/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/Problem15_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:16:02,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:16:02,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:16:02,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:16:02,344 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 21:16:02,359 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:16:02,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:16:02,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:16:02,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:16:02,361 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:16:02,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:16:02,362 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:16:02,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:16:02,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:16:02,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:16:02,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:16:02,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:16:02,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:16:02,363 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:16:02,364 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:16:02,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:16:02,364 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:16:02,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:16:02,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:16:02,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:16:02,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:16:02,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:16:02,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:16:02,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:16:02,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:16:02,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:16:02,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:16:02,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:16:02,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:16:02,367 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:16:02,656 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:16:02,680 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:16:02,683 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:16:02,685 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:16:02,685 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:16:02,686 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label49.c [2019-11-23 21:16:02,762 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bff597db1/d4a53c955c1f482795daaf8358a0d7f0/FLAG842215cc6 [2019-11-23 21:16:03,433 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:16:03,433 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label49.c [2019-11-23 21:16:03,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bff597db1/d4a53c955c1f482795daaf8358a0d7f0/FLAG842215cc6 [2019-11-23 21:16:03,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bff597db1/d4a53c955c1f482795daaf8358a0d7f0 [2019-11-23 21:16:03,591 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:16:03,593 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:16:03,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:16:03,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:16:03,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:16:03,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:16:03" (1/1) ... [2019-11-23 21:16:03,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14998bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:03, skipping insertion in model container [2019-11-23 21:16:03,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:16:03" (1/1) ... [2019-11-23 21:16:03,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:16:03,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:16:04,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:16:04,563 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:16:04,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:16:04,890 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:16:04,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:04 WrapperNode [2019-11-23 21:16:04,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:16:04,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:16:04,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:16:04,893 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:16:04,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:04" (1/1) ... [2019-11-23 21:16:04,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:04" (1/1) ... [2019-11-23 21:16:05,178 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:16:05,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:16:05,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:16:05,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:16:05,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:04" (1/1) ... [2019-11-23 21:16:05,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:04" (1/1) ... [2019-11-23 21:16:05,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:04" (1/1) ... [2019-11-23 21:16:05,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:04" (1/1) ... [2019-11-23 21:16:05,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:04" (1/1) ... [2019-11-23 21:16:05,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:04" (1/1) ... [2019-11-23 21:16:05,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:04" (1/1) ... [2019-11-23 21:16:05,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:16:05,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:16:05,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:16:05,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:16:05,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:04" (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 21:16:05,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:16:05,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:16:09,006 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:16:09,007 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 21:16:09,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:16:09 BoogieIcfgContainer [2019-11-23 21:16:09,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:16:09,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:16:09,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:16:09,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:16:09,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:16:03" (1/3) ... [2019-11-23 21:16:09,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dbaa9f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:16:09, skipping insertion in model container [2019-11-23 21:16:09,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:04" (2/3) ... [2019-11-23 21:16:09,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dbaa9f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:16:09, skipping insertion in model container [2019-11-23 21:16:09,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:16:09" (3/3) ... [2019-11-23 21:16:09,018 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label49.c [2019-11-23 21:16:09,030 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:16:09,044 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:16:09,057 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:16:09,104 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:16:09,104 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:16:09,105 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:16:09,105 