java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label04_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 19:07:51,888 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 19:07:51,896 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 19:07:51,917 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 19:07:51,917 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 19:07:51,918 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 19:07:51,920 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 19:07:51,923 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 19:07:51,924 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 19:07:51,932 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 19:07:51,933 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 19:07:51,933 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 19:07:51,934 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 19:07:51,935 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 19:07:51,936 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 19:07:51,937 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 19:07:51,938 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 19:07:51,939 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 19:07:51,941 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 19:07:51,943 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 19:07:51,943 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 19:07:51,945 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 19:07:51,947 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-06 19:07:51,955 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 19:07:51,975 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 19:07:51,975 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 19:07:51,976 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 19:07:51,976 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 19:07:51,978 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 19:07:51,978 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 19:07:51,978 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 19:07:51,979 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 19:07:51,979 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 19:07:51,979 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 19:07:51,979 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 19:07:51,979 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 19:07:51,980 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 19:07:51,981 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 19:07:51,981 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 19:07:51,981 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 19:07:51,981 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 19:07:51,982 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 19:07:51,982 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 19:07:51,982 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 19:07:51,982 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 19:07:51,983 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 19:07:51,984 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 19:07:51,984 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 19:07:51,984 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 19:07:51,985 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 19:07:51,985 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 19:07:51,985 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 19:07:52,050 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 19:07:52,069 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 19:07:52,072 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 19:07:52,075 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 19:07:52,075 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 19:07:52,076 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label04_false-unreach-call.c [2018-11-06 19:07:52,161 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18a617a4/e29c48ba13064968a2ffec706dc75600/FLAG0515d381d [2018-11-06 19:07:53,005 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 19:07:53,006 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label04_false-unreach-call.c [2018-11-06 19:07:53,040 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18a617a4/e29c48ba13064968a2ffec706dc75600/FLAG0515d381d [2018-11-06 19:07:53,056 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18a617a4/e29c48ba13064968a2ffec706dc75600 [2018-11-06 19:07:53,069 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 19:07:53,071 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 19:07:53,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 19:07:53,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 19:07:53,078 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 19:07:53,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:07:53" (1/1) ... [2018-11-06 19:07:53,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@692e9784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:53, skipping insertion in model container [2018-11-06 19:07:53,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:07:53" (1/1) ... [2018-11-06 19:07:53,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 19:07:53,302 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 19:07:54,800 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 19:07:54,804 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 19:07:55,574 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 19:07:55,608 INFO L193 MainTranslator]: Completed translation [2018-11-06 19:07:55,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:55 WrapperNode [2018-11-06 19:07:55,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 19:07:55,610 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 19:07:55,612 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 19:07:55,612 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 19:07:55,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:55" (1/1) ... [2018-11-06 19:07:55,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:55" (1/1) ... [2018-11-06 19:07:56,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 19:07:56,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 19:07:56,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 19:07:56,367 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 19:07:56,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:55" (1/1) ... [2018-11-06 19:07:56,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:55" (1/1) ... [2018-11-06 19:07:56,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:55" (1/1) ... [2018-11-06 19:07:56,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:55" (1/1) ... [2018-11-06 19:07:56,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:55" (1/1) ... [2018-11-06 19:07:56,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:55" (1/1) ... [2018-11-06 