/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:26:08,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:26:08,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:26:08,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:26:08,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 05:26:08,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 05:26:08,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 05:26:08,664 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 [2021-06-05 05:26:08,700 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:26:08,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:26:08,701 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:26:08,701 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:26:08,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:26:08,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:26:08,703 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:26:08,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:26:08,704 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:26:08,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:26:08,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:26:08,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:26:08,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:26:08,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:26:08,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:26:08,705 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:26:08,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:26:08,705 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:26:08,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:26:08,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:26:08,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:26:08,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:26:08,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:26:08,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:26:08,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:26:08,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:26:08,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:26:08,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:26:08,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:26:08,707 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:26:08,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:26:08,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:26:09,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:26:09,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:26:09,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:26:09,040 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:26:09,041 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:26:09,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl [2021-06-05 05:26:09,042 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl' [2021-06-05 05:26:09,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:26:09,078 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:26:09,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:26:09,079 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:26:09,080 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:26:09,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:26:09" (1/1) ... [2021-06-05 05:26:09,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:26:09" (1/1) ... [2021-06-05 05:26:09,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:26:09,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:26:09,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:26:09,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:26:09,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:26:09" (1/1) ... [2021-06-05 05:26:09,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:26:09" (1/1) ... [2021-06-05 05:26:09,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:26:09" (1/1) ... [2021-06-05 05:26:09,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:26:09" (1/1) ... [2021-06-05 05:26:09,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:26:09" (1/1) ... [2021-06-05 05:26:09,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:26:09" (1/1) ... [2021-06-05 05:26:09,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:26:09" (1/1) ... [2021-06-05 05:26:09,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:26:09,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:26:09,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:26:09,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:26:09,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:26:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:26:09,183 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:26:09,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:26:09,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:26:09,184 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:26:09,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:26:09,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:26:09,184 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:26:09,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:26:09,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:26:09,184 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 05:26:09,185 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 05:26:09,185 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 05:26:09,185 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 05:26:09,185 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 05:26:09,185 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 05:26:09,186 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 05:26:09,461 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:26:09,461 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:26:09,463 INFO L202 PluginConnector]: Adding new model difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:26:09 BoogieIcfgContainer [2021-06-05 05:26:09,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:26:09,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:26:09,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:26:09,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:26:09,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:26:09" (1/2) ... [2021-06-05 05:26:09,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5afd5e36 and model type difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:26:09, skipping insertion in model container [2021-06-05 05:26:09,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:26:09" (2/2) ... [2021-06-05 05:26:09,469 INFO L111 eAbstractionObserver]: Analyzing ICFG difference-det.wvr.bpl [2021-06-05 05:26:09,490 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:26:09,490 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:26:09,490 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:26:09,491 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:26:09,562 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 05:26:09,580 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 05:26:09,596 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:26:09,597 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:26:09,597 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:26:09,597 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:26:09,597 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:26:09,597 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:26:09,597 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:26:09,597 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:26:09,605 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 40 transitions, 112 flow [2021-06-05 05:26:09,638 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:09,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:09,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:26:09,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:09,654 INFO L521 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] [2021-06-05 05:26:09,654 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:09,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:09,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1838723412, now seen corresponding path program 1 times [2021-06-05 05:26:09,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:09,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235193845] [2021-06-05 05:26:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:09,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:09,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235193845] [2021-06-05 05:26:09,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235193845] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:26:09,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:26:09,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:26:09,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360590606] [2021-06-05 05:26:09,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:26:09,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:09,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:26:09,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:26:09,915 INFO L87 Difference]: Start difference. First operand has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:10,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:10,013 INFO L93 Difference]: Finished difference Result 1268 states and 4623 transitions. [2021-06-05 05:26:10,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:26:10,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:26:10,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:10,036 INFO L225 Difference]: With dead ends: 1268 [2021-06-05 05:26:10,036 INFO L226 Difference]: Without dead ends: 1057 [2021-06-05 05:26:10,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:26:10,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-06-05 05:26:10,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 776. [2021-06-05 05:26:10,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.7716129032258063) internal successors, (2923), 775 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:10,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2923 transitions. [2021-06-05 05:26:10,150 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2923 transitions. Word has length 26 [2021-06-05 05:26:10,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:10,150 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2923 transitions. [2021-06-05 05:26:10,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2923 transitions. [2021-06-05 05:26:10,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:26:10,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:10,156 INFO L521 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] [2021-06-05 05:26:10,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:26:10,157 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:10,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:10,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1812651438, now seen corresponding path program 1 times [2021-06-05 05:26:10,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:10,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121781443] [2021-06-05 05:26:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:10,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:10,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121781443] [2021-06-05 05:26:10,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121781443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:10,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206594712] [2021-06-05 05:26:10,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:10,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:26:10,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:10,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206594712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:10,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:10,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 05:26:10,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393278412] [2021-06-05 05:26:10,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:26:10,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:10,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:26:10,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:26:10,521 INFO L87 Difference]: Start difference. First operand 776 states and 2923 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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) [2021-06-05 05:26:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:10,654 INFO L93 Difference]: Finished difference Result 1233 states and 4561 transitions. [2021-06-05 05:26:10,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:26:10,655 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 28 [2021-06-05 05:26:10,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:10,664 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 05:26:10,664 INFO L226 Difference]: Without dead ends: 1233 [2021-06-05 05:26:10,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:26:10,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-05 05:26:10,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 868. [2021-06-05 05:26:10,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.795847750865052) internal successors, (3291), 867 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3291 transitions. [2021-06-05 05:26:10,710 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3291 transitions. Word has length 28 [2021-06-05 05:26:10,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:10,710 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3291 transitions. [2021-06-05 05:26:10,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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) [2021-06-05 05:26:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3291 transitions. [2021-06-05 05:26:10,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:26:10,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:10,714 INFO L521 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] [2021-06-05 05:26:10,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 05:26:10,921 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:10,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:10,922 INFO L82 PathProgramCache]: Analyzing trace with hash 56282868, now seen corresponding path program 1 times [2021-06-05 05:26:10,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:10,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165111662] [2021-06-05 05:26:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:10,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:10,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165111662] [2021-06-05 05:26:10,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165111662] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:26:10,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:26:10,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:26:10,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835368083] [2021-06-05 05:26:10,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:26:10,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:10,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:26:10,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:26:10,977 INFO L87 Difference]: Start difference. First operand 868 states and 3291 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:11,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:11,042 INFO L93 Difference]: Finished difference Result 1101 states and 3979 transitions. [2021-06-05 05:26:11,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:26:11,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:26:11,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:11,050 INFO L225 Difference]: With dead ends: 1101 [2021-06-05 05:26:11,050 INFO L226 Difference]: Without dead ends: 1047 [2021-06-05 05:26:11,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:26:11,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-06-05 05:26:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 912. [2021-06-05 05:26:11,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 3.773874862788145) internal successors, (3438), 911 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 3438 transitions. [2021-06-05 05:26:11,086 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 3438 transitions. Word has length 28 [2021-06-05 05:26:11,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:11,086 INFO L482 AbstractCegarLoop]: Abstraction has 912 states and 3438 transitions. [2021-06-05 05:26:11,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:11,087 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 3438 transitions. [2021-06-05 05:26:11,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:26:11,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:11,090 INFO L521 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] [2021-06-05 05:26:11,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 05:26:11,091 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:11,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:11,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1752946356, now seen corresponding path program 2 times [2021-06-05 05:26:11,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:11,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231066808] [2021-06-05 05:26:11,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:11,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:11,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231066808] [2021-06-05 05:26:11,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231066808] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:26:11,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:26:11,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:26:11,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570294208] [2021-06-05 05:26:11,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:26:11,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:11,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:26:11,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:26:11,176 INFO L87 Difference]: Start difference. First operand 912 states and 3438 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:11,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:11,249 INFO L93 Difference]: Finished difference Result 834 states and 3134 transitions. [2021-06-05 05:26:11,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:26:11,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:26:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:11,255 