/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_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:25:29,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:25:29,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:25:29,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 21:25:29,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 21:25:29,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 21:25:29,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 21:25:29,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 21:25:29,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 21:25:29,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 21:25:29,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 21:25:29,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 21:25:29,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:25:29,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:25:29,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:25:29,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:25:29,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:25:29,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:25:29,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:25:29,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:25:29,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:25:29,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:25:29,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:25:29,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:25:29,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:25:29,931 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 21:25:29,950 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:25:29,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:25:29,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:25:29,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:25:29,956 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:25:29,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:25:29,957 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:25:29,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:25:29,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:25:29,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:25:29,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:25:29,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:25:29,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:25:29,959 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:25:29,959 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:25:29,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:25:29,960 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:25:29,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:25:29,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:25:29,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:25:29,960 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:25:29,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:25:29,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:25:29,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:25:29,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:25:29,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:25:29,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:25:29,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:25:29,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:25:29,963 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:25:30,246 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:25:30,259 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:25:30,262 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:25:30,263 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:25:30,264 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:25:30,264 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label59.c [2019-11-23 21:25:30,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c5589738/4eba5aa55b794344b5c7d96bb12b1147/FLAGbfdefd903 [2019-11-23 21:25:31,014 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:25:31,014 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label59.c [2019-11-23 21:25:31,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c5589738/4eba5aa55b794344b5c7d96bb12b1147/FLAGbfdefd903 [2019-11-23 21:25:31,155 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c5589738/4eba5aa55b794344b5c7d96bb12b1147 [2019-11-23 21:25:31,166 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:25:31,168 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:25:31,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:25:31,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:25:31,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:25:31,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:25:31" (1/1) ... [2019-11-23 21:25:31,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e0f5e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:25:31, skipping insertion in model container [2019-11-23 21:25:31,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:25:31" (1/1) ... [2019-11-23 21:25:31,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:25:31,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:25:32,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:25:32,613 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:25:33,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:25:33,102 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:25:33,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:25:33 WrapperNode [2019-11-23 21:25:33,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:25:33,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:25:33,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:25:33,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:25:33,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:25:33" (1/1) ... [2019-11-23 21:25:33,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:25:33" (1/1) ... [2019-11-23 21:25:33,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:25:33,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:25:33,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:25:33,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:25:33,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:25:33" (1/1) ... [2019-11-23 21:25:33,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:25:33" (1/1) ... [2019-11-23 21:25:33,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:25:33" (1/1) ... [2019-11-23 21:25:33,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:25:33" (1/1) ... [2019-11-23 21:25:33,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:25:33" (1/1) ... [2019-11-23 21:25:33,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:25:33" (1/1) ... [2019-11-23 21:25:33,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:25:33" (1/1) ... [2019-11-23 21:25:33,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:25:33,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:25:33,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:25:33,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:25:33,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:25:33" (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 21:25:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:25:33,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:25:37,533 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:25:37,533 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:25:37,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:25:37 BoogieIcfgContainer [2019-11-23 21:25:37,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:25:37,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:25:37,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:25:37,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:25:37,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:25:31" (1/3) ... [2019-11-23 21:25:37,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55cffee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:25:37, skipping insertion in model container [2019-11-23 21:25:37,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:25:33" (2/3) ... [2019-11-23 