 INFO L226 Difference]: Without dead ends: 36 [2021-08-21 17:50:44,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1422.4ms TimeCoverageRelationStatistics Valid=210, Invalid=2442, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 17:50:44,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-21 17:50:44,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-21 17:50:44,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-08-21 17:50:44,713 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 35 [2021-08-21 17:50:44,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:44,713 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-08-21 17:50:44,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:44,713 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-08-21 17:50:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 17:50:44,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:44,714 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:44,736 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 17:50:44,916 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,SelfDestructingSolverStorable33 [2021-08-21 17:50:44,917 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:44,917 INFO L82 PathProgramCache]: Analyzing trace with hash -647370832, now seen corresponding path program 25 times [2021-08-21 17:50:44,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:44,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856821684] [2021-08-21 17:50:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:44,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 1 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:45,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:45,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856821684] [2021-08-21 17:50:45,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856821684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:45,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658918297] [2021-08-21 17:50:45,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:50:45,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:45,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:45,642 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 17:50:45,642 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 17:50:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:47,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 17:50:47,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:48,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-08-21 17:50:48,280 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 44 treesize of output 36 [2021-08-21 17:50:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 1 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:48,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658918297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:48,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:48,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 37 [2021-08-21 17:50:48,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180374845] [2021-08-21 17:50:48,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 17:50:48,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:48,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 17:50:48,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:50:48,320 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 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 17:50:48,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:48,666 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-08-21 17:50:48,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:50:48,667 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 17:50:48,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:48,667 INFO L225 Difference]: With dead ends: 37 [2021-08-21 17:50:48,667 INFO L226 Difference]: Without dead ends: 37 [2021-08-21 17:50:48,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 914.3ms TimeCoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 17:50:48,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-21 17:50:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-08-21 17:50:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:48,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-08-21 17:50:48,669 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2021-08-21 17:50:48,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:48,669 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-08-21 17:50:48,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 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 17:50:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-08-21 17:50:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:50:48,669 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:48,669 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:48,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 17:50:48,873 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,SelfDestructingSolverStorable34 [2021-08-21 17:50:48,874 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:48,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:48,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2120247532, now seen corresponding path program 26 times [2021-08-21 17:50:48,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:48,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623605033] [2021-08-21 17:50:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:48,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:50,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:50,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623605033] [2021-08-21 17:50:50,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623605033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:50,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367092336] [2021-08-21 17:50:50,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:50:50,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:50,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:50,713 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 17:50:50,714 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 17:50:52,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:50:52,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:52,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 17:50:52,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:57,555 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:50:57,556 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 363 treesize of output 326 [2021-08-21 17:50:57,564 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:50:57,565 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 323 treesize of output 270 [2021-08-21 17:50:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:57,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367092336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:57,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:57,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 45 [2021-08-21 17:50:57,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638733849] [2021-08-21 17:50:57,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-21 17:50:57,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:57,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-21 17:50:57,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 17:50:57,990 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 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 17:50:59,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:59,241 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-08-21 17:50:59,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 17:50:59,241 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 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) Word has length 36 [2021-08-21 17:50:59,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:59,241 INFO L225 Difference]: With dead ends: 58 [2021-08-21 17:50:59,241 INFO L226 Difference]: Without dead ends: 39 [2021-08-21 17:50:59,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2545.3ms TimeCoverageRelationStatistics Valid=255, Invalid=3167, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 17:50:59,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-21 17:50:59,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-08-21 17:50:59,243 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 17:50:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-08-21 17:50:59,243 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2021-08-21 17:50:59,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:59,243 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-08-21 17:50:59,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 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 17:50:59,244 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-08-21 17:50:59,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 17:50:59,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:59,244 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:59,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 17:50:59,444 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,SelfDestructingSolverStorable35 [2021-08-21 17:50:59,445 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:59,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:59,445 INFO L82 PathProgramCache]: Analyzing trace with hash 791168618, now seen corresponding path program 27 times [2021-08-21 17:50:59,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:59,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744941746] [2021-08-21 17:50:59,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:59,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 