java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-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/Problem15_label08_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 21:36:44,566 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:36:44,568 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:36:44,585 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:36:44,586 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:36:44,587 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:36:44,590 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:36:44,592 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:36:44,593 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:36:44,594 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:36:44,595 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:36:44,596 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:36:44,597 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:36:44,598 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:36:44,599 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:36:44,600 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:36:44,601 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:36:44,603 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:36:44,605 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:36:44,607 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:36:44,608 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:36:44,609 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:36:44,612 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-26 21:36:44,621 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-26 21:36:44,641 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:36:44,641 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:36:44,642 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:36:44,642 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 21:36:44,643 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 21:36:44,643 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 21:36:44,643 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 21:36:44,643 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:36:44,643 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 21:36:44,644 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:36:44,644 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:36:44,644 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:36:44,644 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:36:44,644 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:36:44,645 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:36:44,645 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:36:44,645 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:36:44,645 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:36:44,645 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:36:44,646 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:36:44,646 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:36:44,646 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:36:44,646 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:36:44,647 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 21:36:44,647 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:36:44,647 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 21:36:44,647 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 21:36:44,647 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 21:36:44,692 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:36:44,705 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:36:44,709 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:36:44,711 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:36:44,711 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:36:44,712 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label08_true-unreach-call.c [2018-10-26 21:36:44,774 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/dc1501061/c83d1ed27b564982be777c535f98571f/FLAG40910f5f5 [2018-10-26 21:36:45,492 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:36:45,493 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label08_true-unreach-call.c [2018-10-26 21:36:45,514 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/dc1501061/c83d1ed27b564982be777c535f98571f/FLAG40910f5f5 [2018-10-26 21:36:45,531 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/dc1501061/c83d1ed27b564982be777c535f98571f [2018-10-26 21:36:45,543 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:36:45,545 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 21:36:45,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:36:45,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:36:45,550 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:36:45,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:36:45" (1/1) ... [2018-10-26 21:36:45,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8de4687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:45, skipping insertion in model container [2018-10-26 21:36:45,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:36:45" (1/1) ... [2018-10-26 21:36:45,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:36:45,659 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:36:46,481 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:36:46,486 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:36:46,785 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:36:46,808 INFO L193 MainTranslator]: Completed translation [2018-10-26 21:36:46,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:46 WrapperNode [2018-10-26 21:36:46,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 21:36:46,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 21:36:46,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 21:36:46,811 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 21:36:46,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:46" (1/1) ... [2018-10-26 21:36:46,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:46" (1/1) ... [2018-10-26 21:36:47,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 21:36:47,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 21:36:47,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 21:36:47,218 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 21:36:47,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:46" (1/1) ... [2018-10-26 21:36:47,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:46" (1/1) ... [2018-10-26 21:36:47,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:46" (1/1) ... [2018-10-26 21:36:47,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:46" (1/1) ... [2018-10-26 21:36:47,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:46" (1/1) ... [2018-10-26 21:36:47,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:46" (1/1) ... [2018-10-26 21:36:47,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:46" (1/1) ... [2018-10-26 21:36:47,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 21:36:47,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 21:36:47,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 21:36:47,485 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 21:36:47,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 21:36:47,550 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-26 21:36:47,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 21:36:47,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 21:36:55,812 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 21:36:55,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:36:55 BoogieIcfgContainer [2018-10-26 21:36:55,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 21:36:55,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 21:36:55,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 21:36:55,818 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 21:36:55,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:36:45" (1/3) ... [2018-10-26 21:36:55,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af38133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:36:55, skipping insertion in model container [2018-10-26 21:36:55,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:46" (2/3) ... [2018-10-26 21:36:55,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af38133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:36:55, skipping insertion in model container [2018-10-26 21:36:55,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:36:55" (3/3) ... [2018-10-26 21:36:55,822 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label08_true-unreach-call.c [2018-10-26 21:36:55,833 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 21:36:55,842 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 21:36:55,860 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 21:36:55,899 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 21:36:55,900 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 21:36:55,900 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 21:36:55,900 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 21:36:55,901 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 21:36:55,901 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 21:36:55,901 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 21:36:55,901 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 21:36:55,901 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 21:36:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states. [2018-10-26 21:36:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-26 21:36:55,940 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:36:55,942 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:36:55,945 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:36:55,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:36:55,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2139005982, now seen corresponding path program 1 times [2018-10-26 21:36:55,955 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:36:55,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:36:56,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:36:56,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:36:56,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:36:56,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:36:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:36:56,474 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:36:56,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:36:56,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:36:56,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:36:56,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:36:56,499 INFO L87 Difference]: Start difference. First operand 425 states. Second operand 4 states. [2018-10-26 21:37:07,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:37:07,049 INFO L93 Difference]: Finished difference Result 1474 states and 2723 transitions. [2018-10-26 21:37:07,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:37:07,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2018-10-26 21:37:07,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:37:07,080 INFO L225 Difference]: With dead ends: 1474 [2018-10-26 21:37:07,080 INFO L226 Difference]: Without dead ends: 1042 [2018-10-26 21:37:07,087 INFO L605 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 [2018-10-26 21:37:07,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2018-10-26 21:37:07,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 1040. [2018-10-26 21:37:07,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1040 states. [2018-10-26 21:37:07,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1638 transitions. [2018-10-26 21:37:07,199 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1638 transitions. Word has length 52 [2018-10-26 21:37:07,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:37:07,201 INFO L481 AbstractCegarLoop]: Abstraction has 1040 states and 1638 transitions. [2018-10-26 21:37:07,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:37:07,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1638 transitions. [2018-10-26 21:37:07,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-26 21:37:07,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:37:07,208 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:37:07,208 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:37:07,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:37:07,212 INFO L82 PathProgramCache]: Analyzing trace with hash -2043425283, now seen corresponding path program 1 times [2018-10-26 21:37:07,212 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:37:07,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:37:07,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:37:07,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:37:07,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:37:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:37:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:37:07,532 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:37:07,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:37:07,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:37:07,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:37:07,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:37:07,535 INFO L87 Difference]: Start difference. First operand 1040 states and 1638 transitions. Second operand 4 states. [2018-10-26 21:37:17,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:37:17,434 INFO L93 Difference]: Finished difference Result 3887 states and 6230 transitions. [2018-10-26 21:37:17,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:37:17,435 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2018-10-26 21:37:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:37:17,453 INFO L225 Difference]: With dead ends: 3887 [2018-10-26 21:37:17,453 INFO L226 Difference]: Without dead ends: 2849 [2018-10-26 21:37:17,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:37:17,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2018-10-26 21:37:17,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2844. [2018-10-26 21:37:17,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2844 states. [2018-10-26 21:37:17,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 4039 transitions. [2018-10-26 21:37:17,534 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 4039 transitions. Word has length 118 [2018-10-26 21:37:17,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:37:17,535 INFO L481 AbstractCegarLoop]: Abstraction has 2844 states and 4039 transitions. [2018-10-26 21:37:17,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:37:17,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 4039 transitions. [2018-10-26 21:37:17,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-10-26 21:37:17,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:37:17,546 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:37:17,546 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:37:17,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:37:17,546 INFO L82 PathProgramCache]: Analyzing trace with hash -2102953207, now seen corresponding path program 1 times [2018-10-26 21:37:17,547 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:37:17,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:37:17,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:37:17,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:37:17,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:37:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:37:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 99 proven. 