21:25:37,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55cffee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:25:37, skipping insertion in model container [2019-11-23 21:25:37,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:25:37" (3/3) ... [2019-11-23 21:25:37,548 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label59.c [2019-11-23 21:25:37,558 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:25:37,568 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:25:37,579 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:25:37,625 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:25:37,625 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:25:37,625 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:25:37,625 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:25:37,626 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:25:37,626 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:25:37,626 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:25:37,626 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:25:37,656 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:25:37,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 21:25:37,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:37,665 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] [2019-11-23 21:25:37,666 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:37,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:37,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2088660649, now seen corresponding path program 1 times [2019-11-23 21:25:37,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:37,682 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204325660] [2019-11-23 21:25:37,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:38,030 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 21:25:38,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204325660] [2019-11-23 21:25:38,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:38,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:25:38,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278561416] [2019-11-23 21:25:38,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:38,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:38,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:38,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:38,057 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2019-11-23 21:25:45,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:45,222 INFO L93 Difference]: Finished difference Result 2898 states and 5646 transitions. [2019-11-23 21:25:45,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:45,224 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2019-11-23 21:25:45,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:45,265 INFO L225 Difference]: With dead ends: 2898 [2019-11-23 21:25:45,265 INFO L226 Difference]: Without dead ends: 2074 [2019-11-23 21:25:45,272 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 21:25:45,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2019-11-23 21:25:45,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2019-11-23 21:25:45,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-23 21:25:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3550 transitions. [2019-11-23 21:25:45,437 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3550 transitions. Word has length 37 [2019-11-23 21:25:45,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:45,438 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3550 transitions. [2019-11-23 21:25:45,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:45,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3550 transitions. [2019-11-23 21:25:45,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-23 21:25:45,445 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:45,446 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:25:45,447 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:45,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:45,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1863761702, now seen corresponding path program 1 times [2019-11-23 21:25:45,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:45,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203709989] [2019-11-23 21:25:45,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:25:45,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203709989] [2019-11-23 21:25:45,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:45,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:25:45,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303019438] [2019-11-23 21:25:45,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:45,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:45,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:45,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:45,629 INFO L87 Difference]: Start difference. First operand 2074 states and 3550 transitions. Second operand 4 states. [2019-11-23 21:25:49,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:49,971 INFO L93 Difference]: Finished difference Result 6216 states and 10645 transitions. [2019-11-23 21:25:49,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:25:49,972 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2019-11-23 21:25:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:49,995 INFO L225 Difference]: With dead ends: 6216 [2019-11-23 21:25:49,995 INFO L226 Difference]: Without dead ends: 4144 [2019-11-23 21:25:49,999 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 21:25:50,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2019-11-23 21:25:50,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4144. [2019-11-23 21:25:50,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4144 states. [2019-11-23 21:25:50,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5879 transitions. [2019-11-23 21:25:50,083 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5879 transitions. Word has length 102 [2019-11-23 21:25:50,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:50,084 INFO L462 AbstractCegarLoop]: Abstraction has 4144 states and 5879 transitions. [2019-11-23 21:25:50,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:50,085 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5879 transitions. [2019-11-23 21:25:50,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-23 21:25:50,092 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:50,092 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:25:50,093 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:50,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:50,093 INFO L82 PathProgramCache]: Analyzing trace with hash 117951620, now seen corresponding path program 1 times [2019-11-23 21:25:50,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:50,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907082162] [2019-11-23 21:25:50,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:25:50,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907082162] [2019-11-23 21:25:50,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:50,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:25:50,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132094650] [2019-11-23 21:25:50,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:50,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:50,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:50,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:50,251 INFO L87 Difference]: Start difference. First operand 4144 states and 5879 transitions. Second operand 4 states. [2019-11-23 21:25:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:56,241 INFO L93 Difference]: Finished difference Result 15878 states and 22771 transitions. [2019-11-23 21:25:56,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:56,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2019-11-23 21:25:56,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:56,285 INFO L225 Difference]: With dead ends: 15878 [2019-11-23 21:25:56,285 INFO L226 Difference]: Without dead ends: 11736 [2019-11-23 21:25:56,292 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 21:25:56,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11736 