19:07:56,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:55" (1/1) ... [2018-11-06 19:07:56,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 19:07:56,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 19:07:56,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 19:07:56,895 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 19:07:56,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:55" (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 [2018-11-06 19:07:56,966 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-06 19:07:56,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 19:07:56,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 19:08:08,424 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 19:08:08,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:08:08 BoogieIcfgContainer [2018-11-06 19:08:08,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 19:08:08,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 19:08:08,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 19:08:08,429 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 19:08:08,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:07:53" (1/3) ... [2018-11-06 19:08:08,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54011bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:08:08, skipping insertion in model container [2018-11-06 19:08:08,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:55" (2/3) ... [2018-11-06 19:08:08,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54011bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:08:08, skipping insertion in model container [2018-11-06 19:08:08,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:08:08" (3/3) ... [2018-11-06 19:08:08,434 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label04_false-unreach-call.c [2018-11-06 19:08:08,444 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 19:08:08,454 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 19:08:08,473 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 19:08:08,524 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 19:08:08,525 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 19:08:08,525 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 19:08:08,525 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 19:08:08,525 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 19:08:08,525 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 19:08:08,525 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 19:08:08,525 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 19:08:08,526 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 19:08:08,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states. [2018-11-06 19:08:08,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-06 19:08:08,586 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:08:08,587 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:08:08,589 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:08:08,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:08:08,597 INFO L82 PathProgramCache]: Analyzing trace with hash -809652462, now seen corresponding path program 1 times [2018-11-06 19:08:08,599 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:08:08,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:08:08,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:08:08,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:08:08,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:08:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:08:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:08:08,980 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:08:08,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 19:08:08,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:08:09,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:08:09,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:08:09,006 INFO L87 Difference]: Start difference. First operand 1099 states. Second operand 4 states. [2018-11-06 19:08:21,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:08:21,291 INFO L93 Difference]: Finished difference Result 3973 states and 7416 transitions. [2018-11-06 19:08:21,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:08:21,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-11-06 19:08:21,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:08:21,344 INFO L225 Difference]: With dead ends: 3973 [2018-11-06 19:08:21,345 INFO L226 Difference]: Without dead ends: 2867 [2018-11-06 19:08:21,355 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:08:21,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2018-11-06 19:08:21,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 1938. [2018-11-06 19:08:21,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1938 states. [2018-11-06 19:08:21,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 3240 transitions. [2018-11-06 19:08:21,510 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 3240 transitions. Word has length 17 [2018-11-06 19:08:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:08:21,511 INFO L480 AbstractCegarLoop]: Abstraction has 1938 states and 3240 transitions. [2018-11-06 19:08:21,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:08:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 3240 transitions. [2018-11-06 19:08:21,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-06 19:08:21,517 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:08:21,519 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-06 19:08:21,519 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:08:21,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:08:21,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1179752616, now seen corresponding path program 1 times [2018-11-06 19:08:21,520 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:08:21,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:08:21,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:08:21,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:08:21,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:08:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:08:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:08:21,822 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:08:21,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 19:08:21,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:08:21,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:08:21,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:08:21,828 INFO L87 Difference]: Start difference. First operand 1938 states and 3240 transitions. Second operand 4 states. [2018-11-06 19:08:34,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:08:34,968 INFO L93 Difference]: Finished difference Result 7100 states and 12101 transitions. [2018-11-06 19:08:34,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:08:34,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2018-11-06 19:08:34,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:08:35,000 