4 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-10-26 21:37:18,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:37:18,175 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 21:37:18,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:37:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:37:18,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:37:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:37:18,499 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:37:18,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-26 21:37:18,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:37:18,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:37:18,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:37:18,505 INFO L87 Difference]: Start difference. First operand 2844 states and 4039 transitions. Second operand 4 states. [2018-10-26 21:37:24,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:37:24,199 INFO L93 Difference]: Finished difference Result 10857 states and 15533 transitions. [2018-10-26 21:37:24,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:37:24,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 264 [2018-10-26 21:37:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:37:24,239 INFO L225 Difference]: With dead ends: 10857 [2018-10-26 21:37:24,240 INFO L226 Difference]: Without dead ends: 8015 [2018-10-26 21:37:24,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:37:24,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8015 states. [2018-10-26 21:37:24,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8015 to 4646. [2018-10-26 21:37:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4646 states. [2018-10-26 21:37:24,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4646 states to 4646 states and 6263 transitions. [2018-10-26 21:37:24,363 INFO L78 Accepts]: Start accepts. Automaton has 4646 states and 6263 transitions. Word has length 264 [2018-10-26 21:37:24,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:37:24,364 INFO L481 AbstractCegarLoop]: Abstraction has 4646 states and 6263 transitions. [2018-10-26 21:37:24,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:37:24,364 INFO L276 IsEmpty]: Start isEmpty. Operand 4646 states and 6263 transitions. [2018-10-26 21:37:24,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-10-26 21:37:24,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:37:24,372 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:37:24,372 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:37:24,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:37:24,373 INFO L82 PathProgramCache]: Analyzing trace with hash 147879681, now seen corresponding path program 1 times [2018-10-26 21:37:24,373 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:37:24,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:37:24,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:37:24,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:37:24,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:37:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:37:25,009 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-26 21:37:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-10-26 21:37:25,315 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:37:25,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:37:25,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:37:25,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:37:25,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:37:25,317 INFO L87 Difference]: Start difference. First operand 4646 states and 6263 transitions. Second operand 5 states. [2018-10-26 21:37:30,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:37:30,720 INFO L93 Difference]: Finished difference Result 11092 states and 14512 transitions. [2018-10-26 21:37:30,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:37:30,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2018-10-26 21:37:30,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:37:30,749 INFO L225 Difference]: With dead ends: 11092 [2018-10-26 21:37:30,750 INFO L226 Difference]: Without dead ends: 6448 [2018-10-26 21:37:30,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:37:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6448 states. [2018-10-26 21:37:30,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6448 to 6147. [2018-10-26 21:37:30,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6147 states. [2018-10-26 21:37:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6147 states to 6147 states and 7862 transitions. [2018-10-26 21:37:30,863 INFO L78 Accepts]: Start accepts. Automaton has 6147 states and 7862 transitions. Word has length 332 [2018-10-26 21:37:30,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:37:30,864 INFO L481 AbstractCegarLoop]: Abstraction has 6147 states and 7862 transitions. [2018-10-26 21:37:30,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:37:30,864 INFO L276 IsEmpty]: Start isEmpty. Operand 6147 states and 7862 transitions. [2018-10-26 21:37:30,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-10-26 21:37:30,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:37:30,876 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:37:30,877 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:37:30,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:37:30,877 INFO L82 PathProgramCache]: Analyzing trace with hash -2100025585, now seen corresponding path program 1 times [2018-10-26 21:37:30,877 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:37:30,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:37:30,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:37:30,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:37:30,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:37:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:37:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:37:31,374 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:37:31,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:37:31,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:37:31,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:37:31,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:37:31,376 INFO L87 Difference]: Start difference. First operand 6147 states and 7862 transitions. Second operand 4 states. [2018-10-26 21:37:37,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:37:37,492 INFO L93 Difference]: Finished difference Result 15298 states and 20011 transitions. [2018-10-26 21:37:37,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:37:37,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 406 [2018-10-26 21:37:37,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:37:37,545 INFO L225 Difference]: With dead ends: 15298 [2018-10-26 21:37:37,545 INFO L226 Difference]: Without dead ends: 9153 [2018-10-26 21:37:37,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:37:37,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9153 states. [2018-10-26 21:37:37,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9153 to 9150. [2018-10-26 21:37:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9150 states. [2018-10-26 21:37:37,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 11448 transitions. [2018-10-26 21:37:37,722 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 11448 transitions. Word has length 406 [2018-10-26 21:37:37,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:37:37,723 INFO L481 AbstractCegarLoop]: Abstraction has 9150 states and 11448 transitions. [2018-10-26 21:37:37,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:37:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 11448 transitions. [2018-10-26 21:37:37,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2018-10-26 21:37:37,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:37:37,740 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:37:37,740 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:37:37,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:37:37,741 INFO L82 PathProgramCache]: Analyzing trace with hash 593964008, now seen corresponding path program 1 times [2018-10-26 21:37:37,741 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:37:37,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:37:37,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:37:37,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:37:37,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:37:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:37:38,589 WARN L179 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2018-10-26 21:37:38,923 WARN L179 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2018-10-26 21:37:39,366 WARN L179 