/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/Problem18_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:22:55,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:22:55,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:22:55,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:22:55,771 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 21:22:55,790 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:22:55,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:22:55,793 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:22:55,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:22:55,794 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:22:55,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:22:55,794 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:22:55,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:22:55,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:22:55,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:22:55,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:22:55,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:22:55,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:22:55,796 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:22:55,796 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:22:55,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:22:55,798 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:22:55,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:22:55,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:22:55,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:22:55,799 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:22:55,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:22:55,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:22:55,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:22:55,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:22:55,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:22:55,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:22:55,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:22:55,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:22:55,801 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:22:56,071 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:22:56,090 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:22:56,093 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:22:56,095 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:22:56,096 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:22:56,096 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label25.c [2019-11-23 21:22:56,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e299da4e9/dd8aad4ba2f34d1788b8288ebea3958c/FLAG030d207c0 [2019-11-23 21:22:56,961 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:22:56,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label25.c [2019-11-23 21:22:56,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e299da4e9/dd8aad4ba2f34d1788b8288ebea3958c/FLAG030d207c0 [2019-11-23 21:22:57,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e299da4e9/dd8aad4ba2f34d1788b8288ebea3958c [2019-11-23 21:22:57,029 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:22:57,031 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:22:57,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:22:57,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:22:57,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:22:57,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:57" (1/1) ... [2019-11-23 21:22:57,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20bf000b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:57, skipping insertion in model container [2019-11-23 21:22:57,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:57" (1/1) ... [2019-11-23 21:22:57,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:22:57,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:22:58,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:22:58,306 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:22:58,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:22:58,901 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:22:58,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:58 WrapperNode [2019-11-23 21:22:58,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:22:58,903 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:22:58,903 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:22:58,903 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:22:58,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:58" (1/1) ... [2019-11-23 21:22:58,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:58" (1/1) ... [2019-11-23 21:22:59,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:22:59,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:22:59,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:22:59,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:22:59,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:58" (1/1) ... [2019-11-23 21:22:59,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:58" (1/1) ... [2019-11-23 21:22:59,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:58" (1/1) ... [2019-11-23 21:22:59,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:58" (1/1) ... [2019-11-23 21:22:59,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:58" (1/1) ... [2019-11-23 21:22:59,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:58" (1/1) ... [2019-11-23 21:22:59,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:58" (1/1) ... [2019-11-23 21:22:59,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:22:59,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:22:59,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:22:59,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:22:59,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:58" (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 21:22:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:22:59,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:23:03,475 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:23:03,475 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:23:03,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:03 BoogieIcfgContainer [2019-11-23 21:23:03,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:23:03,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:23:03,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:23:03,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:23:03,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:22:57" (1/3) ... [2019-11-23 21:23:03,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666bc180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:03, skipping insertion in model container [2019-11-23 21:23:03,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:58" (2/3) ... [2019-11-23 21:23:03,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666bc180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:03, skipping insertion in model container [2019-11-23 21:23:03,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:03" (3/3) ... [2019-11-23 21:23:03,486 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label25.c [2019-11-23 21:23:03,497 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:23:03,507 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:23:03,519 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:23:03,561 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:23:03,562 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:23:03,562 