/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:19:04,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:19:04,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:19:04,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 21:19:04,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 21:19:04,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 21:19:04,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 21:19:04,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 21:19:04,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 21:19:04,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 21:19:04,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 21:19:04,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 21:19:04,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:19:04,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:19:04,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:19:04,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:19:04,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:19:04,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:19:04,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:19:04,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:19:04,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:19:04,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:19:04,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:19:04,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:19:04,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:19:04,679 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 21:19:04,715 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:19:04,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:19:04,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:19:04,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:19:04,717 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:19:04,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:19:04,721 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:19:04,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:19:04,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:19:04,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:19:04,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:19:04,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:19:04,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:19:04,722 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:19:04,722 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:19:04,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:19:04,723 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:19:04,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:19:04,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:19:04,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:19:04,723 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:19:04,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:19:04,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:19:04,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:19:04,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:19:04,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:19:04,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:19:04,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:19:04,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:19:04,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:19:05,028 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:19:05,049 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:19:05,055 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:19:05,056 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:19:05,057 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:19:05,057 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label32.c [2019-11-23 21:19:05,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64df6c654/88afe91a1cd0476a8f3f91168694e22a/FLAGf7111cb1d [2019-11-23 21:19:05,776 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:19:05,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label32.c [2019-11-23 21:19:05,795 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64df6c654/88afe91a1cd0476a8f3f91168694e22a/FLAGf7111cb1d [2019-11-23 21:19:05,975 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64df6c654/88afe91a1cd0476a8f3f91168694e22a [2019-11-23 21:19:05,983 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:19:05,985 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:19:05,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:19:05,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:19:05,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:19:05,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:05" (1/1) ... [2019-11-23 21:19:05,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc62c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:05, skipping insertion in model container [2019-11-23 21:19:05,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:05" (1/1) ... [2019-11-23 21:19:06,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:19:06,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:19:06,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:19:06,940 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:19:07,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:19:07,568 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:19:07,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:07 WrapperNode [2019-11-23 21:19:07,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:19:07,570 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:19:07,570 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:19:07,570 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:19:07,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:07" (1/1) ... [2019-11-23 21:19:07,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:07" (1/1) ... [2019-11-23 21:19:07,780 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:19:07,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:19:07,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:19:07,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:19:07,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:07" (1/1) ... [2019-11-23 21:19:07,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:07" (1/1) ... [2019-11-23 21:19:07,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:07" (1/1) ... [2019-11-23 21:19:07,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:07" (1/1) ... [2019-11-23 21:19:07,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:07" (1/1) ... [2019-11-23 21:19:07,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:07" (1/1) ... [2019-11-23 21:19:07,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:07" (1/1) ... [2019-11-23 21:19:08,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:19:08,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:19:08,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:19:08,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:19:08,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:07" (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 [2019-11-23 21:19:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:19:08,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:19:10,487 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:19:10,487 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 21:19:10,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:10 BoogieIcfgContainer [2019-11-23 21:19:10,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:19:10,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:19:10,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:19:10,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:19:10,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:19:05" (1/3) ... [2019-11-23 