INFO L225 Difference]: With dead ends: 834 [2021-06-05 05:26:11,255 INFO L226 Difference]: Without dead ends: 834 [2021-06-05 05:26:11,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:26:11,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-06-05 05:26:11,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 774. [2021-06-05 05:26:11,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.8007761966364813) internal successors, (2938), 773 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2938 transitions. [2021-06-05 05:26:11,280 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2938 transitions. Word has length 28 [2021-06-05 05:26:11,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:11,280 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2938 transitions. [2021-06-05 05:26:11,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:11,281 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2938 transitions. [2021-06-05 05:26:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:26:11,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:11,283 INFO L521 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] [2021-06-05 05:26:11,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 05:26:11,283 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:11,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:11,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1894118288, now seen corresponding path program 2 times [2021-06-05 05:26:11,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:11,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35885590] [2021-06-05 05:26:11,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:11,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:11,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35885590] [2021-06-05 05:26:11,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35885590] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:26:11,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:26:11,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:26:11,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12627546] [2021-06-05 05:26:11,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:26:11,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:11,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:26:11,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:26:11,345 INFO L87 Difference]: Start difference. First operand 774 states and 2938 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:11,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:11,407 INFO L93 Difference]: Finished difference Result 878 states and 3300 transitions. [2021-06-05 05:26:11,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:26:11,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:26:11,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:11,413 INFO L225 Difference]: With dead ends: 878 [2021-06-05 05:26:11,413 INFO L226 Difference]: Without dead ends: 838 [2021-06-05 05:26:11,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:26:11,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-06-05 05:26:11,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 726. [2021-06-05 05:26:11,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.8096551724137933) internal successors, (2762), 725 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2762 transitions. [2021-06-05 05:26:11,440 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2762 transitions. Word has length 28 [2021-06-05 05:26:11,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:11,440 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2762 transitions. [2021-06-05 05:26:11,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:11,441 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2762 transitions. [2021-06-05 05:26:11,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:26:11,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:11,443 INFO L521 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] [2021-06-05 05:26:11,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 05:26:11,443 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:11,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:11,444 INFO L82 PathProgramCache]: Analyzing trace with hash 73332850, now seen corresponding path program 1 times [2021-06-05 05:26:11,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:11,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326267832] [2021-06-05 05:26:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:11,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:11,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326267832] [2021-06-05 05:26:11,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326267832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:11,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903546894] [2021-06-05 05:26:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:11,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:26:11,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:11,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903546894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:11,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:11,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-06-05 05:26:11,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173426524] [2021-06-05 05:26:11,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:26:11,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:11,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:26:11,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:26:11,741 INFO L87 Difference]: Start difference. First operand 726 states and 2762 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:11,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:11,840 INFO L93 Difference]: Finished difference Result 3314 states and 12458 transitions. [2021-06-05 05:26:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:26:11,841 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:26:11,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:11,859 INFO L225 Difference]: With dead ends: 3314 [2021-06-05 05:26:11,859 INFO L226 Difference]: Without dead ends: 3000 [2021-06-05 05:26:11,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:26:11,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-06-05 05:26:11,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2163. [2021-06-05 05:26:11,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.01063829787234) internal successors, (8671), 2162 states have internal predecessors, (8671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 8671 transitions. [2021-06-05 05:26:11,943 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 8671 transitions. Word has length 30 [2021-06-05 05:26:11,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:11,943 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 8671 transitions. [2021-06-05 05:26:11,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:11,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 8671 transitions. [2021-06-05 05:26:11,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:26:11,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:11,951 INFO L521 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] [2021-06-05 05:26:12,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:12,173 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:12,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:12,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2051184466, now seen corresponding path program 2 times [2021-06-05 05:26:12,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:12,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786109208] [2021-06-05 05:26:12,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:26:12,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:12,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786109208] [2021-06-05 05:26:12,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786109208] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:26:12,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:26:12,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:26:12,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654038220] [2021-06-05 05:26:12,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:26:12,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:12,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:26:12,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:26:12,237 INFO L87 Difference]: Start difference. First operand 2163 states and 8671 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:12,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:12,317 INFO L93 Difference]: Finished difference Result 3426 states and 13470 transitions. [2021-06-05 05:26:12,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:26:12,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:26:12,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:12,338 INFO L225 Difference]: With dead ends: 3426 [2021-06-05 05:26:12,338 INFO L226 Difference]: Without dead ends: 3395 [2021-06-05 05:26:12,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:26:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-06-05 05:26:12,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 2948. [2021-06-05 05:26:12,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 4.058025110281642) internal successors, (11959), 2947 states have internal predecessors, (11959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:12,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 11959 transitions. [2021-06-05 05:26:12,436 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 11959 transitions. Word has length 30 [2021-06-05 05:26:12,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:12,437 INFO L482 AbstractCegarLoop]: Abstraction has 2948 states and 11959 transitions. [2021-06-05 05:26:12,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:12,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 11959 transitions. [2021-06-05 05:26:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:26:12,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:12,446 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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] [2021-06-05 05:26:12,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 05:26:12,447 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash -721503632, now seen corresponding path program 3 times [2021-06-05 05:26:12,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:12,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221204739] [2021-06-05 05:26:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:12,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:12,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221204739] [2021-06-05 05:26:12,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221204739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:12,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587802049] [2021-06-05 05:26:12,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:12,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:26:12,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:12,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:26:12,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:12,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587802049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:12,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:12,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 05:26:12,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390333872] [2021-06-05 05:26:12,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:26:12,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:12,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:26:12,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:26:12,785 INFO L87 Difference]: Start difference. First operand 2948 states and 11959 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:13,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:13,206 INFO L93 Difference]: Finished difference Result 10235 states and 40121 transitions. [2021-06-05 05:26:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:26:13,206 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:26:13,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:13,268 INFO L225 Difference]: With dead ends: 10235 [2021-06-05 05:26:13,268 INFO L226 Difference]: Without dead ends: 10235 [2021-06-05 05:26:13,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 299.2ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:26:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10235 states. [2021-06-05 05:26:13,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10235 to 4372. [2021-06-05 05:26:13,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 4371 states have (on average 4.153511782200869) internal successors, (18155), 4371 states have internal predecessors, (18155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:13,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 18155 transitions. [2021-06-05 05:26:13,481 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 18155 transitions. Word has length 32 [2021-06-05 05:26:13,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:13,482 INFO L482 AbstractCegarLoop]: Abstraction has 4372 states and 18155 transitions. [2021-06-05 05:26:13,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:13,483 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 18155 transitions. [2021-06-05 05:26:13,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:26:13,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:13,496 INFO L521 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] [2021-06-05 05:26:13,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:13,709 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:13,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:13,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1838023666, now seen corresponding path program 1 times [2021-06-05 05:26:13,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:13,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472316497] [2021-06-05 05:26:13,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:26:13,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:13,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472316497] [2021-06-05 05:26:13,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472316497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:13,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602378097] [2021-06-05 05:26:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:13,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:26:13,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:26:13,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602378097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:13,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:13,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 05:26:13,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329766503] [2021-06-05 05:26:13,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:26:13,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:13,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:26:13,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:26:13,915 INFO L87 Difference]: Start difference. First operand 4372 states and 18155 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:14,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:14,089 INFO L93 Difference]: Finished difference Result 8631 states and 35204 transitions. [2021-06-05 05:26:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:26:14,090 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:26:14,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:14,123 INFO L225 Difference]: With dead ends: 8631 [2021-06-05 05:26:14,123 INFO L226 Difference]: Without dead ends: 8631 [2021-06-05 05:26:14,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:26:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8631 states. [2021-06-05 05:26:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8631 to 5549. [2021-06-05 05:26:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 4.195385724585436) internal successors, (23276), 5548 states have internal predecessors, (23276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:14,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 23276 transitions. [2021-06-05 05:26:14,310 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 23276 transitions. Word has length 32 [2021-06-05 05:26:14,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:14,311 INFO L482 AbstractCegarLoop]: Abstraction has 5549 states and 23276 transitions. [2021-06-05 05:26:14,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:14,311 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 23276 transitions. [2021-06-05 05:26:14,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:26:14,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:14,328 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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] [2021-06-05 05:26:14,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:14,551 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:14,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:14,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1572403148, now seen corresponding path program 4 times [2021-06-05 05:26:14,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:14,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475827543] [2021-06-05 05:26:14,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:14,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:14,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475827543] [2021-06-05 05:26:14,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475827543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:14,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578689026] [2021-06-05 05:26:14,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:14,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:26:14,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:14,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:26:14,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:14,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578689026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:14,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:14,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 05:26:14,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058768401] [2021-06-05 