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:23:03,562 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:23:03,562 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:23:03,563 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:23:03,563 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:23:03,564 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:23:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:23:03,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 21:23:03,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:03,608 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] [2019-11-23 21:23:03,609 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:03,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:03,615 INFO L82 PathProgramCache]: Analyzing trace with hash -593706766, now seen corresponding path program 1 times [2019-11-23 21:23:03,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:03,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280783437] [2019-11-23 21:23:03,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:03,852 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 21:23:03,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280783437] [2019-11-23 21:23:03,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:03,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:23:03,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883441127] [2019-11-23 21:23:03,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:03,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:03,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:03,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:03,881 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2019-11-23 21:23:11,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:11,434 INFO L93 Difference]: Finished difference Result 2914 states and 5662 transitions. [2019-11-23 21:23:11,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:11,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-11-23 21:23:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:11,482 INFO L225 Difference]: With dead ends: 2914 [2019-11-23 21:23:11,482 INFO L226 Difference]: Without dead ends: 2074 [2019-11-23 21:23:11,495 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 21:23:11,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2019-11-23 21:23:11,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1384. [2019-11-23 21:23:11,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2019-11-23 21:23:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2212 transitions. [2019-11-23 21:23:11,637 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2212 transitions. Word has length 24 [2019-11-23 21:23:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:11,638 INFO L462 AbstractCegarLoop]: Abstraction has 1384 states and 2212 transitions. [2019-11-23 21:23:11,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2212 transitions. [2019-11-23 21:23:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-23 21:23:11,641 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:11,642 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:11,642 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:11,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:11,642 INFO L82 PathProgramCache]: Analyzing trace with hash 395159458, now seen corresponding path program 1 times [2019-11-23 21:23:11,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:11,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354055335] [2019-11-23 21:23:11,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:11,794 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:23:11,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354055335] [2019-11-23 21:23:11,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:11,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:23:11,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650722763] [2019-11-23 21:23:11,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:11,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:11,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:11,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:11,799 INFO L87 Difference]: Start difference. First operand 1384 states and 2212 transitions. Second operand 4 states. [2019-11-23 21:23:16,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:16,383 INFO L93 Difference]: Finished difference Result 4146 states and 6631 transitions. [2019-11-23 21:23:16,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:16,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2019-11-23 21:23:16,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:16,401 INFO L225 Difference]: With dead ends: 4146 [2019-11-23 21:23:16,401 INFO L226 Difference]: Without dead ends: 2764 [2019-11-23 21:23:16,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 21:23:16,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2019-11-23 21:23:16,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2764. [2019-11-23 21:23:16,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2764 states. [2019-11-23 21:23:16,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 3731 transitions. [2019-11-23 21:23:16,467 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 3731 transitions. Word has length 89 [2019-11-23 21:23:16,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:16,468 INFO L462 AbstractCegarLoop]: Abstraction has 2764 states and 3731 transitions. [2019-11-23 21:23:16,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:16,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 3731 transitions. [2019-11-23 21:23:16,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-11-23 21:23:16,479 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:16,479 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:23:16,479 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:16,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:16,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1619547451, now seen corresponding path program 1 times [2019-11-23 21:23:16,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:16,480 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209721939] [2019-11-23 21:23:16,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 21:23:16,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209721939] [2019-11-23 21:23:17,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:17,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:23:17,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118518661] [2019-11-23 21:23:17,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:23:17,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:17,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:23:17,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:23:17,002 INFO L87 Difference]: Start difference. First operand 2764 states and 3731 transitions. Second operand 5 states. [2019-11-23 21:23:23,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:23,658 INFO L93 Difference]: Finished difference Result 8976 states and 11908 transitions. [2019-11-23 21:23:23,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:23,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 207 [2019-11-23 21:23:23,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:23,689 INFO L225 Difference]: With dead ends: 8976 [2019-11-23 21:23:23,690 INFO L226 Difference]: Without dead ends: 6214 [2019-11-23 21:23:23,694 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:23,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6214 