21:19:10,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7da72a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:10, skipping insertion in model container [2019-11-23 21:19:10,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:07" (2/3) ... [2019-11-23 21:19:10,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7da72a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:10, skipping insertion in model container [2019-11-23 21:19:10,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:10" (3/3) ... [2019-11-23 21:19:10,499 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label32.c [2019-11-23 21:19:10,509 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:19:10,516 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:19:10,527 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:19:10,555 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:19:10,555 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:19:10,556 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:19:10,556 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:19:10,556 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:19:10,556 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:19:10,556 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:19:10,556 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:19:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states. [2019-11-23 21:19:10,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 21:19:10,589 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:10,590 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:10,590 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:10,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:10,595 INFO L82 PathProgramCache]: Analyzing trace with hash 563919826, now seen corresponding path program 1 times [2019-11-23 21:19:10,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:10,605 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486746448] [2019-11-23 21:19:10,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:19:10,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486746448] [2019-11-23 21:19:10,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:10,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:19:10,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853511403] [2019-11-23 21:19:10,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:19:10,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:10,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:19:10,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:10,927 INFO L87 Difference]: Start difference. First operand 396 states. Second operand 4 states. [2019-11-23 21:19:14,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:14,246 INFO L93 Difference]: Finished difference Result 1454 states and 2762 transitions. [2019-11-23 21:19:14,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:19:14,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2019-11-23 21:19:14,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:14,271 INFO L225 Difference]: With dead ends: 1454 [2019-11-23 21:19:14,272 INFO L226 Difference]: Without dead ends: 991 [2019-11-23 21:19:14,277 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2019-11-23 21:19:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2019-11-23 21:19:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 991 states. [2019-11-23 21:19:14,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1567 transitions. [2019-11-23 21:19:14,382 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1567 transitions. Word has length 48 [2019-11-23 21:19:14,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:14,383 INFO L462 AbstractCegarLoop]: Abstraction has 991 states and 1567 transitions. [2019-11-23 21:19:14,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:19:14,383 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1567 transitions. [2019-11-23 21:19:14,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-23 21:19:14,392 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:14,393 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:14,394 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:14,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:14,394 INFO L82 PathProgramCache]: Analyzing trace with hash 524059219, now seen corresponding path program 1 times [2019-11-23 21:19:14,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:14,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427232128] [2019-11-23 21:19:14,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:19:15,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427232128] [2019-11-23 21:19:15,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:15,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:19:15,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100133980] [2019-11-23 21:19:15,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 21:19:15,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:15,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 21:19:15,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:19:15,035 INFO L87 Difference]: Start difference. First operand 991 states and 1567 transitions. Second operand 7 states. [2019-11-23 21:19:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:18,333 INFO L93 Difference]: Finished difference Result 2320 states and 3550 transitions. [2019-11-23 21:19:18,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:19:18,336 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 179 [2019-11-23 21:19:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:18,344 INFO L225 Difference]: With dead ends: 2320 [2019-11-23 21:19:18,344 INFO L226 Difference]: Without dead ends: 1331 [2019-11-23 21:19:18,348 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:19:18,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2019-11-23 21:19:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1320. [2019-11-23 21:19:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2019-11-23 21:19:18,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1902 transitions. [2019-11-23 21:19:18,386 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1902 transitions. Word has length 179 [2019-11-23 21:19:18,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:18,387 INFO L462 AbstractCegarLoop]: Abstraction has 1320 states and 1902 transitions. [2019-11-23 21:19:18,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 21:19:18,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1902 transitions. [2019-11-23 21:19:18,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2019-11-23 21:19:18,395 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:18,396 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:18,396 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:18,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:18,397 INFO L82 PathProgramCache]: Analyzing trace with hash -535832572, now seen corresponding path program 1 times [2019-11-23 21:19:18,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:18,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199678959] [2019-11-23 21:19:18,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:19:18,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199678959] [2019-11-23 21:19:18,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:18,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:19:18,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509699740] [2019-11-23 21:19:18,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:19:18,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:18,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:19:18,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:19:18,681 