05:26:14,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:26:14,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:14,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:26:14,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:26:14,758 INFO L87 Difference]: Start difference. First operand 5549 states and 23276 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:15,156 INFO L93 Difference]: Finished difference Result 15361 states and 62588 transitions. [2021-06-05 05:26:15,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:26:15,157 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:26:15,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:15,212 INFO L225 Difference]: With dead ends: 15361 [2021-06-05 05:26:15,212 INFO L226 Difference]: Without dead ends: 15091 [2021-06-05 05:26:15,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 245.9ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:26:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2021-06-05 05:26:15,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 8451. [2021-06-05 05:26:15,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8451 states, 8450 states have (on average 4.295739644970414) internal successors, (36299), 8450 states have internal predecessors, (36299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8451 states to 8451 states and 36299 transitions. [2021-06-05 05:26:15,493 INFO L78 Accepts]: Start accepts. Automaton has 8451 states and 36299 transitions. Word has length 32 [2021-06-05 05:26:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:15,493 INFO L482 AbstractCegarLoop]: Abstraction has 8451 states and 36299 transitions. [2021-06-05 05:26:15,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:15,493 INFO L276 IsEmpty]: Start isEmpty. Operand 8451 states and 36299 transitions. [2021-06-05 05:26:15,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:26:15,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:15,514 INFO L521 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] [2021-06-05 05:26:15,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 05:26:15,736 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:15,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:15,736 INFO L82 PathProgramCache]: Analyzing trace with hash 825554672, now seen corresponding path program 1 times [2021-06-05 05:26:15,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:15,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208292531] [2021-06-05 05:26:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:26:15,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:15,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208292531] [2021-06-05 05:26:15,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208292531] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:26:15,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:26:15,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 05:26:15,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915978630] [2021-06-05 05:26:15,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:26:15,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:15,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:26:15,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:26:15,771 INFO L87 Difference]: Start difference. First operand 8451 states and 36299 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:15,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:15,932 INFO L93 Difference]: Finished difference Result 11634 states and 49174 transitions. [2021-06-05 05:26:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:26:15,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:26:15,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:15,963 INFO L225 Difference]: With dead ends: 11634 [2021-06-05 05:26:15,964 INFO L226 Difference]: Without dead ends: 11496 [2021-06-05 05:26:15,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:26:15,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11496 states. [2021-06-05 05:26:16,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11496 to 9206. [2021-06-05 05:26:16,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9206 states, 9205 states have (on average 4.329277566539924) internal successors, (39851), 9205 states have internal predecessors, (39851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9206 states to 9206 states and 39851 transitions. [2021-06-05 05:26:16,294 INFO L78 Accepts]: Start accepts. Automaton has 9206 states and 39851 transitions. Word has length 32 [2021-06-05 05:26:16,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:16,294 INFO L482 AbstractCegarLoop]: Abstraction has 9206 states and 39851 transitions. [2021-06-05 05:26:16,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:16,294 INFO L276 IsEmpty]: Start isEmpty. Operand 9206 states and 39851 transitions. [2021-06-05 05:26:16,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:26:16,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:16,320 INFO L521 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] [2021-06-05 05:26:16,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 05:26:16,321 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:16,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1089339216, now seen corresponding path program 2 times [2021-06-05 05:26:16,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:16,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500334635] [2021-06-05 05:26:16,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:26:16,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:16,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500334635] [2021-06-05 05:26:16,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500334635] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:26:16,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:26:16,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 05:26:16,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382768076] [2021-06-05 05:26:16,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:26:16,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:16,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:26:16,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:26:16,365 INFO L87 Difference]: Start difference. First operand 9206 states and 39851 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:16,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:16,545 INFO L93 Difference]: Finished difference Result 10977 states and 46247 transitions. [2021-06-05 05:26:16,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:26:16,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:26:16,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:16,574 INFO L225 Difference]: With dead ends: 10977 [2021-06-05 05:26:16,574 INFO L226 Difference]: Without dead ends: 10950 [2021-06-05 05:26:16,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:26:16,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-06-05 05:26:16,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 9177. [2021-06-05 05:26:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9177 states, 9176 states have (on average 4.283129904097646) internal successors, (39302), 9176 states have internal predecessors, (39302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:16,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9177 states to 9177 states and 39302 transitions. [2021-06-05 05:26:16,889 INFO L78 Accepts]: Start accepts. Automaton has 9177 states and 39302 transitions. Word has length 32 [2021-06-05 05:26:16,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:16,889 INFO L482 AbstractCegarLoop]: Abstraction has 9177 states and 39302 transitions. [2021-06-05 05:26:16,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:16,889 INFO L276 IsEmpty]: Start isEmpty. Operand 9177 states and 39302 transitions. [2021-06-05 05:26:16,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:26:16,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:16,913 INFO L521 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] [2021-06-05 05:26:16,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 05:26:16,913 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:16,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:16,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1444113172, now seen corresponding path program 2 times [2021-06-05 05:26:16,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:16,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981049513] [2021-06-05 05:26:16,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:26:16,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:16,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981049513] [2021-06-05 05:26:16,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981049513] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:26:16,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:26:16,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 05:26:16,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961568428] [2021-06-05 05:26:16,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:26:16,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:16,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:26:16,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:26:16,946 INFO L87 Difference]: Start difference. First operand 9177 states and 39302 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:17,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:17,137 INFO L93 Difference]: Finished difference Result 11062 states and 46211 transitions. [2021-06-05 05:26:17,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:26:17,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:26:17,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:17,161 INFO L225 Difference]: With dead ends: 11062 [2021-06-05 05:26:17,161 INFO L226 Difference]: Without dead ends: 11002 [2021-06-05 05:26:17,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:26:17,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11002 states. [2021-06-05 05:26:17,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11002 to 9261. [2021-06-05 05:26:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9261 states, 9260 states have (on average 4.27645788336933) internal successors, (39600), 9260 states have internal predecessors, (39600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9261 states to 9261 states and 39600 transitions. [2021-06-05 05:26:17,468 INFO L78 Accepts]: Start accepts. Automaton has 9261 states and 39600 transitions. Word has length 32 [2021-06-05 05:26:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:17,468 INFO L482 AbstractCegarLoop]: Abstraction has 9261 states and 39600 transitions. [2021-06-05 05:26:17,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 9261 states and 39600 transitions. [2021-06-05 05:26:17,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:26:17,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:17,491 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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] [2021-06-05 05:26:17,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 05:26:17,492 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:17,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:17,492 INFO L82 PathProgramCache]: Analyzing trace with hash 464079412, now seen corresponding path program 5 times [2021-06-05 05:26:17,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:17,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393597870] [2021-06-05 05:26:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:17,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:17,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393597870] [2021-06-05 05:26:17,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393597870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:17,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990454209] [2021-06-05 05:26:17,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:17,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:26:17,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:17,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:26:17,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:17,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990454209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:17,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:17,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 05:26:17,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146380533] [2021-06-05 05:26:17,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:26:17,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:17,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:26:17,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:26:17,714 INFO L87 Difference]: Start difference. First operand 9261 states and 39600 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:18,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:18,158 INFO L93 Difference]: Finished difference Result 17289 states and 70842 transitions. [2021-06-05 05:26:18,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:26:18,159 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:26:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:18,198 INFO L225 Difference]: With dead ends: 17289 [2021-06-05 05:26:18,198 INFO L226 Difference]: Without dead ends: 17289 [2021-06-05 05:26:18,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:26:18,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17289 states. [2021-06-05 05:26:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17289 to 10772. [2021-06-05 05:26:18,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10772 states, 10771 states have (on average 4.3019218271284005) internal successors, (46336), 10771 states have internal predecessors, (46336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:18,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10772 states to 10772 states and 46336 transitions. [2021-06-05 05:26:18,559 INFO L78 Accepts]: Start accepts. Automaton has 10772 states and 46336 transitions. Word has length 32 [2021-06-05 05:26:18,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:18,559 INFO L482 AbstractCegarLoop]: Abstraction has 10772 states and 46336 transitions. [2021-06-05 05:26:18,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:18,559 INFO L276 IsEmpty]: Start isEmpty. Operand 10772 states and 46336 transitions. [2021-06-05 05:26:18,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:26:18,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:18,667 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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] [2021-06-05 05:26:18,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:18,868 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:18,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:18,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1111982064, now seen corresponding path program 6 times [2021-06-05 05:26:18,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:18,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551303692] [2021-06-05 05:26:18,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:18,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:18,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551303692] [2021-06-05 05:26:18,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551303692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:18,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822328636] [2021-06-05 05:26:18,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:18,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:26:18,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:18,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:26:18,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:19,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822328636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:19,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:19,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 05:26:19,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034982414] [2021-06-05 05:26:19,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:26:19,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:19,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:26:19,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:26:19,141 INFO L87 Difference]: Start difference. First operand 10772 states and 46336 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:19,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:19,496 INFO L93 Difference]: Finished difference Result 17283 states and 70897 transitions. [2021-06-05 05:26:19,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:26:19,497 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:26:19,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:19,538 INFO L225 Difference]: With dead ends: 17283 [2021-06-05 05:26:19,538 INFO L226 Difference]: Without dead ends: 17145 [2021-06-05 05:26:19,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:26:19,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17145 states. [2021-06-05 05:26:19,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17145 to 10795. [2021-06-05 05:26:19,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10795 states, 10794 states have (on average 4.285158421345192) internal successors, (46254), 10794 states have internal predecessors, (46254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10795 states to 10795 states and 46254 transitions. [2021-06-05 05:26:19,860 INFO L78 Accepts]: Start accepts. Automaton has 10795 states and 46254 transitions. Word has length 32 [2021-06-05 05:26:19,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:19,860 INFO L482 AbstractCegarLoop]: Abstraction has 10795 states and 46254 transitions. [2021-06-05 05:26:19,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:19,861 INFO L276 IsEmpty]: Start isEmpty. Operand 10795 states and 46254 transitions. [2021-06-05 05:26:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:26:19,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:19,877 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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] [2021-06-05 05:26:20,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:26:20,078 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:20,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:20,079 INFO L82 PathProgramCache]: Analyzing trace with hash 416936404, now seen corresponding path program 7 times [2021-06-05 