states. [2019-11-23 21:23:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6214 to 5524. [2019-11-23 21:23:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5524 states. [2019-11-23 21:23:23,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 6713 transitions. [2019-11-23 21:23:23,818 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 6713 transitions. Word has length 207 [2019-11-23 21:23:23,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:23,819 INFO L462 AbstractCegarLoop]: Abstraction has 5524 states and 6713 transitions. [2019-11-23 21:23:23,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:23:23,819 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 6713 transitions. [2019-11-23 21:23:23,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2019-11-23 21:23:23,827 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:23,827 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:23,828 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:23,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:23,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1360687436, now seen corresponding path program 1 times [2019-11-23 21:23:23,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:23,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617965489] [2019-11-23 21:23:23,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 272 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 21:23:24,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617965489] [2019-11-23 21:23:24,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789905729] [2019-11-23 21:23:24,396 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 21:23:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:24,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:24,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 21:23:24,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:24,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:24,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733703742] [2019-11-23 21:23:24,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:24,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:24,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:24,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:24,792 INFO L87 Difference]: Start difference. First operand 5524 states and 6713 transitions. Second operand 3 states. [2019-11-23 21:23:28,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:28,782 INFO L93 Difference]: Finished difference Result 13806 states and 17181 transitions. [2019-11-23 21:23:28,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:28,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 389 [2019-11-23 21:23:28,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:28,822 INFO L225 Difference]: With dead ends: 13806 [2019-11-23 21:23:28,822 INFO L226 Difference]: Without dead ends: 8284 [2019-11-23 21:23:28,831 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 388 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:28,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8284 states. [2019-11-23 21:23:29,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8284 to 8284. [2019-11-23 21:23:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8284 states. [2019-11-23 21:23:29,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 10152 transitions. [2019-11-23 21:23:29,042 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 10152 transitions. Word has length 389 [2019-11-23 21:23:29,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:29,044 INFO L462 AbstractCegarLoop]: Abstraction has 8284 states and 10152 transitions. [2019-11-23 21:23:29,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:29,044 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 10152 transitions. [2019-11-23 21:23:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2019-11-23 21:23:29,053 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:29,053 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:29,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:29,266 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:29,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:29,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1306502314, now seen corresponding path program 1 times [2019-11-23 21:23:29,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:29,267 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833435899] [2019-11-23 21:23:29,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 276 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 21:23:29,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833435899] [2019-11-23 21:23:29,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116070221] [2019-11-23 21:23:29,977 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 21:23:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:30,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:30,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 21:23:30,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:30,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:30,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143382449] [2019-11-23 21:23:30,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:30,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:30,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:30,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:30,223 INFO L87 Difference]: Start difference. First operand 8284 states and 10152 transitions. Second operand 3 states. [2019-11-23 21:23:33,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:33,938 INFO L93 Difference]: Finished difference Result 20706 states and 25969 transitions. [2019-11-23 21:23:33,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:33,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 393 [2019-11-23 21:23:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:33,993 INFO L225 Difference]: With dead ends: 20706 [2019-11-23 21:23:33,993 INFO L226 Difference]: Without dead ends: 11044 [2019-11-23 21:23:34,006 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 392 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11044 states. [2019-11-23 21:23:34,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11044 to 11044. [2019-11-23 21:23:34,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11044 states. [2019-11-23 21:23:34,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11044 states to 11044 states and 11992 transitions. [2019-11-23 21:23:34,166 INFO L78 Accepts]: Start accepts. Automaton has 11044 states and 11992 transitions. Word has length 393 [2019-11-23 21:23:34,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:34,167 INFO L462 AbstractCegarLoop]: Abstraction has 11044 states and 11992 transitions. [2019-11-23 21:23:34,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:34,167 INFO L276 IsEmpty]: Start isEmpty. Operand 11044 states and 11992 transitions. [2019-11-23 21:23:34,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2019-11-23 21:23:34,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:34,174 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:34,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:34,382 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:34,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:34,383 INFO L82 PathProgramCache]: Analyzing trace with hash -2002169422, now seen corresponding path program 1 times [2019-11-23 