INFO L87 Difference]: Start difference. First operand 1320 states and 1902 transitions. Second operand 3 states. [2019-11-23 21:19:20,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:20,401 INFO L93 Difference]: Finished difference Result 3296 states and 5031 transitions. [2019-11-23 21:19:20,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:19:20,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 266 [2019-11-23 21:19:20,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:20,414 INFO L225 Difference]: With dead ends: 3296 [2019-11-23 21:19:20,414 INFO L226 Difference]: Without dead ends: 2307 [2019-11-23 21:19:20,416 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:19:20,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2019-11-23 21:19:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2307. [2019-11-23 21:19:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2307 states. [2019-11-23 21:19:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 3033 transitions. [2019-11-23 21:19:20,464 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 3033 transitions. Word has length 266 [2019-11-23 21:19:20,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:20,465 INFO L462 AbstractCegarLoop]: Abstraction has 2307 states and 3033 transitions. [2019-11-23 21:19:20,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:19:20,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 3033 transitions. [2019-11-23 21:19:20,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2019-11-23 21:19:20,472 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:20,473 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:20,473 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:20,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:20,473 INFO L82 PathProgramCache]: Analyzing trace with hash -379828481, now seen corresponding path program 1 times [2019-11-23 21:19:20,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:20,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388438942] [2019-11-23 21:19:20,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-11-23 21:19:20,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388438942] [2019-11-23 21:19:20,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:20,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 21:19:20,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450292764] [2019-11-23 21:19:20,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:19:20,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:20,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:19:20,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:19:20,654 INFO L87 Difference]: Start difference. First operand 2307 states and 3033 transitions. Second operand 3 states. [2019-11-23 21:19:22,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:22,448 INFO L93 Difference]: Finished difference Result 6257 states and 8424 transitions. [2019-11-23 21:19:22,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:19:22,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 308 [2019-11-23 21:19:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:22,465 INFO L225 Difference]: With dead ends: 6257 [2019-11-23 21:19:22,465 INFO L226 Difference]: Without dead ends: 3294 [2019-11-23 21:19:22,470 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:19:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2019-11-23 21:19:22,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 3294. [2019-11-23 21:19:22,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3294 states. [2019-11-23 21:19:22,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3294 states to 3294 states and 3630 transitions. [2019-11-23 21:19:22,532 INFO L78 Accepts]: Start accepts. Automaton has 3294 states and 3630 transitions. Word has length 308 [2019-11-23 21:19:22,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:22,532 INFO L462 AbstractCegarLoop]: Abstraction has 3294 states and 3630 transitions. [2019-11-23 21:19:22,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:19:22,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states and 3630 transitions. [2019-11-23 21:19:22,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2019-11-23 21:19:22,538 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:22,538 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:22,538 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:22,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:22,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1299025563, now seen corresponding path program 1 times [2019-11-23 21:19:22,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:22,539 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760768386] [2019-11-23 21:19:22,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 91 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:19:23,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760768386] [2019-11-23 21:19:23,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922619530] [2019-11-23 21:19:23,592 INFO L94 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 [2019-11-23 21:19:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:23,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:19:23,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:19:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 21:19:23,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:19:23,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2019-11-23 21:19:23,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430455104] [2019-11-23 21:19:23,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:19:23,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:23,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:19:23,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:19:23,926 INFO L87 Difference]: Start difference. First operand 3294 states and 3630 transitions. Second operand 3 states. [2019-11-23 21:19:25,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:25,307 INFO L93 Difference]: Finished difference Result 7244 states and 7990 transitions. [2019-11-23 21:19:25,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:19:25,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 348 [2019-11-23 21:19:25,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:25,327 INFO L225 Difference]: With dead ends: 7244 [2019-11-23 21:19:25,327 INFO L226 Difference]: Without dead ends: 4281 [2019-11-23 21:19:25,331 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:19:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2019-11-23 21:19:25,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4281. [2019-11-23 21:19:25,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4281 states. [2019-11-23 21:19:25,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 4605 transitions. [2019-11-23 21:19:25,411 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 4605 transitions. Word has length 348 [2019-11-23 21:19:25,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:25,412 INFO L462 AbstractCegarLoop]: Abstraction has 4281 states and 4605 transitions. [2019-11-23 21:19:25,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:19:25,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 4605 transitions. [2019-11-23 21:19:25,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2019-11-23 21:19:25,422 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:25,422 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:25,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:19:25,637 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:25,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:25,637 INFO L82 PathProgramCache]: Analyzing trace with hash 461645349, now seen corresponding path program 1 times [2019-11-23 21:19:25,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:25,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785822373] [2019-11-23 21:19:25,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 220 proven. 