05:26:20,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:20,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69182661] [2021-06-05 05:26:20,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:26:20,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:20,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69182661] [2021-06-05 05:26:20,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69182661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:20,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029986592] [2021-06-05 05:26:20,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:20,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:26:20,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:20,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029986592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:20,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:20,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 05:26:20,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081710920] [2021-06-05 05:26:20,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:26:20,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:20,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:26:20,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:26:20,427 INFO L87 Difference]: Start difference. First operand 10795 states and 46254 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:20,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:20,959 INFO L93 Difference]: Finished difference Result 26096 states and 108482 transitions. [2021-06-05 05:26:20,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:26:20,959 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:26:20,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:21,031 INFO L225 Difference]: With dead ends: 26096 [2021-06-05 05:26:21,031 INFO L226 Difference]: Without dead ends: 26096 [2021-06-05 05:26:21,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:26:21,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26096 states. [2021-06-05 05:26:21,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26096 to 14993. [2021-06-05 05:26:21,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14993 states, 14992 states have (on average 4.368729989327641) internal successors, (65496), 14992 states have internal predecessors, (65496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:21,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14993 states to 14993 states and 65496 transitions. [2021-06-05 05:26:21,510 INFO L78 Accepts]: Start accepts. Automaton has 14993 states and 65496 transitions. Word has length 32 [2021-06-05 05:26:21,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:21,510 INFO L482 AbstractCegarLoop]: Abstraction has 14993 states and 65496 transitions. [2021-06-05 05:26:21,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:21,510 INFO L276 IsEmpty]: Start isEmpty. Operand 14993 states and 65496 transitions. [2021-06-05 05:26:21,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:26:21,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:21,538 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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] [2021-06-05 05:26:21,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 05:26:21,741 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:21,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:21,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1927074446, now seen corresponding path program 8 times [2021-06-05 05:26:21,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:21,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027668791] [2021-06-05 05:26:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:26:21,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:21,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027668791] [2021-06-05 05:26:21,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027668791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:21,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644952676] [2021-06-05 05:26:21,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:21,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:26:21,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:21,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:26:21,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:21,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644952676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:21,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:21,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 05:26:21,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157534554] [2021-06-05 05:26:21,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:26:21,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:21,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:26:21,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:26:21,976 INFO L87 Difference]: Start difference. First operand 14993 states and 65496 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:22,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:22,489 INFO L93 Difference]: Finished difference Result 19071 states and 81167 transitions. [2021-06-05 05:26:22,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:26:22,490 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:26:22,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:22,535 INFO L225 Difference]: With dead ends: 19071 [2021-06-05 05:26:22,536 INFO L226 Difference]: Without dead ends: 19009 [2021-06-05 05:26:22,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:26:22,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19009 states. [2021-06-05 05:26:22,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19009 to 15495. [2021-06-05 05:26:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15495 states, 15494 states have (on average 4.3805344004130635) internal successors, (67872), 15494 states have internal predecessors, (67872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15495 states to 15495 states and 67872 transitions. [2021-06-05 05:26:22,985 INFO L78 Accepts]: Start accepts. Automaton has 15495 states and 67872 transitions. Word has length 32 [2021-06-05 05:26:22,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:22,985 INFO L482 AbstractCegarLoop]: Abstraction has 15495 states and 67872 transitions. [2021-06-05 05:26:22,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:22,985 INFO L276 IsEmpty]: Start isEmpty. Operand 15495 states and 67872 transitions. [2021-06-05 05:26:23,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:26:23,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:23,014 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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] [2021-06-05 05:26:23,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 05:26:23,223 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:23,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:23,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1333496630, now seen corresponding path program 9 times [2021-06-05 05:26:23,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:23,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241657565] [2021-06-05 05:26:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:26:23,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:23,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241657565] [2021-06-05 05:26:23,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241657565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:23,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467934525] [2021-06-05 05:26:23,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:23,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:26:23,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:23,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:26:23,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:23,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467934525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:23,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:23,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 05:26:23,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285465176] [2021-06-05 05:26:23,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:26:23,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:23,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:26:23,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:26:23,457 INFO L87 Difference]: Start difference. First operand 15495 states and 67872 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:23,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:23,929 INFO L93 Difference]: Finished difference Result 25596 states and 106759 transitions. [2021-06-05 05:26:23,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:26:23,930 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:26:23,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:24,002 INFO L225 Difference]: With dead ends: 25596 [2021-06-05 05:26:24,003 INFO L226 Difference]: Without dead ends: 25518 [2021-06-05 05:26:24,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 205.4ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:26:24,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25518 states. [2021-06-05 05:26:24,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25518 to 15518. [2021-06-05 05:26:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15518 states, 15517 states have (on average 4.374299155764645) internal successors, (67876), 15517 states have internal predecessors, (67876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15518 states to 15518 states and 67876 transitions. [2021-06-05 05:26:24,512 INFO L78 Accepts]: Start accepts. Automaton has 15518 states and 67876 transitions. Word has length 32 [2021-06-05 05:26:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:24,512 INFO L482 AbstractCegarLoop]: Abstraction has 15518 states and 67876 transitions. [2021-06-05 05:26:24,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:24,512 INFO L276 IsEmpty]: Start isEmpty. Operand 15518 states and 67876 transitions. [2021-06-05 05:26:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:26:24,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:24,548 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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] [2021-06-05 05:26:24,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 05:26:24,765 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:24,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:24,765 INFO L82 PathProgramCache]: Analyzing trace with hash -126625480, now seen corresponding path program 10 times [2021-06-05 05:26:24,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:24,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044529350] [2021-06-05 05:26:24,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:24,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:24,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044529350] [2021-06-05 05:26:24,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044529350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:24,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041800714] [2021-06-05 05:26:24,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:24,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:26:24,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:24,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:26:24,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:25,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041800714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:25,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:25,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 05:26:25,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376958298] [2021-06-05 05:26:25,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:26:25,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:25,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:26:25,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:26:25,005 INFO L87 Difference]: Start difference. First operand 15518 states and 67876 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:25,456 INFO L93 Difference]: Finished difference Result 25214 states and 104840 transitions. [2021-06-05 05:26:25,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:26:25,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:26:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:25,526 INFO L225 Difference]: With dead ends: 25214 [2021-06-05 05:26:25,526 INFO L226 Difference]: Without dead ends: 25094 [2021-06-05 05:26:25,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 294.7ms TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:26:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25094 states. [2021-06-05 05:26:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25094 to 16132. [2021-06-05 05:26:26,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16132 states, 16131 states have (on average 4.372140598846941) internal successors, (70527), 16131 states have internal predecessors, (70527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 70527 transitions. [2021-06-05 05:26:26,069 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 70527 transitions. Word has length 32 [2021-06-05 05:26:26,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:26,069 INFO L482 AbstractCegarLoop]: Abstraction has 16132 states and 70527 transitions. [2021-06-05 05:26:26,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:26,069 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 70527 transitions. [2021-06-05 05:26:26,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:26:26,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:26,098 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:26,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:26,298 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:26,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:26,299 INFO L82 PathProgramCache]: Analyzing trace with hash -906083662, now seen corresponding path program 11 times [2021-06-05 05:26:26,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:26,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399682802] [2021-06-05 05:26:26,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:26,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:26,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399682802] [2021-06-05 05:26:26,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399682802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:26,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623966849] [2021-06-05 05:26:26,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:26,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:26:26,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:26,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 05:26:26,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:26,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623966849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:26,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:26,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-06-05 05:26:26,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401387096] [2021-06-05 05:26:26,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:26:26,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:26,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:26:26,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:26:26,670 INFO L87 Difference]: Start difference. First operand 16132 states and 70527 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:26,966 INFO L93 Difference]: Finished difference Result 30028 states and 127196 transitions. [2021-06-05 05:26:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:26:26,966 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 05:26:26,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:27,046 INFO L225 Difference]: With dead ends: 30028 [2021-06-05 05:26:27,046 INFO L226 Difference]: Without dead ends: 29440 [2021-06-05 05:26:27,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 227.