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2018-10-26 21:37:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 418 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-10-26 21:37:39,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:37:39,837 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 21:37:39,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:37:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:37:39,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:37:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 381 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-10-26 21:37:40,279 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:37:40,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-26 21:37:40,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 21:37:40,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 21:37:40,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-10-26 21:37:40,281 INFO L87 Difference]: Start difference. First operand 9150 states and 11448 transitions. Second operand 8 states. [2018-10-26 21:37:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:37:49,706 INFO L93 Difference]: Finished difference Result 22668 states and 27579 transitions. [2018-10-26 21:37:49,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 21:37:49,707 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 482 [2018-10-26 21:37:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:37:49,723 INFO L225 Difference]: With dead ends: 22668 [2018-10-26 21:37:49,724 INFO L226 Difference]: Without dead ends: 9445 [2018-10-26 21:37:49,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 485 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:37:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9445 states. [2018-10-26 21:37:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9445 to 9145. [2018-10-26 21:37:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9145 states. [2018-10-26 21:37:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9145 states to 9145 states and 10683 transitions. [2018-10-26 21:37:49,856 INFO L78 Accepts]: Start accepts. Automaton has 9145 states and 10683 transitions. Word has length 482 [2018-10-26 21:37:49,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:37:49,857 INFO L481 AbstractCegarLoop]: Abstraction has 9145 states and 10683 transitions. [2018-10-26 21:37:49,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 21:37:49,857 INFO L276 IsEmpty]: Start isEmpty. Operand 9145 states and 10683 transitions. [2018-10-26 21:37:49,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2018-10-26 21:37:49,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:37:49,874 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:37:49,875 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:37:49,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:37:49,875 INFO L82 PathProgramCache]: Analyzing trace with hash 404113246, now seen corresponding path program 1 times [2018-10-26 21:37:49,875 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:37:49,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:37:49,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:37:49,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:37:49,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:37:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:37:50,477 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-26 21:37:50,631 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2018-10-26 21:37:51,389 WARN L179 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2018-10-26 21:37:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 315 proven. 136 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-10-26 21:37:51,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:37:51,957 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 21:37:51,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:37:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:37:52,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:37:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-26 21:37:52,405 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:37:52,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2018-10-26 21:37:52,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 21:37:52,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 21:37:52,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-26 21:37:52,407 INFO L87 Difference]: Start difference. First operand 9145 states and 10683 transitions. Second operand 9 states. [2018-10-26 21:38:02,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:38:02,123 INFO L93 Difference]: Finished difference Result 18706 states and 21787 transitions. [2018-10-26 21:38:02,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 21:38:02,123 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 558 [2018-10-26 21:38:02,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:38:02,142 INFO L225 Difference]: With dead ends: 18706 [2018-10-26 21:38:02,142 INFO L226 Difference]: Without dead ends: 9563 [2018-10-26 21:38:02,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 562 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:38:02,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9563 states. [2018-10-26 21:38:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9563 to 9141. [2018-10-26 21:38:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9141 states. [2018-10-26 21:38:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9141 states to 9141 states and 10091 transitions. [2018-10-26 21:38:02,275 INFO L78 Accepts]: Start accepts. Automaton has 9141 states and 10091 transitions. Word has length 558 [2018-10-26 21:38:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:38:02,277 INFO L481 AbstractCegarLoop]: Abstraction has 9141 states and 10091 transitions. [2018-10-26 21:38:02,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 21:38:02,277 INFO L276 IsEmpty]: Start isEmpty. Operand 9141 states and 10091 transitions. [2018-10-26 21:38:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2018-10-26 21:38:02,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:38:02,300 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-26 21:38:02,301 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:38:02,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:38:02,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1175997957, now seen corresponding path program 1 times [2018-10-26 21:38:02,301 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:38:02,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:38:02,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:38:02,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:38:02,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:38:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:38:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-26 21:38:03,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:38:03,971 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 21:38:03,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:38:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:38:04,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:38:04,474 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 16 [2018-10-26 21:38:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-26 21:38:05,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:38:05,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2018-10-26 21:38:05,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 21:38:05,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 21:38:05,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-26 21:38:05,422 INFO L87 Difference]: Start difference. First operand 9141 states and 10091 transitions. Second operand 7 states. [2018-10-26 21:38:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:38:17,445 INFO L93 Difference]: Finished difference Result 35300 states and 39221 transitions. [2018-10-26 21:38:17,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 21:38:17,446 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 596 [2018-10-26 