6 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2019-11-23 21:19:26,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785822373] [2019-11-23 21:19:26,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433031388] [2019-11-23 21:19:26,008 INFO L94 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 [2019-11-23 21:19:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:26,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:19:26,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:19:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2019-11-23 21:19:26,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:19:26,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-11-23 21:19:26,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176562318] [2019-11-23 21:19:26,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:19:26,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:26,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:19:26,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:19:26,400 INFO L87 Difference]: Start difference. First operand 4281 states and 4605 transitions. Second operand 3 states. [2019-11-23 21:19:27,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:27,462 INFO L93 Difference]: Finished difference Result 8231 states and 8877 transitions. [2019-11-23 21:19:27,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:19:27,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 473 [2019-11-23 21:19:27,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:27,481 INFO L225 Difference]: With dead ends: 8231 [2019-11-23 21:19:27,481 INFO L226 Difference]: Without dead ends: 4281 [2019-11-23 21:19:27,487 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 473 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:19:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2019-11-23 21:19:27,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4281. [2019-11-23 21:19:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4281 states. [2019-11-23 21:19:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 4576 transitions. [2019-11-23 21:19:27,553 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 4576 transitions. Word has length 473 [2019-11-23 21:19:27,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:27,554 INFO L462 AbstractCegarLoop]: Abstraction has 4281 states and 4576 transitions. [2019-11-23 21:19:27,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:19:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 4576 transitions. [2019-11-23 21:19:27,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2019-11-23 21:19:27,565 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:27,565 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:19:27,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:19:27,770 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:27,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:27,770 INFO L82 PathProgramCache]: Analyzing trace with hash 913996250, now seen corresponding path program 1 times [2019-11-23 21:19:27,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:27,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642440832] [2019-11-23 21:19:27,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:28,818 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2019-11-23 21:19:28,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642440832] [2019-11-23 21:19:28,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631394487] [2019-11-23 21:19:28,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 21:19:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:28,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:19:29,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:19:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2019-11-23 21:19:29,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:19:29,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2019-11-23 21:19:29,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159621696] [2019-11-23 21:19:29,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:19:29,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:29,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:19:29,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:19:29,337 INFO L87 Difference]: Start difference. First operand 4281 states and 4576 transitions. Second operand 3 states. [2019-11-23 21:19:30,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:30,384 INFO L93 Difference]: Finished difference Result 5270 states and 5596 transitions. [2019-11-23 21:19:30,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:19:30,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2019-11-23 21:19:30,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:30,406 INFO L225 Difference]: With dead ends: 5270 [2019-11-23 21:19:30,407 INFO L226 Difference]: Without dead ends: 5268 [2019-11-23 21:19:30,409 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:19:30,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2019-11-23 21:19:30,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 4610. [2019-11-23 21:19:30,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4610 states. [2019-11-23 21:19:30,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 4919 transitions. [2019-11-23 21:19:30,484 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 4919 transitions. Word has length 502 [2019-11-23 21:19:30,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:30,485 INFO L462 AbstractCegarLoop]: Abstraction has 4610 states and 4919 transitions. [2019-11-23 21:19:30,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:19:30,485 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 4919 transitions. [2019-11-23 21:19:30,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2019-11-23 21:19:30,514 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:30,515 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:30,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:19:30,719 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:30,720 INFO L82 PathProgramCache]: Analyzing trace with hash -572432818, now seen corresponding path program 1 times [2019-11-23 21:19:30,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:30,720 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318151344] [2019-11-23 21:19:30,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 1378 proven. 