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:26:27,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29440 states. [2021-06-05 05:26:27,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29440 to 21834. [2021-06-05 05:26:27,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21834 states, 21833 states have (on average 4.3858379517244535) internal successors, (95756), 21833 states have internal predecessors, (95756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21834 states to 21834 states and 95756 transitions. [2021-06-05 05:26:27,650 INFO L78 Accepts]: Start accepts. Automaton has 21834 states and 95756 transitions. Word has length 34 [2021-06-05 05:26:27,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:27,651 INFO L482 AbstractCegarLoop]: Abstraction has 21834 states and 95756 transitions. [2021-06-05 05:26:27,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:27,651 INFO L276 IsEmpty]: Start isEmpty. Operand 21834 states and 95756 transitions. [2021-06-05 05:26:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:26:27,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:27,691 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:27,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:27,891 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:27,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:27,892 INFO L82 PathProgramCache]: Analyzing trace with hash 778013198, now seen corresponding path program 12 times [2021-06-05 05:26:27,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:27,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676878023] [2021-06-05 05:26:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:27,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:26:27,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:27,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676878023] [2021-06-05 05:26:27,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676878023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:27,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684854376] [2021-06-05 05:26:27,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:27,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:26:27,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:27,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 05:26:28,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:28,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:28,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684854376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:28,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:28,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-06-05 05:26:28,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701162885] [2021-06-05 05:26:28,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:26:28,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:28,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:26:28,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:26:28,118 INFO L87 Difference]: Start difference. First operand 21834 states and 95756 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:28,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:28,783 INFO L93 Difference]: Finished difference Result 60940 states and 262767 transitions. [2021-06-05 05:26:28,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:26:28,784 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 05:26:28,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:28,995 INFO L225 Difference]: With dead ends: 60940 [2021-06-05 05:26:28,995 INFO L226 Difference]: Without dead ends: 58958 [2021-06-05 05:26:28,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:26:29,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58958 states. [2021-06-05 05:26:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58958 to 39850. [2021-06-05 05:26:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39850 states, 39849 states have (on average 4.48199452934829) internal successors, (178603), 39849 states have internal predecessors, (178603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:30,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39850 states to 39850 states and 178603 transitions. [2021-06-05 05:26:30,579 INFO L78 Accepts]: Start accepts. Automaton has 39850 states and 178603 transitions. Word has length 34 [2021-06-05 05:26:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:30,579 INFO L482 AbstractCegarLoop]: Abstraction has 39850 states and 178603 transitions. [2021-06-05 05:26:30,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 39850 states and 178603 transitions. [2021-06-05 05:26:30,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:26:30,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:30,656 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:26:30,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 05:26:30,858 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:30,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:30,858 INFO L82 PathProgramCache]: Analyzing trace with hash 582128274, now seen corresponding path program 13 times [2021-06-05 05:26:30,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:30,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216576788] [2021-06-05 05:26:30,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:26:30,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:30,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216576788] [2021-06-05 05:26:30,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216576788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:30,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808983654] [2021-06-05 05:26:30,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:30,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 05:26:30,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:31,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808983654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:31,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:31,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-06-05 05:26:31,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867758850] [2021-06-05 05:26:31,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:26:31,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:31,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:26:31,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:26:31,068 INFO L87 Difference]: Start difference. First operand 39850 states and 178603 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:31,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:31,791 INFO L93 Difference]: Finished difference Result 60941 states and 268418 transitions. [2021-06-05 05:26:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:26:31,791 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 05:26:31,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:32,058 INFO L225 Difference]: With dead ends: 60941 [2021-06-05 05:26:32,058 INFO L226 Difference]: Without dead ends: 60279 [2021-06-05 05:26:32,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:26:32,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60279 states. [2021-06-05 05:26:33,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60279 to 54948. [2021-06-05 05:26:33,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54948 states, 54947 states have (on average 4.507143247129052) internal successors, (247654), 54947 states have internal predecessors, (247654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:34,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54948 states to 54948 states and 247654 transitions. [2021-06-05 05:26:34,128 INFO L78 Accepts]: Start accepts. Automaton has 54948 states and 247654 transitions. Word has length 34 [2021-06-05 05:26:34,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:34,128 INFO L482 AbstractCegarLoop]: Abstraction has 54948 states and 247654 transitions. [2021-06-05 05:26:34,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:34,128 INFO L276 IsEmpty]: Start isEmpty. Operand 54948 states and 247654 transitions. [2021-06-05 05:26:34,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:26:34,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:34,279 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2021-06-05 05:26:34,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:34,479 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:34,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:34,480 INFO L82 PathProgramCache]: Analyzing trace with hash -523184720, now seen corresponding path program 14 times [2021-06-05 05:26:34,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:34,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264298430] [2021-06-05 05:26:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:34,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:34,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264298430] [2021-06-05 05:26:34,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264298430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:34,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713235485] [2021-06-05 05:26:34,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:34,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:26:34,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:34,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:26:34,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:34,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713235485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:34,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:34,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 05:26:34,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418921650] [2021-06-05 05:26:34,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:26:34,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:34,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:26:34,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:26:34,738 INFO L87 Difference]: Start difference. First operand 54948 states and 247654 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:36,174 INFO L93 Difference]: Finished difference Result 115835 states and 498368 transitions. [2021-06-05 05:26:36,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:26:36,174 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:26:36,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:36,592 INFO L225 Difference]: With dead ends: 115835 [2021-06-05 05:26:36,592 INFO L226 Difference]: Without dead ends: 115835 [2021-06-05 05:26:36,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 385.7ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:26:36,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115835 states. [2021-06-05 05:26:38,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115835 to 56994. [2021-06-05 05:26:38,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56994 states, 56993 states have (on average 4.487621286824698) internal successors, (255763), 56993 states have internal predecessors, (255763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56994 states to 56994 states and 255763 transitions. [2021-06-05 05:26:39,126 INFO L78 Accepts]: Start accepts. Automaton has 56994 states and 255763 transitions. Word has length 36 [2021-06-05 05:26:39,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:39,126 INFO L482 AbstractCegarLoop]: Abstraction has 56994 states and 255763 transitions. [2021-06-05 05:26:39,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:39,127 INFO L276 IsEmpty]: Start isEmpty. Operand 56994 states and 255763 transitions. [2021-06-05 05:26:39,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:26:39,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:39,266 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2021-06-05 05:26:39,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 05:26:39,467 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:39,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:39,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2101133940, now seen corresponding path program 15 times [2021-06-05 05:26:39,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:39,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747629159] [2021-06-05 05:26:39,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:39,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:39,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747629159] [2021-06-05 05:26:39,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747629159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:39,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534100153] [2021-06-05 05:26:39,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:39,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:26:39,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:39,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:26:39,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:39,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534100153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:39,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:39,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 05:26:39,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402792390] [2021-06-05 05:26:39,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:26:39,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:39,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:26:39,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:26:39,720 INFO L87 Difference]: Start difference. First operand 56994 states and 255763 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:40,165 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2021-06-05 05:26:42,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:42,014 INFO L93 Difference]: Finished difference Result 148781 states and 646238 transitions. [2021-06-05 05:26:42,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:26:42,014 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:26:42,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:42,576 INFO L225 Difference]: With dead ends: 148781 [2021-06-05 05:26:42,576 INFO L226 Difference]: Without dead ends: 147463 [2021-06-05 05:26:42,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 945.6ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:26:42,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147463 states. [2021-06-05 05:26:45,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147463 to 80557. [2021-06-05 05:26:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80557 states, 80556 states have (on average 4.52723571180297) internal successors, (364696), 80556 states have internal predecessors, (364696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80557 states to 80557 states and 364696 transitions. [2021-06-05 05:26:46,453 INFO L78 Accepts]: Start accepts. Automaton has 80557 states and 364696 transitions. Word has length 36 [2021-06-05 05:26:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:46,453 INFO L482 AbstractCegarLoop]: Abstraction has 80557 states and 364696 transitions. [2021-06-05 05:26:46,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:46,453 INFO L276 IsEmpty]: Start isEmpty. Operand 80557 states and 364696 transitions. [2021-06-05 05:26:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:26:46,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:46,624 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2021-06-05 05:26:46,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:46,824 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:46,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:46,825 INFO L82 PathProgramCache]: Analyzing trace with hash -8737100, now seen corresponding path program 16 times [2021-06-05 05:26:46,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:46,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151119349] [2021-06-05 05:26:46,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:46,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:46,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151119349] [2021-06-05 05:26:46,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151119349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:46,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952726723] [2021-06-05 05:26:46,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:46,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:26:46,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:46,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:26:46,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:47,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952726723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:47,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:47,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 05:26:47,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409996320] [2021-06-05 05:26:47,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:26:47,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:47,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:26:47,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:26:47,071 INFO L87 Difference]: Start difference. First operand 80557 states and 364696 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:48,920 INFO L93 Difference]: Finished difference Result 170107 states and 749961 transitions. [2021-06-05 05:26:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:26:48,921 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:26:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:50,075 INFO L225 Difference]: With dead ends: 170107 [2021-06-05 05:26:50,075 INFO L226 Difference]: Without dead ends: 170087 [2021-06-05 05:26:50,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 410.3ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:26:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170087 states. [2021-06-05 05:26:53,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170087 to 102149. [2021-06-05 05:26:54,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102149 states, 102148 states have (on average 4.5491933273289735) internal successors, (464691), 102148 states have internal predecessors, (464691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102149 states to 102149 states and 464691 transitions. [2021-06-05 05:26:54,721 INFO L78 Accepts]: Start accepts. Automaton has 102149 states and 464691 transitions. Word has length 36 [2021-06-05 05:26:54,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:54,721 INFO L482 AbstractCegarLoop]: Abstraction has 102149 states and 464691 transitions. [2021-06-05 05:26:54,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:54,721 INFO L276 IsEmpty]: Start isEmpty. Operand 102149 states and 464691 transitions. [2021-06-05 05:26:54,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:26:54,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:54,897 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2021-06-05 05:26:55,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 05:26:55,108 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:55,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:55,109 INFO L82 PathProgramCache]: Analyzing trace with hash 639165552, now seen corresponding path program 17 times [2021-06-05 05:26:55,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:55,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966056417] [2021-06-05 05:26:55,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:55,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:55,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966056417] [2021-06-05 05:26:55,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966056417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:55,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184499302] [2021-06-05 05:26:55,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:55,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:26:55,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:55,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:26:55,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:55,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184499302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:55,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:55,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 05:26:55,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720694760] [2021-06-05 05:26:55,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:26:55,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:55,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:26:55,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:26:55,323 INFO L87 Difference]: Start difference. First operand 102149 states and 464691 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:57,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:57,179 INFO L93 Difference]: Finished difference Result 140554 states and 618093 transitions. [2021-06-05 