/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_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:23:27,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:23:27,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:23:27,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:23:27,901 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 21:23:27,926 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:23:27,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:23:27,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:23:27,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:23:27,929 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:23:27,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:23:27,930 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:23:27,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:23:27,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:23:27,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:23:27,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:23:27,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:23:27,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:23:27,933 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:23:27,933 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:23:27,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:23:27,933 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:23:27,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:23:27,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:23:27,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:23:27,934 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:23:27,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:23:27,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:23:27,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:23:27,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:23:27,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:23:27,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:23:27,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:23:27,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:23:27,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:23:28,223 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:23:28,237 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:23:28,240 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:23:28,241 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:23:28,241 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:23:28,242 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label37.c [2019-11-23 21:23:28,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9004b9166/d00583091aa44d4984d45ac03912cd41/FLAGb3e676a1d [2019-11-23 21:23:29,020 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:23:29,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label37.c [2019-11-23 21:23:29,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9004b9166/d00583091aa44d4984d45ac03912cd41/FLAGb3e676a1d [2019-11-23 21:23:29,158 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9004b9166/d00583091aa44d4984d45ac03912cd41 [2019-11-23 21:23:29,169 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:23:29,171 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:23:29,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:23:29,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:23:29,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:23:29,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:29" (1/1) ... [2019-11-23 21:23:29,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab7ede9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:29, skipping insertion in model container [2019-11-23 21:23:29,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:29" (1/1) ... [2019-11-23 21:23:29,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:23:29,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:23:30,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:23:30,591 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:23:31,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:23:31,137 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:23:31,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:31 WrapperNode [2019-11-23 21:23:31,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:23:31,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:23:31,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:23:31,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:23:31,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:31" (1/1) ... [2019-11-23 21:23:31,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:31" (1/1) ... [2019-11-23 21:23:31,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:23:31,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:23:31,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:23:31,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:23:31,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:31" (1/1) ... [2019-11-23 21:23:31,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:31" (1/1) ... [2019-11-23 21:23:31,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:31" (1/1) ... [2019-11-23 21:23:31,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:31" (1/1) ... [2019-11-23 21:23:31,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:31" (1/1) ... [2019-11-23 21:23:31,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:31" (1/1) ... [2019-11-23 21:23:31,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:31" (1/1) ... [2019-11-23 21:23:31,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:23:31,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:23:31,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:23:31,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:23:31,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:31" (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 21:23:31,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:23:31,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:23:35,622 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:23:35,622 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:23:35,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:35 BoogieIcfgContainer [2019-11-23 21:23:35,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:23:35,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:23:35,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:23:35,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:23:35,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:23:29" (1/3) ... [2019-11-23 21:23:35,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c15e5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:35, skipping insertion in model container [2019-11-23 21:23:35,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:31" (2/3) ... [2019-11-23 21:23:35,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c15e5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:35, skipping insertion in model container [2019-11-23 21:23:35,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:35" (3/3) ... [2019-11-23 21:23:35,636 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label37.c [2019-11-23 21:23:35,646 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:23:35,656 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:23:35,668 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:23:35,712 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:23:35,712 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:23:35,712 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:23:35,713 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:23:35,713 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:23:35,714 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:23:35,714 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:23:35,714 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:23:35,753 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:23:35,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 21:23:35,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:35,765 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:35,766 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:35,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:35,772 INFO L82 PathProgramCache]: Analyzing trace with hash -2158734, now seen corresponding path program 1 times [2019-11-23 21:23:35,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:35,783 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024935200] [2019-11-23 21:23:35,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:36,082 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 21:23:36,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024935200] [2019-11-23 