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:16:09,105 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:16:09,106 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:16:09,106 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:16:09,106 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:16:09,143 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states. [2019-11-23 21:16:09,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 21:16:09,152 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:16:09,153 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, 1, 1, 1, 1] [2019-11-23 21:16:09,153 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:16:09,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:16:09,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1382487458, now seen corresponding path program 1 times [2019-11-23 21:16:09,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:16:09,165 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932501872] [2019-11-23 21:16:09,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:16:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:09,520 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 21:16:09,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932501872] [2019-11-23 21:16:09,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:16:09,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:16:09,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843379872] [2019-11-23 21:16:09,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:16:09,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:16:09,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:16:09,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:16:09,547 INFO L87 Difference]: Start difference. First operand 424 states. Second operand 4 states. [2019-11-23 21:16:13,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:16:13,696 INFO L93 Difference]: Finished difference Result 1468 states and 2718 transitions. [2019-11-23 21:16:13,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:16:13,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2019-11-23 21:16:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:16:13,725 INFO L225 Difference]: With dead ends: 1468 [2019-11-23 21:16:13,725 INFO L226 Difference]: Without dead ends: 977 [2019-11-23 21:16:13,731 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 21:16:13,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2019-11-23 21:16:13,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 973. [2019-11-23 21:16:13,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2019-11-23 21:16:13,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1487 transitions. [2019-11-23 21:16:13,837 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1487 transitions. Word has length 52 [2019-11-23 21:16:13,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:16:13,837 INFO L462 AbstractCegarLoop]: Abstraction has 973 states and 1487 transitions. [2019-11-23 21:16:13,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:16:13,838 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1487 transitions. [2019-11-23 21:16:13,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-23 21:16:13,847 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:16:13,847 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, 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] [2019-11-23 21:16:13,848 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:16:13,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:16:13,848 INFO L82 PathProgramCache]: Analyzing trace with hash 804988061, now seen corresponding path program 1 times [2019-11-23 21:16:13,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:16:13,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816163513] [2019-11-23 21:16:13,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:16:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:16:14,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816163513] [2019-11-23 21:16:14,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:16:14,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:16:14,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622417418] [2019-11-23 21:16:14,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:16:14,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:16:14,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:16:14,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:16:14,187 INFO L87 Difference]: Start difference. First operand 973 states and 1487 transitions. Second operand 4 states. [2019-11-23 21:16:17,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:16:17,687 INFO L93 Difference]: Finished difference Result 3746 states and 5750 transitions. [2019-11-23 21:16:17,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:16:17,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2019-11-23 21:16:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:16:17,703 INFO L225 Difference]: With dead ends: 3746 [2019-11-23 21:16:17,703 INFO L226 Difference]: Without dead ends: 2775 [2019-11-23 21:16:17,706 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 21:16:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2019-11-23 21:16:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 1872. [2019-11-23 21:16:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1872 states. [2019-11-23 21:16:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2495 transitions. [2019-11-23 21:16:17,763 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2495 transitions. Word has length 171 [2019-11-23 21:16:17,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:16:17,764 INFO L462 AbstractCegarLoop]: Abstraction has 1872 states and 2495 transitions. [2019-11-23 21:16:17,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:16:17,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2495 transitions. [2019-11-23 21:16:17,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-11-23 21:16:17,770 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:16:17,770 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, 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] [2019-11-23 21:16:17,770 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:16:17,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:16:17,771 INFO L82 PathProgramCache]: Analyzing trace with hash 649952050, now seen corresponding path program 1 times [2019-11-23 21:16:17,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:16:17,772 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7709101] [2019-11-23 21:16:17,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:16:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-23 21:16:18,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7709101] [2019-11-23 21:16:18,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911886626] [2019-11-23 21:16:18,096 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 21:16:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:18,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:16:18,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:16:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:16:18,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:16:18,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-11-23 21:16:18,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056354246] [2019-11-23 21:16:18,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:16:18,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:16:18,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:16:18,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:16:18,443 