21:23:34,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:34,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125729019] [2019-11-23 21:23:34,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 21:23:34,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125729019] [2019-11-23 21:23:34,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:34,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:23:34,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864774777] [2019-11-23 21:23:34,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:34,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:34,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:34,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:34,668 INFO L87 Difference]: Start difference. First operand 11044 states and 11992 transitions. Second operand 4 states. [2019-11-23 21:23:39,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:39,300 INFO L93 Difference]: Finished difference Result 31056 states and 34288 transitions. [2019-11-23 21:23:39,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:39,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 395 [2019-11-23 21:23:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:39,335 INFO L225 Difference]: With dead ends: 31056 [2019-11-23 21:23:39,335 INFO L226 Difference]: Without dead ends: 20014 [2019-11-23 21:23:39,347 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 21:23:39,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20014 states. [2019-11-23 21:23:39,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20014 to 20014. [2019-11-23 21:23:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20014 states. [2019-11-23 21:23:39,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20014 states to 20014 states and 21499 transitions. [2019-11-23 21:23:39,611 INFO L78 Accepts]: Start accepts. Automaton has 20014 states and 21499 transitions. Word has length 395 [2019-11-23 21:23:39,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:39,612 INFO L462 AbstractCegarLoop]: Abstraction has 20014 states and 21499 transitions. [2019-11-23 21:23:39,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:39,612 INFO L276 IsEmpty]: Start isEmpty. Operand 20014 states and 21499 transitions. [2019-11-23 21:23:39,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2019-11-23 21:23:39,619 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:39,629 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:39,629 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:39,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:39,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1486088849, now seen corresponding path program 1 times [2019-11-23 21:23:39,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:39,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107320701] [2019-11-23 21:23:39,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-11-23 21:23:39,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107320701] [2019-11-23 21:23:39,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:39,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:23:39,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870649559] [2019-11-23 21:23:39,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:39,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:39,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:39,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:39,897 INFO L87 Difference]: Start difference. First operand 20014 states and 21499 transitions. Second operand 4 states. [2019-11-23 21:23:44,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:44,718 INFO L93 Difference]: Finished difference Result 69006 states and 74595 transitions. [2019-11-23 21:23:44,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:44,719 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 409 [2019-11-23 21:23:44,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:44,810 INFO L225 Difference]: With dead ends: 69006 [2019-11-23 21:23:44,810 INFO L226 Difference]: Without dead ends: 48994 [2019-11-23 21:23:44,840 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 21:23:44,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48994 states. [2019-11-23 21:23:45,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48994 to 44854. [2019-11-23 21:23:45,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44854 states. [2019-11-23 21:23:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44854 states to 44854 states and 48048 transitions. [2019-11-23 21:23:46,842 INFO L78 Accepts]: Start accepts. Automaton has 44854 states and 48048 transitions. Word has length 409 [2019-11-23 21:23:46,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:46,843 INFO L462 AbstractCegarLoop]: Abstraction has 44854 states and 48048 transitions. [2019-11-23 21:23:46,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 44854 states and 48048 transitions. [2019-11-23 21:23:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2019-11-23 21:23:46,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:46,854 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:23:46,855 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:46,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:46,855 INFO L82 PathProgramCache]: Analyzing trace with hash -965090732, now seen corresponding path program 1 times [2019-11-23 21:23:46,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:46,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356061498] [2019-11-23 21:23:46,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 21:23:47,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356061498] [2019-11-23 21:23:47,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:47,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:23:47,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653495030] [2019-11-23 21:23:47,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:47,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:47,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:47,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:47,248 INFO L87 Difference]: Start difference. First operand 44854 states and 48048 transitions. Second operand 4 states. [2019-11-23 21:23:52,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:52,096 INFO L93 Difference]: Finished difference Result 115926 states and 124808 transitions. [2019-11-23 21:23:52,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:52,097 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 643 [2019-11-23 21:23:52,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:52,182 INFO L225 Difference]: With dead ends: 115926 [2019-11-23 21:23:52,182 INFO L226 Difference]: Without dead ends: 71764 [2019-11-23 21:23:52,221 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 21:23:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71764 states. [2019-11-23 21:23:52,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71764 to 69694. [2019-11-23 21:23:52,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69694 states. [2019-11-23 21:23:54,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69694 states to 69694 states and 74093 transitions. [2019-11-23 21:23:54,605 INFO L78 Accepts]: Start accepts. Automaton has 69694 states and 74093 transitions. Word has length 643 [2019-11-23 21:23:54,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:54,606 INFO L462 AbstractCegarLoop]: Abstraction has 69694 states and 74093 transitions. [2019-11-23 21:23:54,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:54,606 INFO L276 IsEmpty]: Start isEmpty. Operand 