05:26:57,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:26:57,180 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:26:57,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:57,689 INFO L225 Difference]: With dead ends: 140554 [2021-06-05 05:26:57,689 INFO L226 Difference]: Without dead ends: 140250 [2021-06-05 05:26:57,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 401.8ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:26:58,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140250 states. [2021-06-05 05:27:01,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140250 to 98725. [2021-06-05 05:27:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98725 states, 98724 states have (on average 4.555366476236781) internal successors, (449724), 98724 states have internal predecessors, (449724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:01,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98725 states to 98725 states and 449724 transitions. [2021-06-05 05:27:01,719 INFO L78 Accepts]: Start accepts. Automaton has 98725 states and 449724 transitions. Word has length 36 [2021-06-05 05:27:01,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:27:01,719 INFO L482 AbstractCegarLoop]: Abstraction has 98725 states and 449724 transitions. [2021-06-05 05:27:01,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:01,720 INFO L276 IsEmpty]: Start isEmpty. Operand 98725 states and 449724 transitions. [2021-06-05 05:27:01,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:27:01,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:27:01,891 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2021-06-05 05:27:02,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 05:27:02,092 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:27:02,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:27:02,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1378983634, now seen corresponding path program 18 times [2021-06-05 05:27:02,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:27:02,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786823555] [2021-06-05 05:27:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:27:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:27:02,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:27:02,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786823555] [2021-06-05 05:27:02,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786823555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:02,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889005287] [2021-06-05 05:27:02,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:27:02,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:27:02,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:27:02,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:27:02,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:27:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:02,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889005287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:02,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:27:02,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 05:27:02,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610028638] [2021-06-05 05:27:02,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:27:02,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:27:02,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:27:02,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:27:02,310 INFO L87 Difference]: Start difference. First operand 98725 states and 449724 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:04,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:27:04,056 INFO L93 Difference]: Finished difference Result 157433 states and 697584 transitions. [2021-06-05 05:27:04,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:27:04,057 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:27:04,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:27:05,231 INFO L225 Difference]: With dead ends: 157433 [2021-06-05 05:27:05,231 INFO L226 Difference]: Without dead ends: 156538 [2021-06-05 05:27:05,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 304.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:27:05,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156538 states. [2021-06-05 05:27:08,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156538 to 110101. [2021-06-05 05:27:08,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110101 states, 110100 states have (on average 4.5832970027247955) internal successors, (504621), 110100 states have internal predecessors, (504621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110101 states to 110101 states and 504621 transitions. [2021-06-05 05:27:09,879 INFO L78 Accepts]: Start accepts. Automaton has 110101 states and 504621 transitions. Word has length 36 [2021-06-05 05:27:09,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:27:09,879 INFO L482 AbstractCegarLoop]: Abstraction has 110101 states and 504621 transitions. [2021-06-05 05:27:09,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 110101 states and 504621 transitions. [2021-06-05 05:27:10,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:27:10,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:27:10,084 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2021-06-05 05:27:10,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 05:27:10,289 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:27:10,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:27:10,289 INFO L82 PathProgramCache]: Analyzing trace with hash 421465332, now seen corresponding path program 19 times [2021-06-05 05:27:10,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:27:10,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896983540] [2021-06-05 05:27:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:27:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:10,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:27:10,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896983540] [2021-06-05 05:27:10,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896983540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:10,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349532442] [2021-06-05 05:27:10,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:27:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:10,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:27:10,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:27:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:10,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349532442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:10,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:27:10,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 05:27:10,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115193734] [2021-06-05 05:27:10,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:27:10,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:27:10,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:27:10,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:27:10,517 INFO L87 Difference]: Start difference. First operand 110101 states and 504621 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:12,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:27:12,605 INFO L93 Difference]: Finished difference Result 192417 states and 850027 transitions. [2021-06-05 05:27:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:27:12,605 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:27:12,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:27:13,304 INFO L225 Difference]: With dead ends: 192417 [2021-06-05 05:27:13,304 INFO L226 Difference]: Without dead ends: 191725 [2021-06-05 05:27:13,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 424.7ms TimeCoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:27:14,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191725 states. [2021-06-05 05:27:17,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191725 to 118442. [2021-06-05 05:27:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118442 states, 118441 states have (on average 4.604208002296502) internal successors, (545327), 118441 states have internal predecessors, (545327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:18,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118442 states to 118442 states and 545327 transitions. [2021-06-05 05:27:18,747 INFO L78 Accepts]: Start accepts. Automaton has 118442 states and 545327 transitions. Word has length 36 [2021-06-05 05:27:18,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:27:18,747 INFO L482 AbstractCegarLoop]: Abstraction has 118442 states and 545327 transitions. [2021-06-05 05:27:18,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:18,747 INFO L276 IsEmpty]: Start isEmpty. Operand 118442 states and 545327 transitions. [2021-06-05 05:27:18,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:27:18,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:27:18,936 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2021-06-05 05:27:19,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 05:27:19,137 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:27:19,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:27:19,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1506818294, now seen corresponding path program 20 times [2021-06-05 05:27:19,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:27:19,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236508690] [2021-06-05 05:27:19,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:27:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:27:19,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:27:19,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236508690] [2021-06-05 05:27:19,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236508690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:19,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364742341] [2021-06-05 05:27:19,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:27:19,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:27:19,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:27:19,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:27:19,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:27:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:19,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364742341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:19,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:27:19,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 05:27:19,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644256425] [2021-06-05 05:27:19,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:27:19,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:27:19,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:27:19,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:27:19,362 INFO L87 Difference]: Start difference. First operand 118442 states and 545327 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:22,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:27:22,151 INFO L93 Difference]: Finished difference Result 221192 states and 968042 transitions. [2021-06-05 05:27:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:27:22,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:27:22,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:27:23,208 INFO L225 Difference]: With dead ends: 221192 [2021-06-05 05:27:23,208 INFO L226 Difference]: Without dead ends: 221192 [2021-06-05 05:27:23,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 375.5ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:27:23,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221192 states. [2021-06-05 05:27:27,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221192 to 115584. [2021-06-05 05:27:28,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115584 states, 115583 states have (on average 4.562331830805569) internal successors, (527328), 115583 states have internal predecessors, (527328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115584 states to 115584 states and 527328 transitions. [2021-06-05 05:27:28,611 INFO L78 Accepts]: Start accepts. Automaton has 115584 states and 527328 transitions. Word has length 36 [2021-06-05 05:27:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:27:28,611 INFO L482 AbstractCegarLoop]: Abstraction has 115584 states and 527328 transitions. [2021-06-05 05:27:28,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:28,611 INFO L276 IsEmpty]: Start isEmpty. Operand 115584 states and 527328 transitions. [2021-06-05 05:27:29,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:27:29,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:27:29,572 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2021-06-05 05:27:29,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 05:27:29,773 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:27:29,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:27:29,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2125183306, now seen corresponding path program 21 times [2021-06-05 05:27:29,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:27:29,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841943272] [2021-06-05 05:27:29,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:27:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:27:29,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:27:29,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841943272] [2021-06-05 05:27:29,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841943272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:29,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715244977] [2021-06-05 05:27:29,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:27:29,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:27:29,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:27:29,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:27:29,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:27:30,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:30,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715244977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:30,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:27:30,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 05:27:30,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108265089] [2021-06-05 05:27:30,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:27:30,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:27:30,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:27:30,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:27:30,005 INFO L87 Difference]: Start difference. First operand 115584 states and 527328 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:31,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:27:31,898 INFO L93 Difference]: Finished difference Result 149434 states and 659887 transitions. [2021-06-05 05:27:31,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:27:31,899 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:27:31,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:27:32,923 INFO L225 Difference]: With dead ends: 149434 [2021-06-05 05:27:32,923 INFO L226 Difference]: Without dead ends: 149030 [2021-06-05 05:27:32,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:27:33,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149030 states. [2021-06-05 05:27:36,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149030 to 114434. [2021-06-05 05:27:36,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114434 states, 114433 states have (on average 4.564548687878497) internal successors, (522335), 114433 states have internal predecessors, (522335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114434 states to 114434 states and 522335 transitions. [2021-06-05 05:27:38,125 INFO L78 Accepts]: Start accepts. Automaton has 114434 states and 522335 transitions. Word has length 36 [2021-06-05 05:27:38,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:27:38,125 INFO L482 AbstractCegarLoop]: Abstraction has 114434 states and 522335 transitions. [2021-06-05 05:27:38,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 114434 states and 522335 transitions. [2021-06-05 05:27:38,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:27:38,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:27:38,492 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2021-06-05 05:27:38,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:27:38,705 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:27:38,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:27:38,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1698176276, now seen corresponding path program 22 times [2021-06-05 05:27:38,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:27:38,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842285018] [2021-06-05 05:27:38,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:27:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:27:38,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:27:38,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842285018] [2021-06-05 05:27:38,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842285018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:38,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37784992] [2021-06-05 05:27:38,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:27:38,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:27:38,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:27:38,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:27:38,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:27:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:38,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37784992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:38,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:27:38,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 05:27:38,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802535311] [2021-06-05 05:27:38,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:27:38,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:27:38,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:27:38,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:27:38,957 INFO L87 Difference]: Start difference. First operand 114434 states and 522335 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:27:41,477 INFO L93 Difference]: Finished difference Result 262218 states and 1170693 transitions. [2021-06-05 