INFO L225 Difference]: With dead ends: 7100 [2018-11-06 19:08:35,000 INFO L226 Difference]: Without dead ends: 5164 [2018-11-06 19:08:35,005 INFO L604 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 [2018-11-06 19:08:35,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5164 states. [2018-11-06 19:08:35,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5164 to 3540. [2018-11-06 19:08:35,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3540 states. [2018-11-06 19:08:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 5445 transitions. [2018-11-06 19:08:35,091 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 5445 transitions. Word has length 89 [2018-11-06 19:08:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:08:35,092 INFO L480 AbstractCegarLoop]: Abstraction has 3540 states and 5445 transitions. [2018-11-06 19:08:35,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:08:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 5445 transitions. [2018-11-06 19:08:35,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-06 19:08:35,096 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:08:35,096 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-06 19:08:35,097 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:08:35,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:08:35,097 INFO L82 PathProgramCache]: Analyzing trace with hash 906656731, now seen corresponding path program 1 times [2018-11-06 19:08:35,097 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:08:35,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:08:35,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:08:35,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:08:35,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:08:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:08:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:08:35,416 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:08:35,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 19:08:35,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:08:35,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:08:35,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:08:35,417 INFO L87 Difference]: Start difference. First operand 3540 states and 5445 transitions. Second operand 4 states. [2018-11-06 19:08:45,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:08:45,492 INFO L93 Difference]: Finished difference Result 13555 states and 21081 transitions. [2018-11-06 19:08:45,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:08:45,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2018-11-06 19:08:45,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:08:45,545 INFO L225 Difference]: With dead ends: 13555 [2018-11-06 19:08:45,545 INFO L226 Difference]: Without dead ends: 10017 [2018-11-06 19:08:45,553 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:08:45,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10017 states. [2018-11-06 19:08:45,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10017 to 6718. [2018-11-06 19:08:45,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6718 states. [2018-11-06 19:08:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6718 states to 6718 states and 9885 transitions. [2018-11-06 19:08:45,708 INFO L78 Accepts]: Start accepts. Automaton has 6718 states and 9885 transitions. Word has length 103 [2018-11-06 19:08:45,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:08:45,708 INFO L480 AbstractCegarLoop]: Abstraction has 6718 states and 9885 transitions. [2018-11-06 19:08:45,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:08:45,709 INFO L276 IsEmpty]: Start isEmpty. Operand 6718 states and 9885 transitions. [2018-11-06 19:08:45,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-06 19:08:45,716 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:08:45,716 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-06 19:08:45,718 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:08:45,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:08:45,718 INFO L82 PathProgramCache]: Analyzing trace with hash -573138264, now seen corresponding path program 1 times [2018-11-06 19:08:45,718 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:08:45,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:08:45,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:08:45,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:08:45,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:08:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:08:46,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:08:46,075 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:08:46,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 19:08:46,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:08:46,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:08:46,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:08:46,078 INFO L87 Difference]: Start difference. First operand 6718 states and 9885 transitions. Second operand 4 states. [2018-11-06 19:08:57,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:08:57,739 INFO L93 Difference]: Finished difference Result 23855 states and 35012 transitions. [2018-11-06 19:08:57,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:08:57,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 121 [2018-11-06 19:08:57,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:08:57,794 INFO L225 Difference]: With dead ends: 23855 [2018-11-06 19:08:57,794 INFO L226 Difference]: Without dead ends: 17139 [2018-11-06 19:08:57,808 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:08:57,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17139 states. [2018-11-06 19:08:58,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17139 to 13037. [2018-11-06 19:08:58,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13037 states. [2018-11-06 19:08:58,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13037 states to 13037 states and 18976 transitions. [2018-11-06 19:08:58,046 INFO L78 Accepts]: Start accepts. Automaton has 13037 states and 18976 transitions. Word has length 121 [2018-11-06 19:08:58,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:08:58,047 INFO L480 AbstractCegarLoop]: Abstraction has 13037 states and 18976 transitions. [2018-11-06 19:08:58,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:08:58,047 INFO L276 IsEmpty]: Start isEmpty. Operand 13037 states and 18976 transitions. [2018-11-06 19:08:58,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-11-06 19:08:58,050 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:08:58,050 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-06 19:08:58,050 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:08:58,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:08:58,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1137380540, now seen corresponding path program 1 times [2018-11-06 19:08:58,051 