1 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:00,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:00,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744941746] [2021-08-21 17:51:00,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744941746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:00,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635603063] [2021-08-21 17:51:00,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:51:00,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:00,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:00,183 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 17:51:00,184 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 17:51:02,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 17:51:02,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:51:02,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 17:51:02,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:03,625 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 52 treesize of output 44 [2021-08-21 17:51:03,627 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 44 treesize of output 36 [2021-08-21 17:51:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:03,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635603063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:03,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:03,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2021-08-21 17:51:03,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157441838] [2021-08-21 17:51:03,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-21 17:51:03,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:03,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-21 17:51:03,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2461, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 17:51:03,653 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 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 17:51:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:04,485 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-08-21 17:51:04,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 17:51:04,485 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 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 37 [2021-08-21 17:51:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:04,486 INFO L225 Difference]: With dead ends: 39 [2021-08-21 17:51:04,486 INFO L226 Difference]: Without dead ends: 39 [2021-08-21 17:51:04,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1738.4ms TimeCoverageRelationStatistics Valid=602, Invalid=3954, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 17:51:04,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-21 17:51:04,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-08-21 17:51:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 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 17:51:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-08-21 17:51:04,488 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 37 [2021-08-21 17:51:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:04,488 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-08-21 17:51:04,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 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 17:51:04,489 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-08-21 17:51:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:51:04,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:04,489 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:04,513 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 17:51:04,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:04,690 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:51:04,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:04,690 INFO L82 PathProgramCache]: Analyzing trace with hash -475197542, now seen corresponding path program 28 times [2021-08-21 17:51:04,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:04,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457467979] [2021-08-21 17:51:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:04,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:07,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:07,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457467979] [2021-08-21 17:51:07,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457467979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:07,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108648865] [2021-08-21 17:51:07,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:51:07,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:07,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:07,735 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 17:51:07,736 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 17:51:09,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:51:09,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:51:09,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 67 conjunts are in the unsatisfiable core [2021-08-21 17:51:09,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:14,052 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 387 treesize of output 337 [2021-08-21 17:51:14,055 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 337 treesize of output 293 [2021-08-21 17:51:14,296 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 72 treesize of output 64 [2021-08-21 17:51:14,300 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 65 treesize of output 53 [2021-08-21 17:51:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:14,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108648865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:14,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:14,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 44 [2021-08-21 17:51:14,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216764940] [2021-08-21 17:51:14,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 17:51:14,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:14,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 17:51:14,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1782, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 17:51:14,453 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:19,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:19,628 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2021-08-21 17:51:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:51:19,632 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:51:19,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:19,633 INFO L225 Difference]: With dead ends: 67 [2021-08-21 17:51:19,633 INFO L226 Difference]: Without dead ends: 63 [2021-08-21 17:51:19,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 7649.1ms TimeCoverageRelationStatistics Valid=218, Invalid=3322, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 17:51:19,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-21 17:51:19,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 43. [2021-08-21 17:51:19,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:19,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-08-21 17:51:19,635 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2021-08-21 17:51:19,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:19,635 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-08-21 17:51:19,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:19,636 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-08-21 17:51:19,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 17:51:19,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:19,636 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:19,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 17:51:19,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 17:51:19,841 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:51:19,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:19,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1077842838, now seen corresponding path program 29 times [2021-08-21 17:51:19,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:19,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764755834] [2021-08-21 17:51:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:19,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 92 proven. 