05:27:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:27:41,477 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:27:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:27:43,230 INFO L225 Difference]: With dead ends: 262218 [2021-06-05 05:27:43,230 INFO L226 Difference]: Without dead ends: 262218 [2021-06-05 05:27:43,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 447.3ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:27:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262218 states. [2021-06-05 05:27:49,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262218 to 187390. [2021-06-05 05:27:49,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187390 states, 187389 states have (on average 4.617053295550966) internal successors, (865185), 187389 states have internal predecessors, (865185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187390 states to 187390 states and 865185 transitions. [2021-06-05 05:27:51,617 INFO L78 Accepts]: Start accepts. Automaton has 187390 states and 865185 transitions. Word has length 36 [2021-06-05 05:27:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:27:51,617 INFO L482 AbstractCegarLoop]: Abstraction has 187390 states and 865185 transitions. [2021-06-05 05:27:51,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:51,618 INFO L276 IsEmpty]: Start isEmpty. Operand 187390 states and 865185 transitions. [2021-06-05 05:27:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:27:51,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:27:51,944 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2021-06-05 05:27:52,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 05:27:52,146 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:27:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:27:52,146 INFO L82 PathProgramCache]: Analyzing trace with hash -52256758, now seen corresponding path program 23 times [2021-06-05 05:27:52,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:27:52,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569284303] [2021-06-05 05:27:52,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:27:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:27:52,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:27:52,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569284303] [2021-06-05 05:27:52,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569284303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:52,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284989596] [2021-06-05 05:27:52,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:27:52,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:27:52,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:27:52,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:27:52,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:27:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:52,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284989596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:52,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:27:52,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 05:27:52,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748541544] [2021-06-05 05:27:52,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:27:52,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:27:52,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:27:52,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:27:52,340 INFO L87 Difference]: Start difference. First operand 187390 states and 865185 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:27:55,545 INFO L93 Difference]: Finished difference Result 254683 states and 1137807 transitions. [2021-06-05 05:27:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:27:55,546 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:27:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:27:56,723 INFO L225 Difference]: With dead ends: 254683 [2021-06-05 05:27:56,723 INFO L226 Difference]: Without dead ends: 254373 [2021-06-05 05:27:56,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:27:57,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254373 states. [2021-06-05 05:28:03,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254373 to 187000. [2021-06-05 05:28:03,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187000 states, 186999 states have (on average 4.611853539323739) internal successors, (862412), 186999 states have internal predecessors, (862412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:05,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187000 states to 187000 states and 862412 transitions. [2021-06-05 05:28:05,091 INFO L78 Accepts]: Start accepts. Automaton has 187000 states and 862412 transitions. Word has length 36 [2021-06-05 05:28:05,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:28:05,092 INFO L482 AbstractCegarLoop]: Abstraction has 187000 states and 862412 transitions. [2021-06-05 05:28:05,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:05,092 INFO L276 IsEmpty]: Start isEmpty. Operand 187000 states and 862412 transitions. [2021-06-05 05:28:05,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:28:05,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:28:05,402 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2021-06-05 05:28:05,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:28:05,603 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:28:05,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:28:05,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1154614392, now seen corresponding path program 24 times [2021-06-05 05:28:05,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:28:05,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764956924] [2021-06-05 05:28:05,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:28:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:28:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:28:05,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:28:05,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764956924] [2021-06-05 05:28:05,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764956924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:28:05,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255368554] [2021-06-05 05:28:05,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:28:05,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:28:05,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:28:05,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:28:05,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:28:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:28:05,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255368554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:28:05,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:28:05,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 05:28:05,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645957159] [2021-06-05 05:28:05,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:28:05,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:28:05,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:28:05,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:28:05,801 INFO L87 Difference]: Start difference. First operand 187000 states and 862412 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:09,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:28:09,357 INFO L93 Difference]: Finished difference Result 283294 states and 1263502 transitions. [2021-06-05 05:28:09,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:28:09,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:28:09,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:28:10,486 INFO L225 Difference]: With dead ends: 283294 [2021-06-05 05:28:10,486 INFO L226 Difference]: Without dead ends: 282784 [2021-06-05 05:28:10,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 427.6ms TimeCoverageRelationStatistics Valid=404, Invalid=1078, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:28:11,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282784 states. [2021-06-05 05:28:17,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282784 to 207055. [2021-06-05 05:28:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207055 states, 207054 states have (on average 4.6254455359471445) internal successors, (957717), 207054 states have internal predecessors, (957717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:19,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207055 states to 207055 states and 957717 transitions. [2021-06-05 05:28:19,914 INFO L78 Accepts]: Start accepts. Automaton has 207055 states and 957717 transitions. Word has length 36 [2021-06-05 05:28:19,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:28:19,915 INFO L482 AbstractCegarLoop]: Abstraction has 207055 states and 957717 transitions. [2021-06-05 05:28:19,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:19,915 INFO L276 IsEmpty]: Start isEmpty. Operand 207055 states and 957717 transitions. [2021-06-05 05:28:20,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:28:20,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:28:20,239 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2021-06-05 05:28:20,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 05:28:20,440 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:28:20,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:28:20,440 INFO L82 PathProgramCache]: Analyzing trace with hash 333714932, now seen corresponding path program 25 times [2021-06-05 05:28:20,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:28:20,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657739368] [2021-06-05 05:28:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:28:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:28:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:28:20,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:28:20,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657739368] [2021-06-05 05:28:20,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657739368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:28:20,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092561283] [2021-06-05 05:28:20,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:28:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:28:20,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:28:20,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:28:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:28:20,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092561283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:28:20,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:28:20,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 05:28:20,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044521848] [2021-06-05 05:28:20,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:28:20,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:28:20,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:28:20,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:28:20,683 INFO L87 Difference]: Start difference. First operand 207055 states and 957717 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:24,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:28:24,278 INFO L93 Difference]: Finished difference Result 290122 states and 1295399 transitions. [2021-06-05 05:28:24,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:28:24,279 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:28:24,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:28:25,509 INFO L225 Difference]: With dead ends: 290122 [2021-06-05 05:28:25,509 INFO L226 Difference]: Without dead ends: 289652 [2021-06-05 05:28:25,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 518.4ms TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:28:26,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289652 states. [2021-06-05 05:28:32,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289652 to 218816. [2021-06-05 05:28:32,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218816 states, 218815 states have (on average 4.624737792198889) internal successors, (1011962), 218815 states have internal predecessors, (1011962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:35,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218816 states to 218816 states and 1011962 transitions. [2021-06-05 05:28:35,318 INFO L78 Accepts]: Start accepts. Automaton has 218816 states and 1011962 transitions. Word has length 36 [2021-06-05 05:28:35,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:28:35,318 INFO L482 AbstractCegarLoop]: Abstraction has 218816 states and 1011962 transitions. [2021-06-05 05:28:35,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:35,318 INFO L276 IsEmpty]: Start isEmpty. Operand 218816 states and 1011962 transitions. [2021-06-05 05:28:35,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 05:28:35,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:28:35,883 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:28:36,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 05:28:36,101 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:28:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:28:36,101 INFO L82 PathProgramCache]: Analyzing trace with hash 699829746, now seen corresponding path program 26 times [2021-06-05 05:28:36,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:28:36,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249507192] [2021-06-05 05:28:36,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:28:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:28:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:28:36,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:28:36,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249507192] [2021-06-05 05:28:36,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249507192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:28:36,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949194434] [2021-06-05 05:28:36,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:28:36,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:28:36,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:28:36,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:28:36,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:28:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:28:36,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949194434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:28:36,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:28:36,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-06-05 05:28:36,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410639415] [2021-06-05 05:28:36,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:28:36,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:28:36,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:28:36,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:28:36,454 INFO L87 Difference]: Start difference. First operand 218816 states and 1011962 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:40,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:28:40,443 INFO L93 Difference]: Finished difference Result 275767 states and 1260077 transitions. [2021-06-05 05:28:40,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:28:40,444 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 05:28:40,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:28:42,579 INFO L225 Difference]: With dead ends: 275767 [2021-06-05 05:28:42,579 INFO L226 Difference]: Without dead ends: 274998 [2021-06-05 05:28:42,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:28:43,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274998 states. [2021-06-05 05:28:50,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274998 to 238003. [2021-06-05 05:28:50,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238003 states, 238002 states have (on average 4.6232090486634565) internal successors, (1100333), 238002 states have internal predecessors, (1100333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238003 states to 238003 states and 1100333 transitions. [2021-06-05 05:28:52,633 INFO L78 Accepts]: Start accepts. Automaton has 238003 states and 1100333 transitions. Word has length 38 [2021-06-05 05:28:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:28:52,633 INFO L482 AbstractCegarLoop]: Abstraction has 238003 states and 1100333 transitions. [2021-06-05 05:28:52,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:52,633 INFO L276 IsEmpty]: Start isEmpty. Operand 238003 states and 1100333 transitions. [2021-06-05 05:28:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 05:28:53,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:28:53,050 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:28:53,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 05:28:53,250 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:28:53,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:28:53,251 INFO L82 PathProgramCache]: Analyzing trace with hash -741519670, now seen corresponding path program 27 times [2021-06-05 05:28:53,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:28:53,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890992733] [2021-06-05 05:28:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:28:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:28:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:28:53,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:28:53,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890992733] [2021-06-05 05:28:53,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890992733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:28:53,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801936120] [2021-06-05 05:28:53,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:28:53,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:28:53,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:28:53,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:28:53,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:28:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:28:53,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801936120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:28:53,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:28:53,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-06-05 05:28:53,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843713832] [2021-06-05 05:28:53,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:28:53,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:28:53,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:28:53,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:28:53,471 