21:38:17,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:38:17,503 INFO L225 Difference]: With dead ends: 35300 [2018-10-26 21:38:17,503 INFO L226 Difference]: Without dead ends: 26161 [2018-10-26 21:38:17,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 594 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-26 21:38:17,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26161 states. [2018-10-26 21:38:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26161 to 14285. [2018-10-26 21:38:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14285 states. [2018-10-26 21:38:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14285 states to 14285 states and 15414 transitions. [2018-10-26 21:38:17,790 INFO L78 Accepts]: Start accepts. Automaton has 14285 states and 15414 transitions. Word has length 596 [2018-10-26 21:38:17,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:38:17,792 INFO L481 AbstractCegarLoop]: Abstraction has 14285 states and 15414 transitions. [2018-10-26 21:38:17,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 21:38:17,792 INFO L276 IsEmpty]: Start isEmpty. Operand 14285 states and 15414 transitions. [2018-10-26 21:38:17,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2018-10-26 21:38:17,804 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:38:17,805 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:38:17,805 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:38:17,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:38:17,806 INFO L82 PathProgramCache]: Analyzing trace with hash -470184576, now seen corresponding path program 1 times [2018-10-26 21:38:17,806 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:38:17,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:38:17,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:38:17,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:38:17,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:38:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:38:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 442 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-26 21:38:18,504 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:38:18,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:38:18,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:38:18,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:38:18,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:38:18,505 INFO L87 Difference]: Start difference. First operand 14285 states and 15414 transitions. Second operand 3 states. [2018-10-26 21:38:22,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:38:22,155 INFO L93 Difference]: Finished difference Result 30322 states and 32681 transitions. [2018-10-26 21:38:22,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:38:22,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 617 [2018-10-26 21:38:22,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:38:22,180 INFO L225 Difference]: With dead ends: 30322 [2018-10-26 21:38:22,181 INFO L226 Difference]: Without dead ends: 11785 [2018-10-26 21:38:22,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:38:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11785 states. [2018-10-26 21:38:22,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11785 to 7563. [2018-10-26 21:38:22,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7563 states. [2018-10-26 21:38:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7563 states to 7563 states and 7885 transitions. [2018-10-26 21:38:22,319 INFO L78 Accepts]: Start accepts. Automaton has 7563 states and 7885 transitions. Word has length 617 [2018-10-26 21:38:22,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:38:22,321 INFO L481 AbstractCegarLoop]: Abstraction has 7563 states and 7885 transitions. [2018-10-26 21:38:22,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:38:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand 7563 states and 7885 transitions. [2018-10-26 21:38:22,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 728 [2018-10-26 21:38:22,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:38:22,334 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:38:22,334 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:38:22,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:38:22,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1410963826, now seen corresponding path program 1 times [2018-10-26 21:38:22,335 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:38:22,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:38:22,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:38:22,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:38:22,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:38:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:38:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 477 proven. 50 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-26 21:38:24,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:38:24,453 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:38:24,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:38:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:38:24,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:38:25,233 WARN L179 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2018-10-26 21:38:25,554 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-10-26 21:38:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 477 proven. 50 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-26 21:38:26,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:38:26,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 13 [2018-10-26 21:38:26,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 21:38:26,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 21:38:26,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-10-26 21:38:26,734 INFO L87 Difference]: Start difference. First operand 7563 states and 7885 transitions. Second operand 13 states. [2018-10-26 21:38:39,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:38:39,766 INFO L93 Difference]: Finished difference Result 25613 states and 26764 transitions. [2018-10-26 21:38:39,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-26 21:38:39,766 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 727 [2018-10-26 21:38:39,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:38:39,793 INFO L225 Difference]: With dead ends: 25613 [2018-10-26 21:38:39,793 INFO L226 Difference]: Without dead ends: 17750 [2018-10-26 21:38:39,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 736 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2018-10-26 21:38:39,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17750 states. [2018-10-26 21:38:39,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17750 to 10864. [2018-10-26 21:38:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10864 states. [2018-10-26 21:38:39,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10864 states to 10864 states and 11238 transitions. [2018-10-26 21:38:39,981 INFO L78 Accepts]: Start accepts. Automaton has 10864 states and 11238 transitions. Word has length 727 [2018-10-26 21:38:39,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:38:39,982 INFO L481 AbstractCegarLoop]: Abstraction has 10864 states and 11238 transitions. [2018-10-26 21:38:39,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 21:38:39,982 INFO L276 IsEmpty]: Start isEmpty. Operand 10864 states and 11238 transitions. [2018-10-26 21:38:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2018-10-26 21:38:40,001 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:38:40,002 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:38:40,002 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:38:40,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:38:40,004 INFO L82 PathProgramCache]: Analyzing trace with hash 403974983, now seen corresponding path program 1 times [2018-10-26 21:38:40,004 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:38:40,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:38:40,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:38:40,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:38:40,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:38:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:38:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 