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:08:58,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:08:58,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:08:58,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:08:58,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:08:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:08:58,590 WARN L179 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-11-06 19:08:58,924 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 11 [2018-11-06 19:08:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:08:58,970 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:08:58,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-06 19:08:58,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 19:08:58,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 19:08:58,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-06 19:08:58,974 INFO L87 Difference]: Start difference. First operand 13037 states and 18976 transitions. Second operand 6 states. [2018-11-06 19:09:16,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:09:16,362 INFO L93 Difference]: Finished difference Result 41151 states and 59128 transitions. [2018-11-06 19:09:16,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 19:09:16,367 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2018-11-06 19:09:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:09:16,420 INFO L225 Difference]: With dead ends: 41151 [2018-11-06 19:09:16,421 INFO L226 Difference]: Without dead ends: 28116 [2018-11-06 19:09:16,441 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-06 19:09:16,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28116 states. [2018-11-06 19:09:16,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28116 to 27248. [2018-11-06 19:09:16,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27248 states. [2018-11-06 19:09:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27248 states to 27248 states and 35784 transitions. [2018-11-06 19:09:16,820 INFO L78 Accepts]: Start accepts. Automaton has 27248 states and 35784 transitions. Word has length 129 [2018-11-06 19:09:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:09:16,821 INFO L480 AbstractCegarLoop]: Abstraction has 27248 states and 35784 transitions. [2018-11-06 19:09:16,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 19:09:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 27248 states and 35784 transitions. [2018-11-06 19:09:16,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-11-06 19:09:16,824 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:09:16,824 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-06 19:09:16,825 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:09:16,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:09:16,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1646760314, now seen corresponding path program 1 times [2018-11-06 19:09:16,825 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:09:16,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:09:16,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:09:16,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:09:16,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:09:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:09:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:09:17,135 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:09:17,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 19:09:17,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 19:09:17,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 19:09:17,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 19:09:17,136 INFO L87 Difference]: Start difference. First operand 27248 states and 35784 transitions. Second operand 5 states. [2018-11-06 19:09:32,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:09:32,233 INFO L93 Difference]: Finished difference Result 68929 states and 90709 transitions. [2018-11-06 19:09:32,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 19:09:32,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2018-11-06 19:09:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:09:32,286 INFO L225 Difference]: With dead ends: 68929 [2018-11-06 19:09:32,286 INFO L226 Difference]: Without dead ends: 41682 [2018-11-06 19:09:32,321 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 19:09:32,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41682 states. [2018-11-06 19:09:32,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41682 to 39902. [2018-11-06 19:09:32,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39902 states. [2018-11-06 19:09:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39902 states to 39902 states and 51943 transitions. [2018-11-06 19:09:32,842 INFO L78 Accepts]: Start accepts. Automaton has 39902 states and 51943 transitions. Word has length 143 [2018-11-06 19:09:32,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:09:32,842 INFO L480 AbstractCegarLoop]: Abstraction has 39902 states and 51943 transitions. [2018-11-06 19:09:32,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 19:09:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 39902 states and 51943 transitions. [2018-11-06 19:09:32,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-11-06 19:09:32,846 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:09:32,846 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:09:32,847 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:09:32,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:09:32,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1978214106, now seen corresponding path program 1 times [2018-11-06 19:09:32,847 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:09:32,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:09:32,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:09:32,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:09:32,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:09:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:09:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:09:33,236 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:09:33,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 19:09:33,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 19:09:33,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 19:09:33,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 19:09:33,237 INFO L87 Difference]: Start difference. First operand 39902 states and 51943 transitions. Second operand 5 states. [2018-11-06 19:09:47,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:09:47,301 INFO L93 Difference]: Finished difference Result 102969 states and 135207 transitions. [2018-11-06 19:09:47,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 19:09:47,302 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 200 [2018-11-06 19:09:47,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:09:47,398 INFO L225 Difference]: With dead ends: 102969 [2018-11-06 19:09:47,399 INFO L226 Difference]: Without