0 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2019-11-23 21:19:31,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318151344] [2019-11-23 21:19:31,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:31,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:19:31,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643922865] [2019-11-23 21:19:31,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:19:31,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:31,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:19:31,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:31,929 INFO L87 Difference]: Start difference. First operand 4610 states and 4919 transitions. Second operand 4 states. [2019-11-23 21:19:33,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:33,858 INFO L93 Difference]: Finished difference Result 11521 states and 12371 transitions. [2019-11-23 21:19:33,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:19:33,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 871 [2019-11-23 21:19:33,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:33,884 INFO L225 Difference]: With dead ends: 11521 [2019-11-23 21:19:33,884 INFO L226 Difference]: Without dead ends: 7242 [2019-11-23 21:19:33,890 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7242 states. [2019-11-23 21:19:33,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7242 to 6913. [2019-11-23 21:19:33,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6913 states. [2019-11-23 21:19:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6913 states to 6913 states and 7321 transitions. [2019-11-23 21:19:33,975 INFO L78 Accepts]: Start accepts. Automaton has 6913 states and 7321 transitions. Word has length 871 [2019-11-23 21:19:33,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:33,976 INFO L462 AbstractCegarLoop]: Abstraction has 6913 states and 7321 transitions. [2019-11-23 21:19:33,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:19:33,976 INFO L276 IsEmpty]: Start isEmpty. Operand 6913 states and 7321 transitions. [2019-11-23 21:19:33,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1007 [2019-11-23 21:19:33,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:33,994 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:33,994 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:33,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:33,995 INFO L82 PathProgramCache]: Analyzing trace with hash -593800378, now seen corresponding path program 1 times [2019-11-23 21:19:33,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:33,995 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712886167] [2019-11-23 21:19:33,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1909 backedges. 1281 proven. 130 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2019-11-23 21:19:36,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712886167] [2019-11-23 21:19:36,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643990574] [2019-11-23 21:19:36,488 INFO L94 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 [2019-11-23 21:19:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:36,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:19:36,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:19:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1909 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 1634 trivial. 0 not checked. [2019-11-23 21:19:37,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:19:37,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2019-11-23 21:19:37,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379924678] [2019-11-23 21:19:37,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:19:37,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:37,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:19:37,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:19:37,564 INFO L87 Difference]: Start difference. First operand 6913 states and 7321 transitions. Second operand 3 states. [2019-11-23 21:19:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:38,780 INFO L93 Difference]: Finished difference Result 15469 states and 16407 transitions. [2019-11-23 21:19:38,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:19:38,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1006 [2019-11-23 21:19:38,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:38,804 INFO L225 Difference]: With dead ends: 15469 [2019-11-23 21:19:38,805 INFO L226 Difference]: Without dead ends: 8887 [2019-11-23 21:19:38,812 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1015 GetRequests, 1006 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:19:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8887 states. [2019-11-23 21:19:38,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8887 to 7571. [2019-11-23 21:19:38,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7571 states. [2019-11-23 21:19:38,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 8035 transitions. [2019-11-23 21:19:38,915 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 8035 transitions. Word has length 1006 [2019-11-23 21:19:38,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:38,916 INFO L462 AbstractCegarLoop]: Abstraction has 7571 states and 8035 transitions. [2019-11-23 21:19:38,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:19:38,917 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 8035 transitions. [2019-11-23 21:19:38,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1104 [2019-11-23 21:19:38,938 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:38,939 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:19:39,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:19:39,147 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:39,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:39,148 INFO L82 PathProgramCache]: Analyzing trace with hash -497350162, now seen corresponding path program 1 times [2019-11-23 21:19:39,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:39,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057702598] [2019-11-23 21:19:39,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 1602 proven. 130 refuted. 0 times theorem prover too weak. 920 trivial. 0 not checked. [2019-11-23 21:19:40,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057702598] [2019-11-23 21:19:40,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530254920] [2019-11-23 21:19:40,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 21:19:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:41,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:19:41,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:19:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 1586 proven. 0 refuted. 0 times theorem prover too weak. 1066 trivial. 0 not checked. [2019-11-23 21:19:41,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:19:41,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2019-11-23 21:19:41,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760210366] [2019-11-23 21:19:41,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:19:41,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:41,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:19:41,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:19:41,775 INFO L87 Difference]: Start difference. First operand 7571 states and 8035 transitions. Second operand 3 states. [2019-11-23 21:19:42,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:42,923 INFO L93 Difference]: Finished difference Result 14811 states and 15737 transitions. [2019-11-23 21:19:42,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:19:42,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1103 [2019-11-23 21:19:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:42,946 INFO L225 Difference]: With dead ends: 14811 [2019-11-23 21:19:42,946 INFO L226 Difference]: Without dead ends: 7571 [2019-11-23 21:19:42,953 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1103 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:19:42,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7571 states. [2019-11-23 21:19:43,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7571 to 7571. [2019-11-23 21:19:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7571 states. [2019-11-23 21:19:43,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 7970 transitions. [2019-11-23 21:19:43,036 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 7970 transitions. Word has length 1103 [2019-11-23 21:19:43,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:43,037 INFO L462 AbstractCegarLoop]: Abstraction has 7571 states and 7970 transitions. [2019-11-23 21:19:43,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:19:43,037 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 7970 transitions. [2019-11-23 21:19:43,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1160 [2019-11-23 21:19:43,060 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:43,063 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2019-11-23 21:19:43,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:19:43,277 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:43,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:43,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2088480148, now seen corresponding path program 1 times [2019-11-23 21:19:43,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:43,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813839523] [2019-11-23 21:19:43,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2037 backedges. 