21:23:36,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:36,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:23:36,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366198225] [2019-11-23 21:23:36,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:36,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:36,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:36,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:36,110 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2019-11-23 21:23:43,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:43,122 INFO L93 Difference]: Finished difference Result 2898 states and 5646 transitions. [2019-11-23 21:23:43,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:43,124 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2019-11-23 21:23:43,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:43,160 INFO L225 Difference]: With dead ends: 2898 [2019-11-23 21:23:43,161 INFO L226 Difference]: Without dead ends: 2074 [2019-11-23 21:23:43,168 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 21:23:43,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2019-11-23 21:23:43,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2019-11-23 21:23:43,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-23 21:23:43,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3550 transitions. [2019-11-23 21:23:43,309 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3550 transitions. Word has length 56 [2019-11-23 21:23:43,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:43,309 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3550 transitions. [2019-11-23 21:23:43,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:43,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3550 transitions. [2019-11-23 21:23:43,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-23 21:23:43,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:43,318 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 21:23:43,319 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:43,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:43,320 INFO L82 PathProgramCache]: Analyzing trace with hash 758459502, now seen corresponding path program 1 times [2019-11-23 21:23:43,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:43,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165547846] [2019-11-23 21:23:43,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:23:43,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165547846] [2019-11-23 21:23:43,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:43,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:23:43,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657205457] [2019-11-23 21:23:43,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:43,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:43,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:43,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:43,601 INFO L87 Difference]: Start difference. First operand 2074 states and 3550 transitions. Second operand 4 states. [2019-11-23 21:23:49,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:49,069 INFO L93 Difference]: Finished difference Result 8286 states and 14192 transitions. [2019-11-23 21:23:49,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:49,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-11-23 21:23:49,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:49,110 INFO L225 Difference]: With dead ends: 8286 [2019-11-23 21:23:49,111 INFO L226 Difference]: Without dead ends: 6214 [2019-11-23 21:23:49,115 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 21:23:49,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6214 states. [2019-11-23 21:23:49,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6214 to 6214. [2019-11-23 21:23:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6214 states. [2019-11-23 21:23:49,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 8928 transitions. [2019-11-23 21:23:49,240 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 8928 transitions. Word has length 140 [2019-11-23 21:23:49,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:49,244 INFO L462 AbstractCegarLoop]: Abstraction has 6214 states and 8928 transitions. [2019-11-23 21:23:49,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 8928 transitions. [2019-11-23 21:23:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-11-23 21:23:49,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:49,251 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:49,252 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:49,252 INFO L82 PathProgramCache]: Analyzing trace with hash -351927467, now seen corresponding path program 1 times [2019-11-23 21:23:49,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:49,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853938705] [2019-11-23 21:23:49,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-23 21:23:49,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853938705] [2019-11-23 21:23:49,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:49,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:23:49,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987227935] [2019-11-23 21:23:49,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:49,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:49,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:49,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:49,488 INFO L87 Difference]: Start difference. First operand 6214 states and 8928 transitions. Second operand 4 states. [2019-11-23 21:23:55,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:55,647 INFO L93 Difference]: Finished difference Result 22776 states and 33003 transitions. [2019-11-23 21:23:55,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:55,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 194 [2019-11-23 21:23:55,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:55,728 INFO L225 Difference]: With dead ends: 22776 [2019-11-23 21:23:55,728 INFO L226 Difference]: Without dead ends: 16564 [2019-11-23 21:23:55,739 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 21:23:55,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16564 states. [2019-11-23 21:23:56,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16564 to 11734. [2019-11-23 21:23:56,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11734 states. [2019-11-23 21:23:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11734 states to 11734 states and 15282 transitions. [2019-11-23 21:23:56,175 INFO L78 Accepts]: Start accepts. Automaton has 11734 states and 15282 transitions. Word has length 194 [2019-11-23 21:23:56,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:56,177 INFO L462 AbstractCegarLoop]: Abstraction has 11734 states and 15282 transitions. [2019-11-23 21:23:56,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:56,183 INFO L276 IsEmpty]: Start isEmpty. Operand 11734 states and 15282 transitions. [2019-11-23 21:23:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2019-11-23 21:23:56,190 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:56,191 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:56,191 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:56,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:56,192 INFO L82 PathProgramCache]: Analyzing trace with hash 293113542, now seen corresponding path program 1 times [2019-11-23 21:23:56,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:56,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580952951] [2019-11-23 21:23:56,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-23 21:23:56,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580952951] [2019-11-23 21:23:56,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:56,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:23:56,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810427296] [2019-11-23 21:23:56,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:23:56,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:56,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:23:56,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:23:56,653 INFO L87 Difference]: Start difference. First operand 11734 states and 15282 transitions. Second operand 5 states. [2019-11-23 21:24:02,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:02,835 INFO L93 Difference]: Finished difference Result 32436 states and 42006 transitions. [2019-11-23 21:24:02,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:02,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 264 [2019-11-23 