dead ends: 63069 [2018-11-06 19:09:47,441 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 19:09:47,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63069 states. [2018-11-06 19:09:48,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63069 to 62872. [2018-11-06 19:09:48,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62872 states. [2018-11-06 19:09:48,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62872 states to 62872 states and 81368 transitions. [2018-11-06 19:09:48,186 INFO L78 Accepts]: Start accepts. Automaton has 62872 states and 81368 transitions. Word has length 200 [2018-11-06 19:09:48,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:09:48,186 INFO L480 AbstractCegarLoop]: Abstraction has 62872 states and 81368 transitions. [2018-11-06 19:09:48,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 19:09:48,186 INFO L276 IsEmpty]: Start isEmpty. Operand 62872 states and 81368 transitions. [2018-11-06 19:09:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-11-06 19:09:48,190 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:09:48,190 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:09:48,191 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:09:48,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:09:48,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1221191741, now seen corresponding path program 1 times [2018-11-06 19:09:48,191 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:09:48,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:09:48,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:09:48,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:09:48,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:09:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:09:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-11-06 19:09:48,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 19:09:48,562 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 19:09:48,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:09:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:09:48,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 19:09:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:09:48,858 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 19:09:48,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-11-06 19:09:48,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:09:48,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:09:48,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:09:48,860 INFO L87 Difference]: Start difference. First operand 62872 states and 81368 transitions. Second operand 4 states. [2018-11-06 19:09:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:09:59,278 INFO L93 Difference]: Finished difference Result 200665 states and 260766 transitions. [2018-11-06 19:09:59,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:09:59,278 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 229 [2018-11-06 19:09:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:09:59,523 INFO L225 Difference]: With dead ends: 200665 [2018-11-06 19:09:59,523 INFO L226 Difference]: Without dead ends: 137795 [2018-11-06 19:09:59,596 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:09:59,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137795 states. [2018-11-06 19:10:01,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137795 to 109360. [2018-11-06 19:10:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109360 states. [2018-11-06 19:10:01,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109360 states to 109360 states and 137444 transitions. [2018-11-06 19:10:01,649 INFO L78 Accepts]: Start accepts. Automaton has 109360 states and 137444 transitions. Word has length 229 [2018-11-06 19:10:01,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:10:01,650 INFO L480 AbstractCegarLoop]: Abstraction has 109360 states and 137444 transitions. [2018-11-06 19:10:01,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:10:01,650 INFO L276 IsEmpty]: Start isEmpty. Operand 109360 states and 137444 transitions. [2018-11-06 19:10:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-11-06 19:10:01,657 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:10:01,657 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:10:01,657 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:10:01,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:10:01,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1638924910, now seen corresponding path program 1 times [2018-11-06 19:10:01,658 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:10:01,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:10:01,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:10:01,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:10:01,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:10:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:10:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:10:02,490 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:10:02,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 19:10:02,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 19:10:02,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 19:10:02,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 19:10:02,492 INFO L87 Difference]: Start difference. First operand 109360 states and 137444 transitions. Second operand 3 states. [2018-11-06 19:10:09,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:10:09,478 INFO L93 Difference]: Finished difference Result 217115 states and 273078 transitions. [2018-11-06 19:10:09,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 19:10:09,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 258 [2018-11-06 19:10:09,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:10:09,629 INFO L225 Difference]: With dead ends: 217115 [2018-11-06 19:10:09,629 INFO L226 Difference]: Without dead ends: 108545 [2018-11-06 19:10:09,714 INFO L604 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 [2018-11-06 19:10:09,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108545 states. [2018-11-06 19:10:10,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108545 to 107747. [2018-11-06 19:10:10,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107747 states. [2018-11-06 19:10:10,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107747 states to 107747 states and 126557 transitions. [2018-11-06 19:10:10,914 INFO L78 Accepts]: Start accepts. Automaton has 107747 states and 126557 transitions. Word has length 258 [2018-11-06 19:10:10,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:10:10,914 INFO L480 AbstractCegarLoop]: Abstraction has 107747 states and 126557 transitions. [2018-11-06 19:10:10,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 19:10:10,915 INFO L276 IsEmpty]: Start isEmpty. Operand 107747 states and 126557 transitions. [2018-11-06 19:10:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-11-06 19:10:10,931 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:10:10,931 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-06 19:10:10,931 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:10:10,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:10:10,932 INFO L82 PathProgramCache]: Analyzing trace with hash 654159450, now seen corresponding path program 1 times [2018-11-06 19:10:10,932 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:10:10,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:10:10,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:10:10,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:10:10,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:10:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:10:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 189 proven. 