INFO L87 Difference]: Start difference. First operand 238003 states and 1100333 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:58,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:28:58,088 INFO L93 Difference]: Finished difference Result 394201 states and 1792824 transitions. [2021-06-05 05:28:58,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:28:58,101 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 05:28:58,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:28:59,854 INFO L225 Difference]: With dead ends: 394201 [2021-06-05 05:28:59,854 INFO L226 Difference]: Without dead ends: 392734 [2021-06-05 05:28:59,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:29:01,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392734 states. [2021-06-05 05:29:10,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392734 to 306278. [2021-06-05 05:29:11,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306278 states, 306277 states have (on average 4.624082121739471) internal successors, (1416250), 306277 states have internal predecessors, (1416250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:14,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306278 states to 306278 states and 1416250 transitions. [2021-06-05 05:29:14,550 INFO L78 Accepts]: Start accepts. Automaton has 306278 states and 1416250 transitions. Word has length 38 [2021-06-05 05:29:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:29:14,550 INFO L482 AbstractCegarLoop]: Abstraction has 306278 states and 1416250 transitions. [2021-06-05 05:29:14,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:14,550 INFO L276 IsEmpty]: Start isEmpty. Operand 306278 states and 1416250 transitions. [2021-06-05 05:29:15,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 05:29:15,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:29:15,228 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:29:15,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 05:29:15,429 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:29:15,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:29:15,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1495021836, now seen corresponding path program 1 times [2021-06-05 05:29:15,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:29:15,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795139799] [2021-06-05 05:29:15,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:29:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:29:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:29:15,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:29:15,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795139799] [2021-06-05 05:29:15,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795139799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:29:15,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596547799] [2021-06-05 05:29:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:29:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:29:15,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:29:15,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:29:15,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:29:15,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596547799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:29:15,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:29:15,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-06-05 05:29:15,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601470100] [2021-06-05 05:29:15,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:29:15,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:29:15,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:29:15,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:29:15,667 INFO L87 Difference]: Start difference. First operand 306278 states and 1416250 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:29:22,883 INFO L93 Difference]: Finished difference Result 586179 states and 2672233 transitions. [2021-06-05 05:29:22,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:29:22,884 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 05:29:22,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:29:28,342 INFO L225 Difference]: With dead ends: 586179 [2021-06-05 05:29:28,342 INFO L226 Difference]: Without dead ends: 583951 [2021-06-05 05:29:28,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:29:29,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583951 states. [2021-06-05 05:29:44,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583951 to 425975. [2021-06-05 05:29:45,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425975 states, 425974 states have (on average 4.631465770211327) internal successors, (1972884), 425974 states have internal predecessors, (1972884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425975 states to 425975 states and 1972884 transitions. [2021-06-05 05:29:48,684 INFO L78 Accepts]: Start accepts. Automaton has 425975 states and 1972884 transitions. Word has length 38 [2021-06-05 05:29:48,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:29:48,684 INFO L482 AbstractCegarLoop]: Abstraction has 425975 states and 1972884 transitions. [2021-06-05 05:29:48,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:48,684 INFO L276 IsEmpty]: Start isEmpty. Operand 425975 states and 1972884 transitions. [2021-06-05 05:29:50,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 05:29:50,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:29:50,307 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:29:50,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 05:29:50,521 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:29:50,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:29:50,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1674170670, now seen corresponding path program 28 times [2021-06-05 05:29:50,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:29:50,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068157904] [2021-06-05 05:29:50,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:29:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:29:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:29:50,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:29:50,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068157904] [2021-06-05 05:29:50,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068157904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:29:50,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502731180] [2021-06-05 05:29:50,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:29:50,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:29:50,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:29:50,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:29:50,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:29:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:29:50,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502731180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:29:50,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:29:50,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-06-05 05:29:50,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727251984] [2021-06-05 05:29:50,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:29:50,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:29:50,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:29:50,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:29:50,765 INFO L87 Difference]: Start difference. First operand 425975 states and 1972884 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:56,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:29:56,582 INFO L93 Difference]: Finished difference Result 560533 states and 2590081 transitions. [2021-06-05 05:29:56,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:29:56,583 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 05:29:56,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:00,177 INFO L225 Difference]: With dead ends: 560533 [2021-06-05 05:30:00,178 INFO L226 Difference]: Without dead ends: 559708 [2021-06-05 05:30:00,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:30:00,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559708 states. [2021-06-05 05:30:19,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559708 to 545995. [2021-06-05 05:30:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545995 states, 545994 states have (on average 4.646322120755905) internal successors, (2536864), 545994 states have internal predecessors, (2536864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:27,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545995 states to 545995 states and 2536864 transitions. [2021-06-05 05:30:27,744 INFO L78 Accepts]: Start accepts. Automaton has 545995 states and 2536864 transitions. Word has length 38 [2021-06-05 05:30:27,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:27,745 INFO L482 AbstractCegarLoop]: Abstraction has 545995 states and 2536864 transitions. [2021-06-05 05:30:27,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:27,745 INFO L276 IsEmpty]: Start isEmpty. Operand 545995 states and 2536864 transitions. [2021-06-05 05:30:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:30:30,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:30,723 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2021-06-05 05:30:30,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:30:30,942 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:30,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:30,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1628737040, now seen corresponding path program 29 times [2021-06-05 05:30:30,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:30,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863045317] [2021-06-05 05:30:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:31,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:31,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863045317] [2021-06-05 05:30:31,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863045317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:31,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855108598] [2021-06-05 05:30:31,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:30:31,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:30:31,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:31,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:30:31,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:31,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855108598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:31,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:31,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 05:30:31,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791868856] [2021-06-05 05:30:31,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:30:31,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:31,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:30:31,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:30:31,405 INFO L87 Difference]: Start difference. First operand 545995 states and 2536864 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:44,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:44,356 INFO L93 Difference]: Finished difference Result 810316 states and 3662784 transitions. [2021-06-05 05:30:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:30:44,357 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:30:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:51,658 INFO L225 Difference]: With dead ends: 810316 [2021-06-05 05:30:51,658 INFO L226 Difference]: Without dead ends: 810316 [2021-06-05 05:30:51,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 772.7ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:30:54,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810316 states. [2021-06-05 05:31:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810316 to 534782. [2021-06-05 05:31:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534782 states, 534781 states have (on average 4.638676392766385) internal successors, (2480676), 534781 states have internal predecessors, (2480676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534782 states to 534782 states and 2480676 transitions. [2021-06-05 05:31:24,150 INFO L78 Accepts]: Start accepts. Automaton has 534782 states and 2480676 transitions. Word has length 40 [2021-06-05 05:31:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:24,151 INFO L482 AbstractCegarLoop]: Abstraction has 534782 states and 2480676 transitions. [2021-06-05 05:31:24,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:24,151 INFO L276 IsEmpty]: Start isEmpty. Operand 534782 states and 2480676 transitions. [2021-06-05 05:31:25,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:31:25,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:25,299 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2021-06-05 05:31:25,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 05:31:25,500 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:25,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:25,500 INFO L82 PathProgramCache]: Analyzing trace with hash -804307532, now seen corresponding path program 30 times [2021-06-05 05:31:25,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:25,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214822636] [2021-06-05 05:31:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:26,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:26,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214822636] [2021-06-05 05:31:26,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214822636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:26,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077588917] [2021-06-05 05:31:26,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:31:26,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:31:26,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:31:26,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:31:26,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:26,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077588917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:26,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:26,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:31:26,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121946848] [2021-06-05 05:31:26,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:31:26,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:26,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:31:26,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:31:26,571 INFO L87 Difference]: Start difference. First operand 534782 states and 2480676 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:43,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:43,118 INFO L93 Difference]: Finished difference Result 1136355 states and 5157666 transitions. [2021-06-05 05:31:43,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:31:43,118 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:31:43,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:49,925 INFO L225 Difference]: With dead ends: 1136355 [2021-06-05 05:31:49,926 INFO L226 Difference]: Without dead ends: 1133906 [2021-06-05 05:31:49,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 1932.6ms TimeCoverageRelationStatistics Valid=1280, Invalid=3976, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:31:52,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133906 states. [2021-06-05 05:32:32,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133906 to 706666. [2021-06-05 05:32:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706666 states, 706665 states have (on average 4.660015707584216) internal successors, (3293070), 706665 states have internal predecessors, (3293070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:43,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706666 states to 706666 states and 3293070 transitions. [2021-06-05 05:32:43,925 INFO L78 Accepts]: Start accepts. Automaton has 706666 states and 3293070 transitions. Word has length 40 [2021-06-05 05:32:43,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:43,925 INFO L482 AbstractCegarLoop]: Abstraction has 706666 states and 3293070 transitions. [2021-06-05 05:32:43,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:43,926 INFO L276 IsEmpty]: Start isEmpty. Operand 706666 states and 3293070 transitions. [2021-06-05 05:32:46,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:32:46,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:46,643 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2021-06-05 05:32:46,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 05:32:46,857 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:46,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:46,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1830337484, now seen corresponding path program 31 times [2021-06-05 05:32:46,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:46,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700331101] [2021-06-05 05:32:46,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:46,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:46,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700331101] [2021-06-05 05:32:46,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700331101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:46,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114370395] [2021-06-05 05:32:46,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:32:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:47,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:32:47,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:47,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114370395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:47,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:47,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 05:32:47,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524238881] [2021-06-05 05:32:47,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:32:47,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:47,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:32:47,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:32:47,275 INFO L87 Difference]: Start difference. First operand 706666 states and 3293070 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:48,393 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12