INFO L87 Difference]: Start difference. First operand 1872 states and 2495 transitions. Second operand 3 states. [2019-11-23 21:16:22,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:16:22,100 INFO L93 Difference]: Finished difference Result 4938 states and 6528 transitions. [2019-11-23 21:16:22,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:16:22,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 248 [2019-11-23 21:16:22,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:16:22,115 INFO L225 Difference]: With dead ends: 4938 [2019-11-23 21:16:22,116 INFO L226 Difference]: Without dead ends: 3068 [2019-11-23 21:16:22,119 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 248 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 21:16:22,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3068 states. [2019-11-23 21:16:22,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3068 to 2171. [2019-11-23 21:16:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2171 states. [2019-11-23 21:16:22,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 2848 transitions. [2019-11-23 21:16:22,205 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 2848 transitions. Word has length 248 [2019-11-23 21:16:22,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:16:22,208 INFO L462 AbstractCegarLoop]: Abstraction has 2171 states and 2848 transitions. [2019-11-23 21:16:22,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:16:22,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 2848 transitions. [2019-11-23 21:16:22,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2019-11-23 21:16:22,224 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:16:22,225 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:16:22,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:16:22,433 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:16:22,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:16:22,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1262660511, now seen corresponding path program 1 times [2019-11-23 21:16:22,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:16:22,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521375500] [2019-11-23 21:16:22,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:16:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 21:16:23,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521375500] [2019-11-23 21:16:23,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:16:23,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:16:23,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513413814] [2019-11-23 21:16:23,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:16:23,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:16:23,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:16:23,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:16:23,144 INFO L87 Difference]: Start difference. First operand 2171 states and 2848 transitions. Second operand 5 states. [2019-11-23 21:16:27,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:16:27,617 INFO L93 Difference]: Finished difference Result 5239 states and 6673 transitions. [2019-11-23 21:16:27,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:16:27,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2019-11-23 21:16:27,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:16:27,637 INFO L225 Difference]: With dead ends: 5239 [2019-11-23 21:16:27,638 INFO L226 Difference]: Without dead ends: 3070 [2019-11-23 21:16:27,641 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 21:16:27,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2019-11-23 21:16:27,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2770. [2019-11-23 21:16:27,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2770 states. [2019-11-23 21:16:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 3489 transitions. [2019-11-23 21:16:27,693 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 3489 transitions. Word has length 330 [2019-11-23 21:16:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:16:27,693 INFO L462 AbstractCegarLoop]: Abstraction has 2770 states and 3489 transitions. [2019-11-23 21:16:27,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:16:27,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 3489 transitions. [2019-11-23 21:16:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2019-11-23 21:16:27,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:16:27,701 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:16:27,701 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:16:27,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:16:27,702 INFO L82 PathProgramCache]: Analyzing trace with hash 746881843, now seen corresponding path program 1 times [2019-11-23 21:16:27,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:16:27,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593988571] [2019-11-23 21:16:27,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:16:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:16:28,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593988571] [2019-11-23 21:16:28,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:16:28,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:16:28,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712065105] [2019-11-23 21:16:28,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:16:28,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:16:28,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:16:28,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:16:28,134 INFO L87 Difference]: Start difference. First operand 2770 states and 3489 transitions. Second operand 4 states. [2019-11-23 21:16:31,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:16:31,825 INFO L93 Difference]: Finished difference Result 6745 states and 8667 transitions. [2019-11-23 21:16:31,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:16:31,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 404 [2019-11-23 21:16:31,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:16:31,843 INFO L225 Difference]: With dead ends: 6745 [2019-11-23 21:16:31,843 INFO L226 Difference]: Without dead ends: 3977 [2019-11-23 21:16:31,847 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 4 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 21:16:31,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3977 states. [2019-11-23 21:16:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3977 to 3974. [2019-11-23 21:16:31,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3974 states. [2019-11-23 21:16:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 4917 transitions. [2019-11-23 21:16:31,916 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 4917 transitions. Word has length 404 [2019-11-23 21:16:31,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:16:31,917 INFO L462 AbstractCegarLoop]: Abstraction has 3974 states and 4917 transitions. [2019-11-23 21:16:31,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:16:31,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 4917 transitions. [2019-11-23 21:16:31,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2019-11-23 21:16:31,925 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:16:31,926 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:16:31,926 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:16:31,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:16:31,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1419669949, now seen corresponding path program 1 times [2019-11-23 