21:24:02,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:02,881 INFO L225 Difference]: With dead ends: 32436 [2019-11-23 21:24:02,881 INFO L226 Difference]: Without dead ends: 20704 [2019-11-23 21:24:02,895 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 21:24:02,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20704 states. [2019-11-23 21:24:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20704 to 18634. [2019-11-23 21:24:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18634 states. [2019-11-23 21:24:03,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18634 states to 18634 states and 22686 transitions. [2019-11-23 21:24:03,136 INFO L78 Accepts]: Start accepts. Automaton has 18634 states and 22686 transitions. Word has length 264 [2019-11-23 21:24:03,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:03,137 INFO L462 AbstractCegarLoop]: Abstraction has 18634 states and 22686 transitions. [2019-11-23 21:24:03,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:24:03,137 INFO L276 IsEmpty]: Start isEmpty. Operand 18634 states and 22686 transitions. [2019-11-23 21:24:03,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2019-11-23 21:24:03,145 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:03,146 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 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 21:24:03,146 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:03,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:03,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1260069229, now seen corresponding path program 1 times [2019-11-23 21:24:03,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:03,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936861679] [2019-11-23 21:24:03,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 358 proven. 3 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-23 21:24:03,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936861679] [2019-11-23 21:24:03,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025457450] [2019-11-23 21:24:03,750 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 21:24:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:04,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:04,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 21:24:04,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:04,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:24:04,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621311429] [2019-11-23 21:24:04,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:04,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:04,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:04,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:04,230 INFO L87 Difference]: Start difference. First operand 18634 states and 22686 transitions. Second operand 3 states. [2019-11-23 21:24:08,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:08,295 INFO L93 Difference]: Finished difference Result 43476 states and 53242 transitions. [2019-11-23 21:24:08,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:08,296 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 446 [2019-11-23 21:24:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:08,347 INFO L225 Difference]: With dead ends: 43476 [2019-11-23 21:24:08,348 INFO L226 Difference]: Without dead ends: 25534 [2019-11-23 21:24:08,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 445 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 21:24:08,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25534 states. [2019-11-23 21:24:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25534 to 24844. [2019-11-23 21:24:08,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24844 states. [2019-11-23 21:24:08,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24844 states to 24844 states and 30282 transitions. [2019-11-23 21:24:08,858 INFO L78 Accepts]: Start accepts. Automaton has 24844 states and 30282 transitions. Word has length 446 [2019-11-23 21:24:08,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:08,859 INFO L462 AbstractCegarLoop]: Abstraction has 24844 states and 30282 transitions. [2019-11-23 21:24:08,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:08,859 INFO L276 IsEmpty]: Start isEmpty. Operand 24844 states and 30282 transitions. [2019-11-23 21:24:08,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2019-11-23 21:24:08,871 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:08,871 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:24:09,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:09,075 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:09,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:09,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1167436311, now seen corresponding path program 1 times [2019-11-23 21:24:09,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:09,078 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937079896] [2019-11-23 21:24:09,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 457 proven. 3 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2019-11-23 21:24:09,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937079896] [2019-11-23 21:24:09,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328352907] [2019-11-23 21:24:09,904 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 21:24:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:10,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:10,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 506 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-23 21:24:10,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:10,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:24:10,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129477580] [2019-11-23 21:24:10,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:10,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:10,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:10,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:10,221 INFO L87 Difference]: Start difference. First operand 24844 states and 30282 transitions. Second operand 3 states. [2019-11-23 21:24:13,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:13,899 INFO L93 Difference]: Finished difference Result 60726 states and 75763 transitions. [2019-11-23 21:24:13,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:13,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2019-11-23 21:24:13,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:13,983 INFO L225 Difference]: With dead ends: 60726 [2019-11-23 21:24:13,984 INFO L226 Difference]: Without dead ends: 32434 [2019-11-23 21:24:14,018 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 494 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 21:24:14,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32434 states. [2019-11-23 21:24:14,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32434 to 31054. [2019-11-23 21:24:14,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31054 states. [2019-11-23 21:24:15,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31054 states to 31054 states and 33731 transitions. [2019-11-23 21:24:15,474 INFO L78 Accepts]: Start accepts. Automaton has 31054 states and 33731 transitions. Word has length 495 [2019-11-23 21:24:15,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:15,474 INFO L462 AbstractCegarLoop]: Abstraction has 31054 states and 33731 transitions. [2019-11-23 21:24:15,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:15,475 INFO L276 IsEmpty]: Start isEmpty. Operand 31054 states and 33731 transitions. [2019-11-23 21:24:15,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2019-11-23 21:24:15,503 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:15,505 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:24:15,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:15,713 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:15,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:15,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1425017023, now seen corresponding path program 1 times [2019-11-23 21:24:15,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:15,715 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853177616] [2019-11-23 21:24:15,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2019-11-23 21:24:16,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853177616] [2019-11-23 21:24:16,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:16,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:24:16,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883937717] [2019-11-23 