1244 proven. 4 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2019-11-23 21:19:45,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813839523] [2019-11-23 21:19:45,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44729727] [2019-11-23 21:19:45,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 21:19:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:45,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 1328 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:19:45,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:19:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2037 backedges. 1048 proven. 0 refuted. 0 times theorem prover too weak. 989 trivial. 0 not checked. [2019-11-23 21:19:46,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:19:46,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2019-11-23 21:19:46,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439402169] [2019-11-23 21:19:46,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:19:46,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:46,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:19:46,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:19:46,188 INFO L87 Difference]: Start difference. First operand 7571 states and 7970 transitions. Second operand 3 states. [2019-11-23 21:19:47,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:47,304 INFO L93 Difference]: Finished difference Result 15798 states and 16615 transitions. [2019-11-23 21:19:47,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:19:47,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1159 [2019-11-23 21:19:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:47,320 INFO L225 Difference]: With dead ends: 15798 [2019-11-23 21:19:47,320 INFO L226 Difference]: Without dead ends: 7571 [2019-11-23 21:19:47,328 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1165 GetRequests, 1158 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:19:47,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7571 states. [2019-11-23 21:19:47,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7571 to 7571. [2019-11-23 21:19:47,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7571 states. [2019-11-23 21:19:47,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 7875 transitions. [2019-11-23 21:19:47,418 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 7875 transitions. Word has length 1159 [2019-11-23 21:19:47,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:47,419 INFO L462 AbstractCegarLoop]: Abstraction has 7571 states and 7875 transitions. [2019-11-23 21:19:47,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:19:47,419 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 7875 transitions. [2019-11-23 21:19:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1222 [2019-11-23 21:19:47,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:47,453 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:47,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:19:47,666 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:47,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:47,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1631914977, now seen corresponding path program 1 times [2019-11-23 21:19:47,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:47,667 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601088945] [2019-11-23 21:19:47,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1679 proven. 130 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2019-11-23 21:19:49,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601088945] [2019-11-23 21:19:49,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821277027] [2019-11-23 21:19:49,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 21:19:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:49,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 21:19:49,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:19:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1513 proven. 0 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2019-11-23 21:19:50,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:19:50,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2019-11-23 21:19:50,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602173324] [2019-11-23 21:19:50,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:19:50,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:50,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:19:50,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:19:50,588 INFO L87 Difference]: Start difference. First operand 7571 states and 7875 transitions. Second operand 3 states. [2019-11-23 21:19:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:51,793 INFO L93 Difference]: Finished difference Result 16456 states and 17131 transitions. [2019-11-23 21:19:51,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:19:51,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1221 [2019-11-23 21:19:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:51,805 INFO L225 Difference]: With dead ends: 16456 [2019-11-23 21:19:51,805 INFO L226 Difference]: Without dead ends: 9216 [2019-11-23 21:19:51,812 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1230 GetRequests, 1221 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:19:51,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2019-11-23 21:19:51,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 9216. [2019-11-23 21:19:51,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9216 states. [2019-11-23 21:19:51,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9216 states to 9216 states and 9543 transitions. [2019-11-23 21:19:51,910 INFO L78 Accepts]: Start accepts. Automaton has 9216 states and 9543 transitions. Word has length 1221 [2019-11-23 21:19:51,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:51,911 INFO L462 AbstractCegarLoop]: Abstraction has 9216 states and 9543 transitions. [2019-11-23 21:19:51,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:19:51,911 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states and 9543 transitions. [2019-11-23 21:19:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1607 [2019-11-23 21:19:51,946 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:51,947 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2019-11-23 21:19:52,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:19:52,151 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:52,153 INFO L82 PathProgramCache]: Analyzing trace with hash 447965945, now seen corresponding path program 1 times [2019-11-23 21:19:52,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:52,153 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685874850] [2019-11-23 21:19:52,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4250 backedges. 3062 proven. 0 refuted. 0 times theorem prover too weak. 1188 trivial. 