21:16:31,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:16:31,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595277688] [2019-11-23 21:16:31,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:16:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:16:32,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595277688] [2019-11-23 21:16:32,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14489018] [2019-11-23 21:16:32,612 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 21:16:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:16:32,752 INFO L255 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 21:16:32,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:16:32,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:16:32,822 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:32,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:32,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:32,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:32,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:32,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:32,835 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:32,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:32,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:32,841 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:16:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 155 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:16:33,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:16:33,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 10 [2019-11-23 21:16:33,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694889642] [2019-11-23 21:16:33,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 21:16:33,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:16:33,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 21:16:33,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:16:33,327 INFO L87 Difference]: Start difference. First operand 3974 states and 4917 transitions. Second operand 10 states. [2019-11-23 21:17:09,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:17:09,403 INFO L93 Difference]: Finished difference Result 37359 states and 47567 transitions. [2019-11-23 21:17:09,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 21:17:09,404 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 429 [2019-11-23 21:17:09,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:17:09,501 INFO L225 Difference]: With dead ends: 37359 [2019-11-23 21:17:09,501 INFO L226 Difference]: Without dead ends: 30098 [2019-11-23 21:17:09,517 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=342, Invalid=1064, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 21:17:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30098 states. [2019-11-23 21:17:09,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30098 to 17476. [2019-11-23 21:17:09,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17476 states. [2019-11-23 21:17:10,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17476 states to 17476 states and 20540 transitions. [2019-11-23 21:17:10,021 INFO L78 Accepts]: Start accepts. Automaton has 17476 states and 20540 transitions. Word has length 429 [2019-11-23 21:17:10,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:17:10,022 INFO L462 AbstractCegarLoop]: Abstraction has 17476 states and 20540 transitions. [2019-11-23 21:17:10,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 21:17:10,022 INFO L276 IsEmpty]: Start isEmpty. Operand 17476 states and 20540 transitions. [2019-11-23 21:17:10,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2019-11-23 21:17:10,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:17:10,039 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, 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, 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, 1, 1, 1, 1, 1, 1] [2019-11-23 21:17:10,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:17:10,251 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:17:10,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:17:10,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1533398278, now seen corresponding path program 1 times [2019-11-23 21:17:10,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:17:10,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123844303] [2019-11-23 21:17:10,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:17:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-23 21:17:10,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123844303] [2019-11-23 21:17:10,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:17:10,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:17:10,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784392523] [2019-11-23 21:17:10,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:17:10,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:17:10,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:17:10,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:17:10,827 INFO L87 Difference]: Start difference. First operand 17476 states and 20540 transitions. Second operand 4 states. [2019-11-23 21:17:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:17:14,119 INFO L93 Difference]: Finished difference Result 34656 states and 40770 transitions. [2019-11-23 21:17:14,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:17:14,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 530 [2019-11-23 21:17:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:17:14,160 INFO L225 Difference]: With dead ends: 34656 [2019-11-23 21:17:14,161 INFO L226 Difference]: Without dead ends: 17182 [2019-11-23 21:17:14,183 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 21:17:14,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17182 states. [2019-11-23 21:17:14,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17182 to 17174. [2019-11-23 21:17:14,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17174 states. [2019-11-23 21:17:14,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17174 states to 17174 states and 19222 transitions. [2019-11-23 21:17:14,544 INFO L78 Accepts]: Start accepts. Automaton has 17174 states and 19222 transitions. Word has length 530 [2019-11-23 21:17:14,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:17:14,544 INFO L462 AbstractCegarLoop]: Abstraction has 17174 states and 19222 transitions. [2019-11-23 21:17:14,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:17:14,545 INFO L276 IsEmpty]: Start isEmpty. Operand 17174 states and 19222 transitions. [2019-11-23 21:17:14,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2019-11-23 21:17:14,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:17:14,567 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:17:14,567 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:17:14,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:17:14,568 INFO L82 PathProgramCache]: Analyzing trace with hash 572216286, now seen corresponding path program 1 times [2019-11-23 21:17:14,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:17:14,568 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716659107] [2019-11-23 21:17:14,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:17:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 262 proven. 