1 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-06 19:10:11,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 19:10:11,239 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 19:10:11,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:10:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:10:11,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 19:10:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-11-06 19:10:11,478 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 19:10:11,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2018-11-06 19:10:11,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 19:10:11,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 19:10:11,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 19:10:11,479 INFO L87 Difference]: Start difference. First operand 107747 states and 126557 transitions. Second operand 5 states. [2018-11-06 19:10:23,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:10:23,086 INFO L93 Difference]: Finished difference Result 302948 states and 356526 transitions. [2018-11-06 19:10:23,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:10:23,087 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 304 [2018-11-06 19:10:23,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:10:23,320 INFO L225 Difference]: With dead ends: 302948 [2018-11-06 19:10:23,320 INFO L226 Difference]: Without dead ends: 185717 [2018-11-06 19:10:23,416 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 19:10:23,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185717 states. [2018-11-06 19:10:25,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185717 to 177024. [2018-11-06 19:10:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177024 states. [2018-11-06 19:10:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177024 states to 177024 states and 198814 transitions. [2018-11-06 19:10:25,844 INFO L78 Accepts]: Start accepts. Automaton has 177024 states and 198814 transitions. Word has length 304 [2018-11-06 19:10:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:10:25,845 INFO L480 AbstractCegarLoop]: Abstraction has 177024 states and 198814 transitions. [2018-11-06 19:10:25,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 19:10:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 177024 states and 198814 transitions. [2018-11-06 19:10:25,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-11-06 19:10:25,854 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:10:25,854 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:10:25,855 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:10:25,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:10:25,855 INFO L82 PathProgramCache]: Analyzing trace with hash -901331647, now seen corresponding path program 1 times [2018-11-06 19:10:25,855 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:10:25,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:10:25,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:10:25,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:10:25,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:10:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:10:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 19:10:26,395 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:10:26,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 19:10:26,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:10:26,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:10:26,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:10:26,396 INFO L87 Difference]: Start difference. First operand 177024 states and 198814 transitions. Second operand 4 states. [2018-11-06 19:10:39,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:10:39,920 INFO L93 Difference]: Finished difference Result 445504 states and 500113 transitions. [2018-11-06 19:10:39,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:10:39,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2018-11-06 19:10:39,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:10:40,236 INFO L225 Difference]: With dead ends: 445504 [2018-11-06 19:10:40,237 INFO L226 Difference]: Without dead ends: 266108 [2018-11-06 19:10:40,329 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:10:40,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266108 states. [2018-11-06 19:10:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266108 to 253449. [2018-11-06 19:10:43,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253449 states. [2018-11-06 19:10:44,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253449 states to 253449 states and 278921 transitions. [2018-11-06 19:10:44,131 INFO L78 Accepts]: Start accepts. Automaton has 253449 states and 278921 transitions. Word has length 324 [2018-11-06 19:10:44,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:10:44,131 INFO L480 AbstractCegarLoop]: Abstraction has 253449 states and 278921 transitions. [2018-11-06 19:10:44,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:10:44,132 INFO L276 IsEmpty]: Start isEmpty. Operand 253449 states and 278921 transitions. [2018-11-06 19:10:44,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-11-06 19:10:44,137 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:10:44,138 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:10:44,138 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:10:44,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:10:44,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1286046502, now seen corresponding path program 1 times [2018-11-06 19:10:44,139 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:10:44,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:10:44,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:10:44,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:10:44,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:10:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:10:44,500 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-11-06 19:10:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 368 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-06 19:10:44,601 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:10:44,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 