69694 states and 74093 transitions. [2019-11-23 21:23:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2019-11-23 21:23:54,621 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:54,622 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:54,622 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:54,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:54,623 INFO L82 PathProgramCache]: Analyzing trace with hash -901220792, now seen corresponding path program 1 times [2019-11-23 21:23:54,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:54,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975066229] [2019-11-23 21:23:54,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 503 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 21:23:55,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975066229] [2019-11-23 21:23:55,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:55,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:23:55,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300640100] [2019-11-23 21:23:55,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:55,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:55,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:55,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:55,013 INFO L87 Difference]: Start difference. First operand 69694 states and 74093 transitions. Second operand 4 states. [2019-11-23 21:23:59,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:59,666 INFO L93 Difference]: Finished difference Result 142146 states and 151017 transitions. [2019-11-23 21:23:59,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:59,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 685 [2019-11-23 21:23:59,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:59,744 INFO L225 Difference]: With dead ends: 142146 [2019-11-23 21:23:59,744 INFO L226 Difference]: Without dead ends: 73144 [2019-11-23 21:23:59,779 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 21:23:59,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73144 states. [2019-11-23 21:24:00,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73144 to 72454. [2019-11-23 21:24:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72454 states. [2019-11-23 21:24:00,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72454 states to 72454 states and 76425 transitions. [2019-11-23 21:24:00,374 INFO L78 Accepts]: Start accepts. Automaton has 72454 states and 76425 transitions. Word has length 685 [2019-11-23 21:24:00,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:00,375 INFO L462 AbstractCegarLoop]: Abstraction has 72454 states and 76425 transitions. [2019-11-23 21:24:00,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:24:00,375 INFO L276 IsEmpty]: Start isEmpty. Operand 72454 states and 76425 transitions. [2019-11-23 21:24:00,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1245 [2019-11-23 21:24:00,400 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:00,402 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:24:00,402 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:00,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:00,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1988213891, now seen corresponding path program 1 times [2019-11-23 21:24:00,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:00,403 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062398905] [2019-11-23 21:24:00,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 955 proven. 0 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2019-11-23 21:24:01,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062398905] [2019-11-23 21:24:01,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:01,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:24:01,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87184541] [2019-11-23 21:24:01,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:01,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:01,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:01,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:01,870 INFO L87 Difference]: Start difference. First operand 72454 states and 76425 transitions. Second operand 4 states. [2019-11-23 21:24:06,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:06,622 INFO L93 Difference]: Finished difference Result 164916 states and 174792 transitions. [2019-11-23 21:24:06,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:06,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1244 [2019-11-23 21:24:06,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:06,716 INFO L225 Difference]: With dead ends: 164916 [2019-11-23 21:24:06,717 INFO L226 Difference]: Without dead ends: 93154 [2019-11-23 21:24:06,760 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 21:24:06,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93154 states. [2019-11-23 21:24:07,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93154 to 86944. [2019-11-23 21:24:07,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86944 states. [2019-11-23 21:24:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86944 states to 86944 states and 91727 transitions. [2019-11-23 21:24:07,445 INFO L78 Accepts]: Start accepts. Automaton has 86944 states and 91727 transitions. Word has length 1244 [2019-11-23 21:24:07,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:07,446 INFO L462 AbstractCegarLoop]: Abstraction has 86944 states and 91727 transitions. [2019-11-23 21:24:07,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:24:07,446 INFO L276 IsEmpty]: Start isEmpty. Operand 86944 states and 91727 transitions. [2019-11-23 21:24:07,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1253 [2019-11-23 21:24:07,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:07,465 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 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 21:24:07,466 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:07,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:07,466 INFO L82 PathProgramCache]: Analyzing trace with hash -322963830, now seen corresponding path program 1 times [2019-11-23 21:24:07,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:07,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881914979] [2019-11-23 21:24:07,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1754 backedges. 645 proven. 4 refuted. 0 times theorem prover too weak. 1105 trivial. 0 not checked. [2019-11-23 21:24:09,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881914979] [2019-11-23 21:24:09,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719468189] [2019-11-23 21:24:09,046 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 21:24:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:09,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:09,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1754 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 1623 trivial. 0 not checked. [2019-11-23 21:24:10,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:10,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-11-23 21:24:10,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922857] [2019-11-23 21:24:10,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:10,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:10,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:10,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:24:10,627 INFO L87 Difference]: Start difference. First operand 86944 states and 91727 transitions. Second operand 3 states.