21:24:16,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:16,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:16,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:16,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:16,983 INFO L87 Difference]: Start difference. First operand 31054 states and 33731 transitions. Second operand 4 states. [2019-11-23 21:24:21,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:21,685 INFO L93 Difference]: Finished difference Result 78666 states and 86524 transitions. [2019-11-23 21:24:21,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:21,686 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 977 [2019-11-23 21:24:21,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:21,739 INFO L225 Difference]: With dead ends: 78666 [2019-11-23 21:24:21,740 INFO L226 Difference]: Without dead ends: 48304 [2019-11-23 21:24:21,766 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 21:24:21,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48304 states. [2019-11-23 21:24:22,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48304 to 44854. [2019-11-23 21:24:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44854 states. [2019-11-23 21:24:22,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44854 states to 44854 states and 49150 transitions. [2019-11-23 21:24:22,307 INFO L78 Accepts]: Start accepts. Automaton has 44854 states and 49150 transitions. Word has length 977 [2019-11-23 21:24:22,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:22,309 INFO L462 AbstractCegarLoop]: Abstraction has 44854 states and 49150 transitions. [2019-11-23 21:24:22,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:24:22,309 INFO L276 IsEmpty]: Start isEmpty. Operand 44854 states and 49150 transitions. [2019-11-23 21:24:22,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2019-11-23 21:24:22,352 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:22,353 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:24:22,353 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:22,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:22,354 INFO L82 PathProgramCache]: Analyzing trace with hash -976790578, now seen corresponding path program 1 times [2019-11-23 21:24:22,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:22,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038109472] [2019-11-23 21:24:22,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1342 backedges. 819 proven. 0 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-23 21:24:24,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038109472] [2019-11-23 21:24:24,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:24,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:24:24,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530468945] [2019-11-23 21:24:24,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:24,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:24,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:24,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:24,095 INFO L87 Difference]: Start difference. First operand 44854 states and 49150 transitions. Second operand 4 states. [2019-11-23 21:24:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:29,414 INFO L93 Difference]: Finished difference Result 95226 states and 104045 transitions. [2019-11-23 21:24:29,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:29,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1131 [2019-11-23 21:24:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:29,483 INFO L225 Difference]: With dead ends: 95226 [2019-11-23 21:24:29,483 INFO L226 Difference]: Without dead ends: 51064 [2019-11-23 21:24:29,518 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 21:24:29,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51064 states. [2019-11-23 21:24:30,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51064 to 48994. [2019-11-23 21:24:30,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48994 states. [2019-11-23 21:24:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48994 states to 48994 states and 52221 transitions. [2019-11-23 21:24:30,111 INFO L78 Accepts]: Start accepts. Automaton has 48994 states and 52221 transitions. Word has length 1131 [2019-11-23 21:24:30,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:30,111 INFO L462 AbstractCegarLoop]: Abstraction has 48994 states and 52221 transitions. [2019-11-23 21:24:30,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:24:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 48994 states and 52221 transitions. [2019-11-23 21:24:30,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1215 [2019-11-23 21:24:30,133 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:30,134 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 21:24:30,135 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:30,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:30,135 INFO L82 PathProgramCache]: Analyzing trace with hash -707243784, now seen corresponding path program 1 times [2019-11-23 21:24:30,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:30,136 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076952805] [2019-11-23 21:24:30,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 1259 trivial. 0 not checked. [2019-11-23 21:24:31,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076952805] [2019-11-23 21:24:31,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:31,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:24:31,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487670898] [2019-11-23 21:24:31,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:31,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:31,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:31,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:31,994 INFO L87 Difference]: Start difference. First operand 48994 states and 52221 transitions. Second operand 4 states. [2019-11-23 21:24:37,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:37,199 INFO L93 Difference]: Finished difference Result 97296 states and 103749 transitions. [2019-11-23 21:24:37,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:37,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1214 [2019-11-23 21:24:37,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:37,247 INFO L225 Difference]: With dead ends: 97296 [2019-11-23 21:24:37,247 INFO L226 Difference]: Without dead ends: 48994 [2019-11-23 21:24:37,277 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 21:24:37,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48994 states. [2019-11-23 21:24:37,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48994 to 47614. [2019-11-23 21:24:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47614 states. [2019-11-23 21:24:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47614 states to 47614 states and 49487 transitions. [2019-11-23 21:24:37,703 INFO L78 Accepts]: Start accepts. Automaton has 47614 states and 49487 transitions. Word has length 1214 [2019-11-23 21:24:37,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:37,704 INFO L462 AbstractCegarLoop]: Abstraction has 47614 states and 49487 transitions. [2019-11-23 21:24:37,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:24:37,704 INFO L276 IsEmpty]: Start isEmpty. Operand 47614 states and 49487 transitions. [2019-11-23 21:24:37,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1257 [2019-11-23 21:24:37,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:37,725 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 21:24:37,725 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:37,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:37,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2071932092, now seen corresponding path program 1 times [2019-11-23 21:24:37,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:37,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198003985] [2019-11-23 21:24:37,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1865 backedges. 1021 proven. 0 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2019-11-23 21:24:39,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198003985] [2019-11-23 21:24:39,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:39,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:24:39,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816618333] [2019-11-23 21:24:39,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:39,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:39,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:39,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:39,480 INFO L87 Difference]: Start difference. First operand 47614 states and 49487 transitions. Second operand 4 states.