19:10:44,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 19:10:44,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 19:10:44,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:10:44,602 INFO L87 Difference]: Start difference. First operand 253449 states and 278921 transitions. Second operand 4 states. [2018-11-06 19:10:56,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:10:56,448 INFO L93 Difference]: Finished difference Result 517930 states and 569302 transitions. [2018-11-06 19:10:56,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:10:56,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 375 [2018-11-06 19:10:56,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:10:56,770 INFO L225 Difference]: With dead ends: 517930 [2018-11-06 19:10:56,770 INFO L226 Difference]: Without dead ends: 252626 [2018-11-06 19:10:56,865 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 19:10:57,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252626 states. [2018-11-06 19:11:00,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252626 to 240803. [2018-11-06 19:11:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240803 states. [2018-11-06 19:11:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240803 states to 240803 states and 263272 transitions. [2018-11-06 19:11:00,723 INFO L78 Accepts]: Start accepts. Automaton has 240803 states and 263272 transitions. Word has length 375 [2018-11-06 19:11:00,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:11:00,723 INFO L480 AbstractCegarLoop]: Abstraction has 240803 states and 263272 transitions. [2018-11-06 19:11:00,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 19:11:00,723 INFO L276 IsEmpty]: Start isEmpty. Operand 240803 states and 263272 transitions. [2018-11-06 19:11:00,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2018-11-06 19:11:00,731 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:11:00,731 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:11:00,732 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:11:00,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:11:00,732 INFO L82 PathProgramCache]: Analyzing trace with hash -783547843, now seen corresponding path program 1 times [2018-11-06 19:11:00,732 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:11:00,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:11:00,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:11:00,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:11:00,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:11:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:11:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 387 proven. 5 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2018-11-06 19:11:01,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 19:11:01,214 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 19:11:01,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:11:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:11:01,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 19:11:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 387 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2018-11-06 19:11:07,615 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 19:11:07,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-11-06 19:11:07,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 19:11:07,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 19:11:07,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 19:11:07,617 INFO L87 Difference]: Start difference. First operand 240803 states and 263272 transitions. Second operand 5 states. [2018-11-06 19:11:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:11:15,842 INFO L93 Difference]: Finished difference Result 472119 states and 516685 transitions. [2018-11-06 19:11:15,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 19:11:15,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 455 [2018-11-06 19:11:15,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:11:16,143 INFO L225 Difference]: With dead ends: 472119 [2018-11-06 19:11:16,143 INFO L226 Difference]: Without dead ends: 231318 [2018-11-06 19:11:16,273 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 456 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 19:11:16,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231318 states. [2018-11-06 19:11:19,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231318 to 227374. [2018-11-06 19:11:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227374 states. [2018-11-06 19:11:19,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227374 states to 227374 states and 241701 transitions. [2018-11-06 19:11:19,581 INFO L78 Accepts]: Start accepts. Automaton has 227374 states and 241701 transitions. Word has length 455 [2018-11-06 19:11:19,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:11:19,582 INFO L480 AbstractCegarLoop]: Abstraction has 227374 states and 241701 transitions. [2018-11-06 19:11:19,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 19:11:19,582 INFO L276 IsEmpty]: Start isEmpty. Operand 227374 states and 241701 transitions. [2018-11-06 19:11:19,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-11-06 19:11:19,590 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:11:19,591 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 19:11:19,591 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:11:19,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:11:19,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1643178504, now seen corresponding path program 1 times [2018-11-06 19:11:19,592 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:11:19,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:11:19,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:11:19,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:11:19,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:11:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:11:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2018-11-06 19:11:20,155 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 19:11:20,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 19:11:20,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 19:11:20,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 19:11:20,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 19:11:20,156 INFO L87 Difference]: Start difference. First operand 227374 states and 241701 transitions. Second operand 3 states. [2018-11-06 19:11:25,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 19:11:25,820 INFO L93 Difference]: Finished difference Result 450784 states and 479213 transitions. [2018-11-06 19:11:25,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 19:11:25,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2018-11-06 19:11:25,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 19:11:26,143 INFO L225 Difference]: With dead ends: 450784 [2018-11-06 19:11:26,143 INFO L226 