0 not checked. [2019-11-23 21:19:54,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685874850] [2019-11-23 21:19:54,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:54,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:19:54,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809571020] [2019-11-23 21:19:54,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 21:19:54,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:54,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 21:19:54,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:19:54,899 INFO L87 Difference]: Start difference. First operand 9216 states and 9543 transitions. Second operand 6 states. [2019-11-23 21:19:57,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:57,491 INFO L93 Difference]: Finished difference Result 18768 states and 19451 transitions. [2019-11-23 21:19:57,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 21:19:57,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1606 [2019-11-23 21:19:57,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:57,506 INFO L225 Difference]: With dead ends: 18768 [2019-11-23 21:19:57,507 INFO L226 Difference]: Without dead ends: 9883 [2019-11-23 21:19:57,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:19:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9883 states. [2019-11-23 21:19:57,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9883 to 9874. [2019-11-23 21:19:57,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9874 states. [2019-11-23 21:19:57,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9874 states to 9874 states and 10224 transitions. [2019-11-23 21:19:57,760 INFO L78 Accepts]: Start accepts. Automaton has 9874 states and 10224 transitions. Word has length 1606 [2019-11-23 21:19:57,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:57,762 INFO L462 AbstractCegarLoop]: Abstraction has 9874 states and 10224 transitions. [2019-11-23 21:19:57,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 21:19:57,762 INFO L276 IsEmpty]: Start isEmpty. Operand 9874 states and 10224 transitions. [2019-11-23 21:19:57,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1693 [2019-11-23 21:19:57,816 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:57,817 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:57,818 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:57,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:57,819 INFO L82 PathProgramCache]: Analyzing trace with hash -127619151, now seen corresponding path program 1 times [2019-11-23 21:19:57,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:57,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646235030] [2019-11-23 21:19:57,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4762 backedges. 3487 proven. 385 refuted. 0 times theorem prover too weak. 890 trivial. 0 not checked. [2019-11-23 21:20:00,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646235030] [2019-11-23 21:20:00,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778531387] [2019-11-23 21:20:00,644 INFO L94 rtionOrderModulation]: Keeping assertion order 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 [2019-11-23 21:20:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:01,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 1942 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:20:01,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:20:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4762 backedges. 2664 proven. 0 refuted. 0 times theorem prover too weak. 2098 trivial. 0 not checked. [2019-11-23 21:20:02,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:20:02,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-23 21:20:02,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332737224] [2019-11-23 21:20:02,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:20:02,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:02,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:20:02,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:20:02,247 INFO L87 Difference]: Start difference. First operand 9874 states and 10224 transitions. Second operand 3 states. [2019-11-23 21:20:03,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:03,337 INFO L93 Difference]: Finished difference Result 19746 states and 20456 transitions. [2019-11-23 21:20:03,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:20:03,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1692 [2019-11-23 21:20:03,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:03,349 INFO L225 Difference]: With dead ends: 19746 [2019-11-23 21:20:03,350 INFO L226 Difference]: Without dead ends: 10203 [2019-11-23 21:20:03,357 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1699 GetRequests, 1692 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:20:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10203 states. [2019-11-23 21:20:03,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10203 to 9874. [2019-11-23 21:20:03,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9874 states. [2019-11-23 21:20:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9874 states to 9874 states and 10159 transitions. [2019-11-23 21:20:03,453 INFO L78 Accepts]: Start accepts. Automaton has 9874 states and 10159 transitions. Word has length 1692 [2019-11-23 21:20:03,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:03,454 INFO L462 AbstractCegarLoop]: Abstraction has 9874 states and 10159 transitions. [2019-11-23 21:20:03,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:20:03,455 INFO L276 IsEmpty]: Start isEmpty. Operand 9874 states and 10159 transitions. [2019-11-23 21:20:03,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1838 [2019-11-23 21:20:03,492 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:03,496 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:20:03,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:20:03,701 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:03,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:03,702 INFO L82 PathProgramCache]: Analyzing trace with hash -2094496340, now seen corresponding path program 1 times [2019-11-23 21:20:03,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:03,703 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962656108] [2019-11-23 21:20:03,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6373 backedges. 1708 proven. 0 refuted. 0 times theorem prover too weak. 4665 trivial. 0 not checked. [2019-11-23 21:20:06,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962656108] [2019-11-23 21:20:06,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:20:06,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 21:20:06,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062537674] [2019-11-23 21:20:06,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:20:06,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:06,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:20:06,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:20:06,083 INFO L87 Difference]: Start difference. First operand 9874 states and 10159 transitions. Second operand 5 states. [2019-11-23 21:20:08,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:08,832 INFO L93 Difference]: Finished difference Result 29616 states and 30529 transitions. [2019-11-23 21:20:08,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:20:08,833 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1837 [2019-11-23 21:20:08,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:08,849 INFO L225 Difference]: With dead ends: 29616 [2019-11-23 21:20:08,849 INFO L226 Difference]: Without dead ends: 19744 [2019-11-23 21:20:08,858 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:20:08,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19744 states. [2019-11-23 21:20:08,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19744 to 15138. [2019-11-23 21:20:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15138 states. [2019-11-23 21:20:09,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15138 states to 15138 states and 15571 transitions. [2019-11-23 21:20:09,005 INFO L78 Accepts]: Start accepts. Automaton has 15138 states and 15571 transitions. Word has length 1837 [2019-11-23 21:20:09,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:09,005 INFO L462 AbstractCegarLoop]: Abstraction has 15138 states and 15571 transitions. [2019-11-23 21:20:09,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:20:09,005 INFO L276 IsEmpty]: Start isEmpty. Operand 15138 states and 15571 transitions. [2019-11-23 21:20:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1982 [2019-11-23 21:20:09,033 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:09,034 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2019-11-23 21:20:09,034 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:09,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:09,035 INFO L82 PathProgramCache]: Analyzing trace with hash -890231504, now seen corresponding path program 1 times [2019-11-23 21:20:09,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:09,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641733048] [2019-11-23 21:20:09,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6954 backedges. 4153 proven. 0 refuted. 0 times theorem prover too weak. 2801 trivial. 0 not checked. [2019-11-23 21:20:11,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641733048] [2019-11-23 21:20:11,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:20:11,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:20:11,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485520138] [2019-11-23 21:20:11,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:20:11,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:11,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:20:11,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:20:11,089 INFO L87 Difference]: Start difference. First operand 15138 states and 15571 transitions. Second operand 3 states. [2019-11-23 21:20:12,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:12,310 INFO L93 Difference]: Finished difference Result 31590 states and 32492 transitions. [2019-11-23 21:20:12,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:20:12,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1981 [2019-11-23 21:20:12,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:12,325 INFO L225 Difference]: With dead ends: 31590 [2019-11-23 21:20:12,326 INFO L226 Difference]: Without dead ends: 16783 [2019-11-23 21:20:12,333 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:20:12,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16783 states. [2019-11-23 21:20:12,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16783 to 16454. [2019-11-23 21:20:12,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16454 states. [2019-11-23 21:20:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16454 states to 16454 states and 16881 transitions. [2019-11-23 21:20:12,495 INFO L78 Accepts]: Start accepts. Automaton has 16454 states and 16881 transitions. Word has length 1981 [2019-11-23 21:20:12,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:12,496 INFO L462 AbstractCegarLoop]: Abstraction has 16454 states and 16881 transitions. [2019-11-23 21:20:12,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:20:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 16454 states and 16881 transitions. [2019-11-23 21:20:12,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2081 [2019-11-23 21:20:12,530 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:12,531 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:20:12,532 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:12,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1261936362, now seen corresponding path program 1 times [2019-11-23 21:20:12,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:12,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671680947] [2019-11-23 21:20:12,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7352 backedges. 3755 proven. 0 refuted. 0 times theorem prover too weak. 3597 trivial. 0 not checked. [2019-11-23 21:20:14,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671680947] [2019-11-23 21:20:14,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:20:14,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:20:14,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218729867] [2019-11-23 21:20:14,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:20:14,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:14,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:20:14,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:20:14,434 INFO L87 Difference]: Start difference. First operand 16454 states and 16881 transitions. Second operand 4 states. [2019-11-23 21:20:16,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:16,303 INFO L93 Difference]: Finished difference Result 32577 states and 33429 transitions. [2019-11-23 21:20:16,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:20:16,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 2080 [2019-11-23 21:20:16,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:16,318 INFO L225 Difference]: With dead ends: 32577 [2019-11-23 21:20:16,319 INFO L226 Difference]: Without dead ends: 16454 [2019-11-23 21:20:16,328 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:20:16,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16454 states. [2019-11-23 21:20:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16454 to 15796. [2019-11-23 21:20:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15796 states. [2019-11-23 21:20:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15796 states to 15796 states and 16104 transitions. [2019-11-23 21:20:16,515 INFO L78 Accepts]: Start accepts. Automaton has 15796 states and 16104 transitions. Word has length 2080 [2019-11-23 21:20:16,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:16,516 INFO L462 AbstractCegarLoop]: Abstraction has 15796 states and 16104 transitions. [2019-11-23 21:20:16,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:20:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand 15796 states and 16104 transitions. [2019-11-23 21:20:16,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2107 [2019-11-23 21:20:16,542 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:16,543 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:20:16,544 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:16,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:16,544 INFO L82 PathProgramCache]: Analyzing trace with hash 777095257, now seen corresponding path program 1 times [2019-11-23 21:20:16,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:16,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609933734] [2019-11-23 21:20:16,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7659 backedges. 2469 proven. 4286 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked. [2019-11-23 21:20:24,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609933734] [2019-11-23 21:20:24,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503742544] [2019-11-23 21:20:24,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 21:20:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:24,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 2403 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:20:24,812 INFO L278 TraceCheckSpWp]: Computing forward predicates...