states. [2019-11-23 21:25:56,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11736 to 8284. [2019-11-23 21:25:56,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8284 states. [2019-11-23 21:25:56,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 10555 transitions. [2019-11-23 21:25:56,496 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 10555 transitions. Word has length 105 [2019-11-23 21:25:56,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:56,497 INFO L462 AbstractCegarLoop]: Abstraction has 8284 states and 10555 transitions. [2019-11-23 21:25:56,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:56,497 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 10555 transitions. [2019-11-23 21:25:56,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-23 21:25:56,499 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:56,499 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:25:56,500 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:56,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:56,500 INFO L82 PathProgramCache]: Analyzing trace with hash 497433312, now seen corresponding path program 1 times [2019-11-23 21:25:56,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:56,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472647404] [2019-11-23 21:25:56,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:25:56,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472647404] [2019-11-23 21:25:56,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:56,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:25:56,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114682880] [2019-11-23 21:25:56,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:25:56,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:56,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:25:56,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:25:56,900 INFO L87 Difference]: Start difference. First operand 8284 states and 10555 transitions. Second operand 5 states. [2019-11-23 21:26:02,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:26:02,865 INFO L93 Difference]: Finished difference Result 22086 states and 27894 transitions. [2019-11-23 21:26:02,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:26:02,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-11-23 21:26:02,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:26:02,936 INFO L225 Difference]: With dead ends: 22086 [2019-11-23 21:26:02,936 INFO L226 Difference]: Without dead ends: 13804 [2019-11-23 21:26:02,946 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:26:02,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13804 states. [2019-11-23 21:26:03,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13804 to 13114. [2019-11-23 21:26:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13114 states. [2019-11-23 21:26:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13114 states to 13114 states and 15691 transitions. [2019-11-23 21:26:03,277 INFO L78 Accepts]: Start accepts. Automaton has 13114 states and 15691 transitions. Word has length 130 [2019-11-23 21:26:03,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:26:03,279 INFO L462 AbstractCegarLoop]: Abstraction has 13114 states and 15691 transitions. [2019-11-23 21:26:03,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:26:03,279 INFO L276 IsEmpty]: Start isEmpty. Operand 13114 states and 15691 transitions. [2019-11-23 21:26:03,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-11-23 21:26:03,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:26:03,282 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:26:03,282 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:26:03,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:26:03,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1014438111, now seen corresponding path program 1 times [2019-11-23 21:26:03,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:26:03,285 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957168644] [2019-11-23 21:26:03,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:26:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:26:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:26:03,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957168644] [2019-11-23 21:26:03,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:26:03,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:26:03,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500180985] [2019-11-23 21:26:03,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:26:03,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:26:03,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:26:03,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:26:03,464 INFO L87 Difference]: Start difference. First operand 13114 states and 15691 transitions. Second operand 4 states. [2019-11-23 21:26:07,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:26:07,580 INFO L93 Difference]: Finished difference Result 32436 states and 39778 transitions. [2019-11-23 21:26:07,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:26:07,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 219 [2019-11-23 21:26:07,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:26:07,611 INFO L225 Difference]: With dead ends: 32436 [2019-11-23 21:26:07,612 INFO L226 Difference]: Without dead ends: 16564 [2019-11-23 21:26:07,625 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 21:26:07,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16564 states. [2019-11-23 21:26:07,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16564 to 16564. [2019-11-23 21:26:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16564 states. [2019-11-23 21:26:07,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16564 states to 16564 states and 17888 transitions. [2019-11-23 21:26:07,843 INFO L78 Accepts]: Start accepts. Automaton has 16564 states and 17888 transitions. Word has length 219 [2019-11-23 21:26:07,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:26:07,844 INFO L462 AbstractCegarLoop]: Abstraction has 16564 states and 17888 transitions. [2019-11-23 21:26:07,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:26:07,844 INFO L276 IsEmpty]: Start isEmpty. Operand 16564 states and 17888 transitions. [2019-11-23 21:26:07,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 992 [2019-11-23 21:26:07,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:26:07,875 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:26:07,876 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:26:07,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:26:07,876 INFO L82 PathProgramCache]: Analyzing trace with hash -472098479, now seen corresponding path program 1 times [2019-11-23 21:26:07,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:26:07,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382515893] [2019-11-23 21:26:07,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:26:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:26:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-11-23 21:26:08,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382515893] [2019-11-23 21:26:08,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:26:08,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:26:08,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349294655] [2019-11-23 21:26:08,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:26:08,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:26:08,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:26:08,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:26:08,830 INFO L87 Difference]: Start difference. First operand 16564 states and 17888 transitions. Second operand 4 states. [2019-11-23 21:26:13,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:26:13,185 INFO L93 Difference]: Finished difference Result 46236 states and 50825 transitions. [2019-11-23 21:26:13,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:26:13,186 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 991 [2019-11-23 21:26:13,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:26:13,228 INFO L225 