Difference]: Without dead ends: 223409 [2018-11-06 19:11:26,275 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 19:11:26,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223409 states. [2018-11-06 19:11:29,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223409 to 223408. [2018-11-06 19:11:29,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223408 states. [2018-11-06 19:11:30,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223408 states to 223408 states and 237489 transitions. [2018-11-06 19:11:30,067 INFO L78 Accepts]: Start accepts. Automaton has 223408 states and 237489 transitions. Word has length 507 [2018-11-06 19:11:30,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 19:11:30,067 INFO L480 AbstractCegarLoop]: Abstraction has 223408 states and 237489 transitions. [2018-11-06 19:11:30,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 19:11:30,068 INFO L276 IsEmpty]: Start isEmpty. Operand 223408 states and 237489 transitions. [2018-11-06 19:11:30,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2018-11-06 19:11:30,079 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 19:11:30,080 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-06 19:11:30,080 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 19:11:30,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 19:11:30,080 INFO L82 PathProgramCache]: Analyzing trace with hash -157004623, now seen corresponding path program 1 times [2018-11-06 19:11:30,080 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 19:11:30,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 19:11:30,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:11:30,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:11:30,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 19:11:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:11:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 392 proven. 16 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-11-06 19:11:30,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 19:11:30,971 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 19:11:30,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 19:11:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 19:11:31,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 19:11:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2018-11-06 19:11:32,263 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 19:11:32,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-11-06 19:11:32,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 19:11:32,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 19:11:32,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 19:11:32,266 INFO L87 Difference]: Start difference. First operand 223408 states and 237489 transitions. Second operand 5 states. Received shutdown request... [2018-11-06 19:11:33,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 19:11:33,050 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-06 19:11:33,057 WARN L205 ceAbstractionStarter]: Timeout [2018-11-06 19:11:33,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 07:11:33 BoogieIcfgContainer [2018-11-06 19:11:33,058 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-06 19:11:33,059 INFO L168 Benchmark]: Toolchain (without parser) took 219989.35 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -880.1 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-11-06 19:11:33,060 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 19:11:33,061 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2537.47 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 245.7 MB). Peak memory consumption was 245.7 MB. Max. memory is 7.1 GB. [2018-11-06 19:11:33,062 INFO L168 Benchmark]: Boogie Procedure Inliner took 756.10 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 807.9 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 67.6 MB. Max. memory is 7.1 GB. [2018-11-06 19:11:33,063 INFO L168 Benchmark]: Boogie Preprocessor took 527.25 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 67.4 MB). Peak memory consumption was 67.4 MB. Max. memory is 7.1 GB. [2018-11-06 19:11:33,063 INFO L168 Benchmark]: RCFGBuilder took 11530.29 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 238.0 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 30.9 MB). Peak memory consumption was 578.2 MB. Max. memory is 7.1 GB. [2018-11-06 19:11:33,064 INFO L168 Benchmark]: TraceAbstraction took 204632.59 ms. Allocated memory was 2.6 GB in the beginning and 4.6 GB in the end (delta: 2.1 GB). Free memory was 2.1 GB in the beginning and 2.3 GB in the end (delta: -220.8 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-11-06 19:11:33,070 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2537.47 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 245.7 MB). Peak memory consumption was 245.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 756.10 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 807.9 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 67.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 527.25 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 67.4 MB). Peak memory consumption was 67.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 11530.29 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 238.0 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 30.9 MB). Peak memory consumption was 578.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 204632.59 ms. Allocated memory was 2.6 GB in the beginning and 4.6 GB in the end (delta: 2.1 GB). Free memory was 2.1 GB in the beginning and 2.3 GB in the end (delta: -220.8 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 60). Cancelled while BasicCegarLoop was constructing difference of abstraction (223408states) and FLOYD_HOARE automaton (currently 2 states, 5 states before enhancement),while ReachableStatesComputation was computing reachable states (65 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 1099 locations, 1 error locations. TIMEOUT Result, 204.5s OverallTime, 15 OverallIterations, 6 TraceHistogramMax, 165.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 12193 SDtfs, 32268 SDslu, 4210 SDs, 0 SdLazy, 75465 SolverSat, 14805 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 129.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1633 GetRequests, 1589 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=253449occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 22.6s AutomataMinimizationTime, 14 MinimizatonAttempts, 79152 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 12.4s InterpolantComputationTime, 5418 NumberOfCodeBlocks, 5418 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 5399 ConstructedInterpolants, 0 QuantifiedInterpolants, 5247160 SizeOfPredicates, 2 NumberOfNonLiveVariables, 2135 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 19 InterpolantComputations, 15 PerfectInterpolantSequences, 5234/5260 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown