/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/incr-decr09.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 13:39:25,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 13:39:25,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 13:39:25,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 13:39:25,940 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 13:39:25,955 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 13:39:25,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 13:39:25,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 13:39:25,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 13:39:25,957 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 13:39:25,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 13:39:25,957 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 13:39:25,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 13:39:25,957 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 13:39:25,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 13:39:25,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 13:39:25,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 13:39:25,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 13:39:25,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 13:39:25,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 13:39:25,958 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 13:39:25,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 13:39:25,958 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 13:39:25,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 13:39:25,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 13:39:25,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 13:39:25,959 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 13:39:25,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 13:39:25,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:39:25,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 13:39:25,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 13:39:25,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 13:39:25,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 13:39:25,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 13:39:25,960 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 13:39:25,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 13:39:25,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 13:39:26,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 13:39:26,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 13:39:26,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 13:39:26,245 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 13:39:26,247 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 13:39:26,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/incr-decr09.bpl [2021-08-21 13:39:26,248 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/incr-decr09.bpl' [2021-08-21 13:39:26,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 13:39:26,270 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 13:39:26,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 13:39:26,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 13:39:26,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 13:39:26,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:26" (1/1) ... [2021-08-21 13:39:26,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:26" (1/1) ... [2021-08-21 13:39:26,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 13:39:26,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 13:39:26,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 13:39:26,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 13:39:26,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:26" (1/1) ... [2021-08-21 13:39:26,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:26" (1/1) ... [2021-08-21 13:39:26,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:26" (1/1) ... [2021-08-21 13:39:26,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:26" (1/1) ... [2021-08-21 13:39:26,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:26" (1/1) ... [2021-08-21 13:39:26,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:26" (1/1) ... [2021-08-21 13:39:26,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:26" (1/1) ... [2021-08-21 13:39:26,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 13:39:26,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 13:39:26,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 13:39:26,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 13:39:26,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:26" (1/1) ... [2021-08-21 13:39:26,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:39:26,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:39:26,355 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 13:39:26,374 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 13:39:26,393 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 13:39:26,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 13:39:26,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 13:39:26,394 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-08-21 13:39:26,394 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-08-21 13:39:26,394 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-08-21 13:39:26,395 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 13:39:26,528 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 13:39:26,528 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-21 13:39:26,530 INFO L202 PluginConnector]: Adding new model incr-decr09.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:39:26 BoogieIcfgContainer [2021-08-21 13:39:26,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 13:39:26,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 13:39:26,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 13:39:26,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 13:39:26,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:26" (1/2) ... [2021-08-21 13:39:26,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6634b872 and model type incr-decr09.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:39:26, skipping insertion in model container [2021-08-21 13:39:26,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:39:26" (2/2) ... [2021-08-21 13:39:26,541 INFO L111 eAbstractionObserver]: Analyzing ICFG incr-decr09.bpl [2021-08-21 13:39:26,551 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 13:39:26,551 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 13:39:26,551 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 13:39:26,551 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 13:39:26,644 INFO L148 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2021-08-21 13:39:26,678 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 13:39:26,694 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 13:39:26,695 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-08-21 13:39:26,717 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 77 places, 58 transitions, 188 flow [2021-08-21 13:39:28,903 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 39367 states, 39366 states have (on average 8.750063506579282) internal successors, (344455), 39366 states have internal predecessors, (344455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:29,028 INFO L276 IsEmpty]: Start isEmpty. Operand has 39367 states, 39366 states have (on average 8.750063506579282) internal successors, (344455), 39366 states have internal predecessors, (344455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:29,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:39:29,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:29,617 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:39:29,617 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:39:29,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:29,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1875566703, now seen corresponding path program 1 times [2021-08-21 13:39:29,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:29,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984574709] [2021-08-21 13:39:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:29,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:29,833 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 13:39:29,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:29,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984574709] [2021-08-21 13:39:29,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984574709] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:39:29,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:39:29,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-21 13:39:29,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642514400] [2021-08-21 13:39:29,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:39:29,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:29,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:39:29,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:39:29,968 INFO L87 Difference]: Start difference. First operand has 39367 states, 39366 states have (on average 8.750063506579282) internal successors, (344455), 39366 states have internal predecessors, (344455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 2 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 13:39:31,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:31,328 INFO L93 Difference]: Finished difference Result 40900 states and 357256 transitions. [2021-08-21 13:39:31,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:39:31,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 13:39:31,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:32,076 INFO L225 Difference]: With dead ends: 40900 [2021-08-21 13:39:32,077 INFO L226 Difference]: Without dead ends: 40890 [2021-08-21 13:39:32,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:39:32,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40890 states. [2021-08-21 13:39:34,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40890 to 40890. [2021-08-21 13:39:34,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40890 states, 40889 states have (on average 8.73589473941647) internal successors, (357202), 40889 states have internal predecessors, (357202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40890 states to 40890 states and 357202 transitions. [2021-08-21 13:39:35,589 INFO L78 Accepts]: Start accepts. Automaton has 40890 states and 357202 transitions. Word has length 29 [2021-08-21 13:39:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:35,590 INFO L470 AbstractCegarLoop]: Abstraction has 40890 states and 357202 transitions. [2021-08-21 13:39:35,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 2 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 13:39:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 40890 states and 357202 transitions. [2021-08-21 13:39:35,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 13:39:35,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:35,871 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:39:35,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 13:39:35,872 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:39:35,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:35,873 INFO L82 PathProgramCache]: Analyzing trace with hash -332018351, now seen corresponding path program 1 times [2021-08-21 13:39:35,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:35,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599353019] [2021-08-21 13:39:35,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:35,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:35,945 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 13:39:35,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:35,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599353019] [2021-08-21 13:39:35,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599353019] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:39:35,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:39:35,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 13:39:35,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76983885] [2021-08-21 13:39:35,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:39:35,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:35,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:39:35,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:39:35,948 INFO L87 Difference]: Start difference. First operand 40890 states and 357202 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 13:39:37,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:37,239 INFO L93 Difference]: Finished difference Result 48310 states and 420425 transitions. [2021-08-21 13:39:37,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:39:37,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 31 [2021-08-21 13:39:37,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:37,865 INFO L225 Difference]: With dead ends: 48310 [2021-08-21 13:39:37,866 INFO L226 Difference]: Without dead ends: 48163 [2021-08-21 13:39:37,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:39:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48163 states. [2021-08-21 13:39:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48163 to 46686. [2021-08-21 13:39:40,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46686 states, 46685 states have (on average 8.71742529720467) internal successors, (406973), 46685 states have internal predecessors, (406973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:41,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46686 states to 46686 states and 406973 transitions. [2021-08-21 13:39:41,374 INFO L78 Accepts]: Start accepts. Automaton has 46686 states and 406973 transitions. Word has length 31 [2021-08-21 13:39:41,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:41,375 INFO L470 AbstractCegarLoop]: Abstraction has 46686 states and 406973 transitions. [2021-08-21 13:39:41,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 13:39:41,375 INFO L276 IsEmpty]: Start isEmpty. Operand 46686 states and 406973 transitions. [2021-08-21 13:39:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:39:42,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:42,028 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:39:42,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 13:39:42,028 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:39:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:42,029 INFO L82 PathProgramCache]: Analyzing trace with hash 463781189, now seen corresponding path program 1 times [2021-08-21 13:39:42,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:42,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250020996] [2021-08-21 13:39:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:42,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:42,339 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 13:39:42,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:42,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250020996] [2021-08-21 13:39:42,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250020996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:42,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371554957] [2021-08-21 13:39:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:42,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:39:42,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:39:42,345 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 13:39:42,350 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 13:39:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:42,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 13:39:42,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:39:42,863 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 13:39:42,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371554957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:42,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:39:42,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 13:39:42,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317934431] [2021-08-21 13:39:42,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:39:42,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:42,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:39:42,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:39:42,876 INFO L87 Difference]: Start difference. First operand 46686 states and 406973 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 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 13:39:44,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:44,656 INFO L93 Difference]: Finished difference Result 64335 states and 559263 transitions. [2021-08-21 13:39:44,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:39:44,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 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 33 [2021-08-21 13:39:44,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:45,477 INFO L225 Difference]: With dead ends: 64335 [2021-08-21 13:39:45,478 INFO L226 Difference]: Without dead ends: 63360 [2021-08-21 