140 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-23 21:17:16,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716659107] [2019-11-23 21:17:16,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93261189] [2019-11-23 21:17:16,374 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 21:17:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:16,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:17:16,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:17:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-23 21:17:16,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:17:16,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-23 21:17:16,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200240248] [2019-11-23 21:17:16,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:17:16,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:17:16,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:17:16,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:17:16,821 INFO L87 Difference]: Start difference. First operand 17174 states and 19222 transitions. Second operand 3 states. [2019-11-23 21:17:18,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:17:18,638 INFO L93 Difference]: Finished difference Result 34944 states and 39074 transitions. [2019-11-23 21:17:18,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:17:18,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 615 [2019-11-23 21:17:18,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:17:18,670 INFO L225 Difference]: With dead ends: 34944 [2019-11-23 21:17:18,670 INFO L226 Difference]: Without dead ends: 17772 [2019-11-23 21:17:18,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 615 SyntacticMatches, 8 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:17:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17772 states. [2019-11-23 21:17:18,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17772 to 17473. [2019-11-23 21:17:18,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17473 states. [2019-11-23 21:17:18,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17473 states to 17473 states and 19327 transitions. [2019-11-23 21:17:18,939 INFO L78 Accepts]: Start accepts. Automaton has 17473 states and 19327 transitions. Word has length 615 [2019-11-23 21:17:18,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:17:18,940 INFO L462 AbstractCegarLoop]: Abstraction has 17473 states and 19327 transitions. [2019-11-23 21:17:18,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:17:18,940 INFO L276 IsEmpty]: Start isEmpty. Operand 17473 states and 19327 transitions. [2019-11-23 21:17:18,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2019-11-23 21:17:18,952 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:17:18,954 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:19,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:17:19,160 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:17:19,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:17:19,160 INFO L82 PathProgramCache]: Analyzing trace with hash -670688848, now seen corresponding path program 1 times [2019-11-23 21:17:19,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:17:19,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312065054] [2019-11-23 21:17:19,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:17:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 799 backedges. 465 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2019-11-23 21:17:20,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312065054] [2019-11-23 21:17:20,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:17:20,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 21:17:20,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385291316] [2019-11-23 21:17:20,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:17:20,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:17:20,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:17:20,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:17:20,778 INFO L87 Difference]: Start difference. First operand 17473 states and 19327 transitions. Second operand 5 states. [2019-11-23 21:17:24,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:17:24,063 INFO L93 Difference]: Finished difference Result 40568 states and 44652 transitions. [2019-11-23 21:17:24,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:17:24,063 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 654 [2019-11-23 21:17:24,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:17:24,106 INFO L225 Difference]: With dead ends: 40568 [2019-11-23 21:17:24,106 INFO L226 Difference]: Without dead ends: 17416 [2019-11-23 21:17:24,126 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 21:17:24,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17416 states. [2019-11-23 21:17:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17416 to 11716. [2019-11-23 21:17:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11716 states. [2019-11-23 21:17:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11716 states to 11716 states and 12212 transitions. [2019-11-23 21:17:24,305 INFO L78 Accepts]: Start accepts. Automaton has 11716 states and 12212 transitions. Word has length 654 [2019-11-23 21:17:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:17:24,306 INFO L462 AbstractCegarLoop]: Abstraction has 11716 states and 12212 transitions. [2019-11-23 21:17:24,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:17:24,306 INFO L276 IsEmpty]: Start isEmpty. Operand 11716 states and 12212 transitions. [2019-11-23 21:17:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2019-11-23 21:17:24,325 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:17:24,329 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:24,329 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:17:24,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:17:24,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1083835968, now seen corresponding path program 1 times [2019-11-23 21:17:24,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:17:24,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659025117] [2019-11-23 21:17:24,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:17:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 264 proven. 435 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-23 21:17:26,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659025117] [2019-11-23 21:17:26,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129923247] [2019-11-23 21:17:26,184 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 21:17:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:17:26,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 21:17:26,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:17:26,484 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:17:26,484 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:17:26,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:17:26,487 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:17:26,491 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:17:26,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:17:26,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:17:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 453 proven. 176 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-23 21:17:27,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:17:27,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-23 21:17:27,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460050462] [2019-11-23 21:17:27,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 21:17:27,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:17:27,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 21:17:27,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2019-11-23 21:17:27,450 INFO L87 Difference]: Start difference. First operand 11716 states and 12212 transitions. Second operand 16 states.