Difference]: With dead ends: 46236 [2019-11-23 21:26:13,228 INFO L226 Difference]: Without dead ends: 30364 [2019-11-23 21:26:13,247 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 21:26:13,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30364 states. [2019-11-23 21:26:13,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30364 to 28984. [2019-11-23 21:26:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28984 states. [2019-11-23 21:26:13,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28984 states to 28984 states and 31084 transitions. [2019-11-23 21:26:13,592 INFO L78 Accepts]: Start accepts. Automaton has 28984 states and 31084 transitions. Word has length 991 [2019-11-23 21:26:13,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:26:13,596 INFO L462 AbstractCegarLoop]: Abstraction has 28984 states and 31084 transitions. [2019-11-23 21:26:13,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:26:13,596 INFO L276 IsEmpty]: Start isEmpty. Operand 28984 states and 31084 transitions. [2019-11-23 21:26:13,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1006 [2019-11-23 21:26:13,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:26:13,637 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:26:13,637 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:26:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:26:13,638 INFO L82 PathProgramCache]: Analyzing trace with hash -2013784972, now seen corresponding path program 1 times [2019-11-23 21:26:13,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:26:13,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617888059] [2019-11-23 21:26:13,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:26:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:26:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-23 21:26:15,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617888059] [2019-11-23 21:26:15,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:26:15,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:26:15,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838565053] [2019-11-23 21:26:15,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:26:15,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:26:15,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:26:15,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:26:15,830 INFO L87 Difference]: Start difference. First operand 28984 states and 31084 transitions. Second operand 3 states. [2019-11-23 21:26:18,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:26:18,509 INFO L93 Difference]: Finished difference Result 57276 states and 61475 transitions. [2019-11-23 21:26:18,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:26:18,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1005 [2019-11-23 21:26:18,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:26:18,570 INFO L225 Difference]: With dead ends: 57276 [2019-11-23 21:26:18,570 INFO L226 Difference]: Without dead ends: 28984 [2019-11-23 21:26:18,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:26:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28984 states. [2019-11-23 21:26:18,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28984 to 28984. [2019-11-23 21:26:18,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28984 states. [2019-11-23 21:26:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28984 states to 28984 states and 30856 transitions. [2019-11-23 21:26:18,952 INFO L78 Accepts]: Start accepts. Automaton has 28984 states and 30856 transitions. Word has length 1005 [2019-11-23 21:26:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:26:18,955 INFO L462 AbstractCegarLoop]: Abstraction has 28984 states and 30856 transitions. [2019-11-23 21:26:18,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:26:18,955 INFO L276 IsEmpty]: Start isEmpty. Operand 28984 states and 30856 transitions. [2019-11-23 21:26:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1137 [2019-11-23 21:26:18,975 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:26:18,978 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:26:18,978 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:26:18,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:26:18,979 INFO L82 PathProgramCache]: Analyzing trace with hash 723738100, now seen corresponding path program 1 times [2019-11-23 21:26:18,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:26:18,980 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424553944] [2019-11-23 21:26:18,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:26:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:26:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 757 proven. 0 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2019-11-23 21:26:20,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424553944] [2019-11-23 21:26:20,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:26:20,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:26:20,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133083935] [2019-11-23 21:26:20,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:26:20,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:26:20,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:26:20,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:26:20,341 INFO L87 Difference]: Start difference. First operand 28984 states and 30856 transitions. Second operand 4 states. [2019-11-23 21:26:25,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:26:25,408 INFO L93 Difference]: Finished difference Result 80736 states and 86051 transitions. [2019-11-23 21:26:25,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:26:25,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1136 [2019-11-23 21:26:25,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:26:25,469 INFO L225 Difference]: With dead ends: 80736 [2019-11-23 21:26:25,469 INFO L226 Difference]: Without dead ends: 52444 [2019-11-23 21:26:25,496 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 21:26:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52444 states. [2019-11-23 21:26:25,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52444 to 48304. [2019-11-23 21:26:25,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48304 states. [2019-11-23 21:26:27,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48304 states to 48304 states and 51009 transitions. [2019-11-23 21:26:27,295 INFO L78 Accepts]: Start accepts. Automaton has 48304 states and 51009 transitions. Word has length 1136 [2019-11-23 21:26:27,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:26:27,296 INFO L462 AbstractCegarLoop]: Abstraction has 48304 states and 51009 transitions. [2019-11-23 21:26:27,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:26:27,296 INFO L276 IsEmpty]: Start isEmpty. Operand 48304 states and 51009 transitions. [2019-11-23 21:26:27,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1170 [2019-11-23 21:26:27,315 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:26:27,316 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:26:27,317 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:26:27,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:26:27,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1236239137, now seen corresponding path program 1 times [2019-11-23 21:26:27,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:26:27,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614216918] [2019-11-23 21:26:27,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:26:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:26:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2019-11-23 21:26:28,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614216918] [2019-11-23 21:26:28,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:26:28,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:26:28,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907947559] [2019-11-23 21:26:28,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:26:28,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:26:28,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:26:28,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:26:28,597 INFO L87 Difference]: Start difference. First operand 48304 states and 51009 transitions. Second operand 3 states. [2019-11-23 21:26:31,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:26:31,427 INFO L93 Difference]: Finished difference Result 105576 states and 111880 transitions. [2019-11-23 21:26:31,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:26:31,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1169 [2019-11-23 21:26:31,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:26:31,478 INFO L225 Difference]: With dead ends: 105576 [2019-11-23 21:26:31,478 INFO L226 Difference]: Without dead ends: 57964 [2019-11-23 21:26:31,511 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:26:31,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57964 states. [2019-11-23 21:26:32,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57964 to 56584. [2019-11-23 21:26:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56584 states. [2019-11-23 21:26:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56584 states to 56584 states and 59409 transitions. [2019-11-23 21:26:32,144 INFO L78 Accepts]: Start accepts. Automaton has 56584 states and 59409 transitions. Word has length 1169 [2019-11-23 21:26:32,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:26:32,145 INFO L462 AbstractCegarLoop]: Abstraction has 56584 states and 59409 transitions. [2019-11-23 21:26:32,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:26:32,145 INFO L276 IsEmpty]: Start isEmpty. Operand 56584 states and 59409 transitions. [2019-11-23 21:26:32,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1237 [2019-11-23 21:26:32,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:26:32,172 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:26:32,172 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:26:32,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:26:32,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1691996160, now seen corresponding path program 1 times [2019-11-23 21:26:32,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:26:32,173 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194099970] [2019-11-23 21:26:32,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:26:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:26:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1487 backedges. 732 proven. 6 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2019-11-23 21:26:33,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194099970] [2019-11-23 21:26:33,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165890191] [2019-11-23 21:26:33,624 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 21:26:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:26:33,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:26:33,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:26:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1487 backedges. 732 proven. 0 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2019-11-23 21:26:35,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:26:35,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2019-11-23 21:26:35,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466518501] [2019-11-23 21:26:35,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:26:35,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:26:35,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:26:35,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:26:35,830 INFO L87 Difference]: Start difference. First operand 56584 states and 59409 transitions. Second operand 3 states. [2019-11-23 21:26:38,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:26:38,513 INFO L93 Difference]: Finished difference Result 112476 states and 118125 transitions. [2019-11-23 21:26:38,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:26:38,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1236 [2019-11-23 21:26:38,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:26:38,619 INFO L225 Difference]: With dead ends: 112476 [2019-11-23 21:26:38,620 INFO L226 Difference]: Without dead ends: 56584 [2019-11-23 21:26:38,656 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1238 GetRequests, 1235 SyntacticMatches, 0 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 21:26:38,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56584 states. [2019-11-23 21:26:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56584 to 54514. [2019-11-23 21:26:39,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54514 states. [2019-11-23 21:26:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54514 states to 54514 states and 57087 transitions. [2019-11-23 21:26:39,609 INFO L78 Accepts]: Start accepts. Automaton has 54514 states and 57087 transitions. Word has length 1236 [2019-11-23 21:26:39,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:26:39,610 INFO L462 AbstractCegarLoop]: Abstraction has 54514 states and 57087 transitions. [2019-11-23 21:26:39,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:26:39,610 INFO L276 IsEmpty]: Start isEmpty. Operand 54514 states and 57087 transitions. [2019-11-23 21:26:39,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1251 [2019-11-23 21:26:39,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:26:39,637 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:26:39,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:26:39,844 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:26:39,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:26:39,844 INFO L82 PathProgramCache]: Analyzing trace with hash 18771133, now seen corresponding path program 1 times [2019-11-23 21:26:39,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:26:39,845 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638750509] [2019-11-23 21:26:39,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:26:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:26:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1543 backedges. 573 proven. 693 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2019-11-23 21:26:43,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638750509] [2019-11-23 21:26:43,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214550942] [2019-11-23 21:26:43,276 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 21:26:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:26:43,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 1431 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:26:43,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:26:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1543 backedges. 781 proven. 0 refuted. 0 times theorem prover too weak. 762 trivial. 0 not checked. [2019-11-23 21:26:44,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:26:44,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2019-11-23 21:26:44,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019905563] [2019-11-23 21:26:44,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:26:44,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:26:44,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:26:44,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:26:44,659 INFO L87 Difference]: Start difference. First operand 54514 states and 57087 transitions. Second operand 3 states. [2019-11-23 21:26:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:26:47,479 INFO L93 Difference]: Finished difference Result 124206 states and 130949 transitions. [2019-11-23 21:26:47,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:26:47,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1250 [2019-11-23 21:26:47,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:26:47,558 INFO L225 Difference]: With dead ends: 124206 [2019-11-23 21:26:47,558 INFO L226 Difference]: Without dead ends: 64864 [2019-11-23 21:26:47,596 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1260 GetRequests, 1251 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:26:47,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64864 states. [2019-11-23 21:26:48,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64864 to 64864. [2019-11-23 21:26:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64864 states.