13:39:45,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:39:45,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63360 states. [2021-08-21 13:39:49,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63360 to 56418. [2021-08-21 13:39:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56418 states, 56417 states have (on average 8.72205186379992) internal successors, (492072), 56417 states have internal predecessors, (492072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:50,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56418 states to 56418 states and 492072 transitions. [2021-08-21 13:39:50,128 INFO L78 Accepts]: Start accepts. Automaton has 56418 states and 492072 transitions. Word has length 33 [2021-08-21 13:39:50,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:50,129 INFO L470 AbstractCegarLoop]: Abstraction has 56418 states and 492072 transitions. [2021-08-21 13:39:50,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 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 13:39:50,129 INFO L276 IsEmpty]: Start isEmpty. Operand 56418 states and 492072 transitions. [2021-08-21 13:39:50,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 13:39:50,439 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:50,440 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:39:50,459 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 13:39:50,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:39:50,662 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:39:50,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:50,663 INFO L82 PathProgramCache]: Analyzing trace with hash 9211011, now seen corresponding path program 1 times [2021-08-21 13:39:50,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:50,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248759265] [2021-08-21 13:39:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:50,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:39:50,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:50,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248759265] [2021-08-21 13:39:50,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248759265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:50,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468706551] [2021-08-21 13:39:50,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:50,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:39:50,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:39:50,738 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 13:39:50,739 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 13:39:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:50,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:39:50,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:39:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:39:51,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468706551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:39:51,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:39:51,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 13:39:51,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382177673] [2021-08-21 13:39:51,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 13:39:51,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:51,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 13:39:51,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:39:51,039 INFO L87 Difference]: Start difference. First operand 56418 states and 492072 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 13:39:53,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:53,344 INFO L93 Difference]: Finished difference Result 84538 states and 736662 transitions. [2021-08-21 13:39:53,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 13:39:53,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 35 [2021-08-21 13:39:53,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:54,237 INFO L225 Difference]: With dead ends: 84538 [2021-08-21 13:39:54,238 INFO L226 Difference]: Without dead ends: 80536 [2021-08-21 13:39:54,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:39:54,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80536 states. [2021-08-21 13:39:58,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80536 to 65082. [2021-08-21 13:39:58,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65082 states, 65081 states have (on average 8.744994698913661) internal successors, (569133), 65081 states have internal predecessors, (569133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:39:59,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65082 states to 65082 states and 569133 transitions. [2021-08-21 13:39:59,339 INFO L78 Accepts]: Start accepts. Automaton has 65082 states and 569133 transitions. Word has length 35 [2021-08-21 13:39:59,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:39:59,339 INFO L470 AbstractCegarLoop]: Abstraction has 65082 states and 569133 transitions. [2021-08-21 13:39:59,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 13:39:59,340 INFO L276 IsEmpty]: Start isEmpty. Operand 65082 states and 569133 transitions. [2021-08-21 13:40:00,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 13:40:00,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:40:00,035 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:40:00,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 13:40:00,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-21 13:40:00,245 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:40:00,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:40:00,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1060447455, now seen corresponding path program 1 times [2021-08-21 13:40:00,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:40:00,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556670890] [2021-08-21 13:40:00,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:00,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:40:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:40:00,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:40:00,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556670890] [2021-08-21 13:40:00,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556670890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:00,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446367220] [2021-08-21 13:40:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:00,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:40:00,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:40:00,343 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 13:40:00,378 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 13:40:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:00,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:40:00,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:40:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:40:00,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446367220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:00,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:40:00,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 13:40:00,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514638091] [2021-08-21 13:40:00,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:40:00,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:40:00,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:40:00,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:40:00,709 INFO L87 Difference]: Start difference. First operand 65082 states and 569133 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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 13:40:03,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:40:03,579 INFO L93 Difference]: Finished difference Result 100095 states and 875216 transitions. [2021-08-21 13:40:03,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 13:40:03,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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 37 [2021-08-21 13:40:03,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:40:05,010 INFO L225 Difference]: With dead ends: 100095 [2021-08-21 13:40:05,010 INFO L226 Difference]: Without dead ends: 88788 [2021-08-21 13:40:05,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:40:05,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88788 states. [2021-08-21 13:40:09,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88788 to 67398. [2021-08-21 13:40:09,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67398 states, 67397 states have (on average 8.767274507767407) internal successors, (590888), 67397 states have internal predecessors, (590888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:10,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67398 states to 67398 states and 590888 transitions. [2021-08-21 13:40:10,699 INFO L78 Accepts]: Start accepts. Automaton has 67398 states and 590888 transitions. Word has length 37 [2021-08-21 13:40:10,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:40:10,699 INFO L470 AbstractCegarLoop]: Abstraction has 67398 states and 590888 transitions. [2021-08-21 13:40:10,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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 13:40:10,699 INFO L276 IsEmpty]: Start isEmpty. Operand 67398 states and 590888 transitions. [2021-08-21 13:40:11,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 13:40:11,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:40:11,074 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:40:11,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 13:40:11,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:40:11,276 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:40:11,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:40:11,276 INFO L82 PathProgramCache]: Analyzing trace with hash -295390453, now seen corresponding path program 1 times [2021-08-21 13:40:11,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:40:11,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865194270] [2021-08-21 13:40:11,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:11,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:40:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:40:11,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:40:11,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865194270] [2021-08-21 13:40:11,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865194270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:11,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271456400] [2021-08-21 13:40:11,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:11,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:40:11,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:40:11,433 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 13:40:11,434 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 13:40:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:11,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 13:40:11,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:40:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:40:12,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271456400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:12,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:40:12,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 13:40:12,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817640663] [2021-08-21 13:40:12,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:40:12,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:40:12,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:40:12,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:40:12,211 INFO L87 Difference]: Start difference. First operand 67398 states and 590888 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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 13:40:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:40:15,277 INFO L93 Difference]: Finished difference Result 105274 states and 923245 transitions. [2021-08-21 13:40:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:40:15,289 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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 39 [2021-08-21 13:40:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:40:16,531 INFO L225 Difference]: With dead ends: 105274 [2021-08-21 13:40:16,531 INFO L226 Difference]: Without dead ends: 82121 [2021-08-21 13:40:16,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:40:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82121 states. [2021-08-21 13:40:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82121 to 62070. [2021-08-21 13:40:20,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62070 states, 62069 states have (on average 8.7810178994345) internal successors, (545029), 62069 states have internal predecessors, (545029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62070 states to 62070 states and 545029 transitions. [2021-08-21 13:40:22,073 INFO L78 Accepts]: Start accepts. Automaton has 62070 states and 545029 transitions. Word has length 39 [2021-08-21 13:40:22,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:40:22,073 INFO L470 AbstractCegarLoop]: Abstraction has 62070 states and 545029 transitions. [2021-08-21 13:40:22,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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 13:40:22,074 INFO L276 IsEmpty]: Start isEmpty. Operand 62070 states and 545029 transitions. [2021-08-21 13:40:22,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 13:40:22,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:40:22,417 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:40:22,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 13:40:22,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:40:22,618 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:40:22,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:40:22,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1184494221, now seen corresponding path program 1 times [2021-08-21 13:40:22,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:40:22,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123527545] [2021-08-21 13:40:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:22,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:40:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:23,072 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 13:40:23,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:40:23,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123527545] [2021-08-21 13:40:23,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123527545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:23,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037259299] [2021-08-21 13:40:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:23,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:40:23,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:40:23,074 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 13:40:23,077 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 13:40:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:23,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:40:23,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:40:23,442 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 13:40:23,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037259299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:23,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:40:23,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 13:40:23,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089791390] [2021-08-21 13:40:23,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:40:23,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:40:23,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:40:23,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:40:23,445 INFO L87 Difference]: Start difference. First operand 62070 states and 545029 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 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 13:40:26,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:40:26,037 INFO L93 Difference]: Finished difference Result 100143 states and 880585 transitions. [2021-08-21 13:40:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 13:40:26,037 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 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) Word has length 41 [2021-08-21 13:40:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:40:26,739 INFO L225 Difference]: With dead ends: 100143 [2021-08-21 13:40:26,740 INFO L226 Difference]: Without dead ends: 64669 [2021-08-21 13:40:26,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:40:26,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64669 states. [2021-08-21 13:40:29,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64669 to 52026. [2021-08-21 13:40:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52026 states, 52025 states have (on average 8.7971552138395) internal successors, (457672), 52025 states have internal predecessors, (457672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52026 states to 52026 states and 457672 transitions. [2021-08-21 13:40:30,511 INFO L78 Accepts]: Start accepts. Automaton has 52026 states and 457672 transitions. Word has length 41 [2021-08-21 13:40:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:40:30,512 INFO L470 AbstractCegarLoop]: Abstraction has 52026 states and 457672 transitions. [2021-08-21 13:40:30,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 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 13:40:30,512 INFO L276 IsEmpty]: Start isEmpty. Operand 52026 states and 457672 transitions. [2021-08-21 13:40:31,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 13:40:31,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:40:31,109 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:40:31,127 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 13:40:31,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:40:31,310 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:40:31,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:40:31,310 INFO L82 PathProgramCache]: Analyzing trace with hash -741428789, now seen corresponding path program 1 times [2021-08-21 13:40:31,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:40:31,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476082413] [2021-08-21 13:40:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:31,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:40:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:40:31,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:40:31,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476082413] [2021-08-21 13:40:31,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476082413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:31,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821516637] [2021-08-21 13:40:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:31,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:40:31,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:40:31,439 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 13:40:31,439 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 13:40:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:31,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 13:40:31,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:40:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:40:31,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821516637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:31,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:40:31,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 13:40:31,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987636233] [2021-08-21 13:40:31,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:40:31,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:40:31,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:40:31,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:40:31,859 INFO L87 Difference]: Start difference. First operand 52026 states and 457672 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 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 13:40:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:40:34,464 INFO L93 Difference]: Finished difference Result 88090 states and 777332 transitions. [2021-08-21 13:40:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:40:34,465 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 13:40:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:40:34,959 INFO L225 Difference]: With dead ends: 88090 [2021-08-21 13:40:34,959 INFO L226 Difference]: Without dead ends: 46216 [2021-08-21 13:40:34,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:40:35,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46216 states. [2021-08-21 13:40:37,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46216 to 41442. [2021-08-21 13:40:37,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41442 states, 41441 states have (on average 8.837938273690307) internal successors, (366253), 41441 states have internal predecessors, (366253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41442 states to 41442 states and 366253 transitions. [2021-08-21 13:40:38,017 INFO L78 Accepts]: Start accepts. Automaton has 41442 states and 366253 transitions. Word has length 43 [2021-08-21 13:40:38,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:40:38,017 INFO L470 AbstractCegarLoop]: Abstraction has 41442 states and 366253 transitions. [2021-08-21 13:40:38,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 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 13:40:38,018 INFO L276 IsEmpty]: Start isEmpty. Operand 41442 states and 366253 transitions. [2021-08-21 13:40:38,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 13:40:38,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:40:38,242 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:40:38,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 13:40:38,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:40:38,443 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:40:38,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:40:38,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1652653291, now seen corresponding path program 1 times [2021-08-21 13:40:38,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:40:38,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517093512] [2021-08-21 13:40:38,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:38,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:40:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:40:38,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:40:38,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517093512] [2021-08-21 13:40:38,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517093512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:38,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387417441] [2021-08-21 13:40:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:38,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:40:38,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:40:38,605 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 13:40:38,606 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 13:40:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:39,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 13:40:39,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:40:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:40:39,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387417441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:39,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:40:39,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 13:40:39,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654177964] [2021-08-21 13:40:39,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:40:39,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:40:39,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:40:39,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:40:39,502 INFO L87 Difference]: Start difference. First operand 41442 states and 366253 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 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 13:40:41,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:40:41,693 INFO L93 Difference]: Finished difference Result 70965 states and 627044 transitions. [2021-08-21 13:40:41,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:40:41,693 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-21 13:40:41,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:40:42,099 INFO L225 Difference]: With dead ends: 70965 [2021-08-21 13:40:42,099 INFO L226 Difference]: Without dead ends: 31305 [2021-08-21 13:40:42,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:40:42,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31305 states. [2021-08-21 13:40:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31305 to 30548. [2021-08-21 13:40:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30548 states, 30547 states have (on average 8.822404818803811) internal successors, (269498), 30547 states have internal predecessors, (269498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30548 states to 30548 states and 269498 transitions. [2021-08-21 13:40:43,991 INFO L78 Accepts]: Start accepts. Automaton has 30548 states and 269498 transitions. Word has length 45 [2021-08-21 13:40:43,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:40:43,991 INFO L470 AbstractCegarLoop]: Abstraction has 30548 states and 269498 transitions. [2021-08-21 13:40:43,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 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 13:40:43,992 INFO L276 IsEmpty]: Start isEmpty. Operand 30548 states and 269498 transitions. [2021-08-21 13:40:44,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 13:40:44,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:40:44,430 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:40:44,447 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 13:40:44,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:40:44,633 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 6 more)] === [2021-08-21 13:40:44,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:40:44,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1612925531, now seen corresponding path program 1 times [2021-08-21 13:40:44,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:40:44,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151577434] [2021-08-21 13:40:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:44,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:40:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:40:44,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:40:44,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151577434] [2021-08-21 13:40:44,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151577434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:44,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467966313] [2021-08-21 13:40:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:44,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:40:44,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:40:44,816 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 13:40:44,816 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 13:40:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:45,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-21 13:40:45,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:40:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:40:45,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467966313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:40:45,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:40:45,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 13:40:45,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183529911] [2021-08-21 13:40:45,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:40:45,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:40:45,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:40:45,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:40:45,339 INFO L87 Difference]: Start difference. First operand 30548 states and 269498 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:46,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:40:46,729 INFO L93 Difference]: Finished difference Result 30547 states and 269497 transitions. [2021-08-21 13:40:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 13:40:46,730 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 13:40:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:40:46,730 INFO L225 Difference]: With dead ends: 30547 [2021-08-21 13:40:46,730 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 13:40:46,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:40:46,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 13:40:46,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 13:40:46,731 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 13:40:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 13:40:46,731 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2021-08-21 13:40:46,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:40:46,731 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 13:40:46,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:40:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 13:40:46,731 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 13:40:46,733 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 13:40:46,734 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 13:40:46,734 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 13:40:46,734 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 13:40:46,734 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-21 13:40:46,734 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4INUSE_VIOLATION [2021-08-21 13:40:46,734 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5INUSE_VIOLATION [2021-08-21 13:40:46,734 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6INUSE_VIOLATION [2021-08-21 13:40:46,735 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7INUSE_VIOLATION [2021-08-21 13:40:46,735 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8INUSE_VIOLATION [2021-08-21 13:40:46,786 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 13:40:46,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-21 13:40:46,948 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 13:40:46,948 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 13:40:46,949 INFO L202 PluginConnector]: Adding new model incr-decr09.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:40:46 BasicIcfg [2021-08-21 13:40:46,949 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 13:40:46,950 INFO L168 Benchmark]: Toolchain (without parser) took 80680.41 ms. Allocated memory was 202.4 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 182.8 MB in the beginning and 6.4 GB in the end (delta: -6.2 GB). Peak memory consumption was 1.6 GB. Max. memory is 8.0 GB. [2021-08-21 13:40:46,951 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 202.4 MB. Free memory is still 183.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:40:46,951 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.21 ms. Allocated memory is still 202.4 MB. Free memory was 182.8 MB in the beginning and 181.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 13:40:46,951 INFO L168 Benchmark]: Boogie Preprocessor took 17.64 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 180.2 MB in the end (delta: 972.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:40:46,951 INFO L168 Benchmark]: RCFGBuilder took 219.78 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 169.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-08-21 13:40:46,951 INFO L168 Benchmark]: TraceAbstraction took 80414.64 ms. Allocated memory was 202.4 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 169.3 MB in the beginning and 6.4 GB in the end (delta: -6.2 GB). Peak memory consumption was 1.6 GB. Max. memory is 8.0 GB. [2021-08-21 13:40:46,952 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 202.4 MB. Free memory is still 183.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.21 ms. Allocated memory is still 202.4 MB. Free memory was 182.8 MB in the beginning and 181.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.64 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 180.2 MB in the end (delta: 972.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 219.78 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 169.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 80414.64 ms. Allocated memory was 202.4 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 169.3 MB in the beginning and 6.4 GB in the end (delta: -6.2 GB). Peak memory consumption was 1.6 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 28]: 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 11 procedures, 62 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 80270.9ms, OverallIterations: 10, TraceHistogramMax: 1, EmptinessCheckTime: 4628.4ms, AutomataDifference: 28986.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2194.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1174 SDtfs, 876 SDslu, 6553 SDs, 0 SdLazy, 6534 SolverSat, 720 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2689.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 412 GetRequests, 340 SyntacticMatches, 17 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 359.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=67398occurred in iteration=5, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 36694.6ms AutomataMinimizationTime, 10 MinimizatonAttempts, 83488 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 130.1ms SsaConstructionTime, 434.2ms SatisfiabilityAnalysisTime, 3541.0ms InterpolantComputationTime, 700 NumberOfCodeBlocks, 700 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 682 ConstructedInterpolants, 0 QuantifiedInterpolants, 4662 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1728 ConjunctsInSsa, 200 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 9/89 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 13:40:46,981 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...