13 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-21 17:51:20,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:20,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764755834] [2021-08-21 17:51:20,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764755834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:20,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229616207] [2021-08-21 17:51:20,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:51:20,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:20,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:20,005 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 17:51:20,027 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 17:51:22,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 17:51:22,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:51:22,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:51:22,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-21 17:51:22,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229616207] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:51:22,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 17:51:22,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [16] total 17 [2021-08-21 17:51:22,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424194422] [2021-08-21 17:51:22,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:51:22,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:22,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:51:22,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:51:22,708 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 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 17:51:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:22,727 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-08-21 17:51:22,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:51:22,727 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 17:51:22,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:22,729 INFO L225 Difference]: With dead ends: 56 [2021-08-21 17:51:22,730 INFO L226 Difference]: Without dead ends: 40 [2021-08-21 17:51:22,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:51:22,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-21 17:51:22,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-08-21 17:51:22,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 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 17:51:22,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-08-21 17:51:22,731 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 39 [2021-08-21 17:51:22,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:22,732 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-08-21 17:51:22,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 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 17:51:22,732 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-08-21 17:51:22,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 17:51:22,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:22,732 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:22,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 17:51:22,949 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,SelfDestructingSolverStorable38 [2021-08-21 17:51:22,949 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:51:22,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:22,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1372012912, now seen corresponding path program 30 times [2021-08-21 17:51:22,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:22,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371877372] [2021-08-21 17:51:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:22,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-21 17:51:23,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:23,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371877372] [2021-08-21 17:51:23,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371877372] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:51:23,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:51:23,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-08-21 17:51:23,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653091723] [2021-08-21 17:51:23,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:51:23,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:23,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:51:23,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:51:23,106 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 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 17:51:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:23,128 INFO L93 Difference]: Finished difference Result 17 states and 16 transitions. [2021-08-21 17:51:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:51:23,129 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 17:51:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:23,129 INFO L225 Difference]: With dead ends: 17 [2021-08-21 17:51:23,129 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 17:51:23,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:51:23,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 17:51:23,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 17:51:23,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 17:51:23,129 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2021-08-21 17:51:23,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:23,129 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 17:51:23,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 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 17:51:23,130 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 17:51:23,130 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 17:51:23,132 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 17:51:23,132 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 17:51:23,132 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 17:51:23,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-08-21 17:51:23,135 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 17:51:23,135 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 17:51:23,137 INFO L202 PluginConnector]: Adding new model poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:51:23 BasicIcfg [2021-08-21 17:51:23,137 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 17:51:23,138 INFO L168 Benchmark]: Toolchain (without parser) took 140485.36 ms. Allocated memory was 201.3 MB in the beginning and 950.0 MB in the end (delta: 748.7 MB). Free memory was 181.2 MB in the beginning and 584.2 MB in the end (delta: -403.1 MB). Peak memory consumption was 345.5 MB. Max. memory is 8.0 GB. [2021-08-21 17:51:23,138 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 201.3 MB. Free memory was 183.3 MB in the beginning and 183.1 MB in the end (delta: 132.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 17:51:23,138 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.66 ms. Allocated memory is still 201.3 MB. Free memory was 181.2 MB in the beginning and 179.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 17:51:23,138 INFO L168 Benchmark]: Boogie Preprocessor took 38.01 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 177.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 17:51:23,139 INFO L168 Benchmark]: RCFGBuilder took 682.59 ms. Allocated memory is still 201.3 MB. Free memory was 177.8 MB in the beginning and 162.7 MB in the end (delta: 15.1 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. [2021-08-21 17:51:23,139 INFO L168 Benchmark]: TraceAbstraction took 139713.94 ms. Allocated memory was 201.3 MB in the beginning and 950.0 MB in the end (delta: 748.7 MB). Free memory was 162.7 MB in the beginning and 584.2 MB in the end (delta: -421.6 MB). Peak memory consumption was 327.1 MB. Max. memory is 8.0 GB. [2021-08-21 17:51:23,140 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 201.3 MB. Free memory was 183.3 MB in the beginning and 183.1 MB in the end (delta: 132.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 45.66 ms. Allocated memory is still 201.3 MB. Free memory was 181.2 MB in the beginning and 179.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.01 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 177.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 682.59 ms. Allocated memory is still 201.3 MB. Free memory was 177.8 MB in the beginning and 162.7 MB in the end (delta: 15.1 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 139713.94 ms. Allocated memory was 201.3 MB in the beginning and 950.0 MB in the end (delta: 748.7 MB). Free memory was 162.7 MB in the beginning and 584.2 MB in the end (delta: -421.6 MB). Peak memory consumption was 327.1 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: 115, positive: 80, positive conditional: 80, positive unconditional: 0, negative: 35, negative conditional: 35, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 80, positive: 80, positive conditional: 0, positive unconditional: 80, 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: 80, positive: 80, positive conditional: 0, positive unconditional: 80, 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: 80, positive: 80, positive conditional: 0, positive unconditional: 80, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 80, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 80, unknown conditional: 0, unknown unconditional: 80] , Statistics on independence cache: Total cache size (in pairs): 80, Positive cache size: 80, Positive conditional cache size: 0, Positive unconditional cache size: 80, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 35 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 204]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 139622.4ms, OverallIterations: 40, TraceHistogramMax: 14, EmptinessCheckTime: 21.7ms, AutomataDifference: 23463.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 55.3ms, PartialOrderReductionTime: 42.6ms, HoareTripleCheckerStatistics: 525 SDtfs, 602 SDslu, 5161 SDs, 0 SdLazy, 11687 SolverSat, 665 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5662.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1556 GetRequests, 529 SyntacticMatches, 62 SemanticMatches, 965 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4525 ImplicationChecksByTransitivity, 40024.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=38, InterpolantAutomatonStates: 605, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 76.0ms AutomataMinimizationTime, 40 MinimizatonAttempts, 101 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 245.8ms SsaConstructionTime, 1597.7ms SatisfiabilityAnalysisTime, 75663.2ms InterpolantComputationTime, 1709 NumberOfCodeBlocks, 1709 NumberOfCodeBlocksAsserted, 138 NumberOfCheckSat, 1639 ConstructedInterpolants, 67 QuantifiedInterpolants, 50769 SizeOfPredicates, 153 NumberOfNonLiveVariables, 4054 ConjunctsInSsa, 1093 ConjunctsInUnsatCore, 70 InterpolantComputations, 11 PerfectInterpolantSequences, 728/4488 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-21 17:51:23,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...