813 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2018-10-26 21:38:40,842 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:38:40,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:38:40,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:38:40,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:38:40,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:38:40,844 INFO L87 Difference]: Start difference. First operand 10864 states and 11238 transitions. Second operand 4 states. [2018-10-26 21:38:42,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:38:42,983 INFO L93 Difference]: Finished difference Result 21426 states and 22172 transitions. [2018-10-26 21:38:42,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:38:42,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 825 [2018-10-26 21:38:42,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:38:42,997 INFO L225 Difference]: With dead ends: 21426 [2018-10-26 21:38:42,997 INFO L226 Difference]: Without dead ends: 10561 [2018-10-26 21:38:43,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:38:43,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2018-10-26 21:38:43,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 10561. [2018-10-26 21:38:43,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10561 states. [2018-10-26 21:38:43,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10561 states to 10561 states and 10862 transitions. [2018-10-26 21:38:43,141 INFO L78 Accepts]: Start accepts. Automaton has 10561 states and 10862 transitions. Word has length 825 [2018-10-26 21:38:43,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:38:43,141 INFO L481 AbstractCegarLoop]: Abstraction has 10561 states and 10862 transitions. [2018-10-26 21:38:43,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:38:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 10561 states and 10862 transitions. [2018-10-26 21:38:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2018-10-26 21:38:43,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:38:43,157 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:38:43,158 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:38:43,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:38:43,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1053157093, now seen corresponding path program 1 times [2018-10-26 21:38:43,159 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:38:43,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:38:43,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:38:43,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:38:43,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:38:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:38:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1049 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2018-10-26 21:38:44,085 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:38:44,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:38:44,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:38:44,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:38:44,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:38:44,087 INFO L87 Difference]: Start difference. First operand 10561 states and 10862 transitions. Second operand 3 states. [2018-10-26 21:38:45,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:38:45,970 INFO L93 Difference]: Finished difference Result 23220 states and 23882 transitions. [2018-10-26 21:38:45,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:38:45,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 826 [2018-10-26 21:38:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:38:45,981 INFO L225 Difference]: With dead ends: 23220 [2018-10-26 21:38:45,981 INFO L226 Difference]: Without dead ends: 12659 [2018-10-26 21:38:45,986 INFO L605 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 [2018-10-26 21:38:45,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12659 states. [2018-10-26 21:38:46,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12659 to 11453. [2018-10-26 21:38:46,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11453 states. [2018-10-26 21:38:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11453 states to 11453 states and 11742 transitions. [2018-10-26 21:38:46,142 INFO L78 Accepts]: Start accepts. Automaton has 11453 states and 11742 transitions. Word has length 826 [2018-10-26 21:38:46,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:38:46,143 INFO L481 AbstractCegarLoop]: Abstraction has 11453 states and 11742 transitions. [2018-10-26 21:38:46,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:38:46,143 INFO L276 IsEmpty]: Start isEmpty. Operand 11453 states and 11742 transitions. [2018-10-26 21:38:46,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 893 [2018-10-26 21:38:46,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:38:46,165 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:38:46,165 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:38:46,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:38:46,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1939654473, now seen corresponding path program 1 times [2018-10-26 21:38:46,166 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:38:46,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:38:46,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:38:46,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:38:46,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:38:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:38:46,777 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 3 [2018-10-26 21:38:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 690 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-10-26 21:38:47,083 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:38:47,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:38:47,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:38:47,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:38:47,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:38:47,084 INFO L87 Difference]: Start difference. First operand 11453 states and 11742 transitions. Second operand 3 states. [2018-10-26 21:38:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:38:48,630 INFO L93 Difference]: Finished difference Result 27110 states and 27816 transitions. [2018-10-26 21:38:48,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:38:48,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 892 [2018-10-26 21:38:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:38:48,644 INFO L225 Difference]: With dead ends: 27110 [2018-10-26 21:38:48,644 INFO L226 Difference]: Without dead ends: 15959 [2018-10-26 21:38:48,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:38:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15959 states. [2018-10-26 21:38:48,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15959 to 13550. [2018-10-26 21:38:48,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13550 states. [2018-10-26 21:38:48,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13550 states to 13550 states and 13882 transitions. [2018-10-26 21:38:48,839 INFO L78 Accepts]: Start accepts. Automaton has 13550 states and 13882 transitions. Word has length 892 [2018-10-26 21:38:48,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:38:48,840 INFO L481 AbstractCegarLoop]: Abstraction has 13550 states and 13882 transitions. [2018-10-26 21:38:48,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:38:48,840 INFO L276 IsEmpty]: Start isEmpty. Operand 13550 states and 13882 transitions. [2018-10-26 21:38:48,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2018-10-26 21:38:48,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:38:48,866 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:38:48,866 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:38:48,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:38:48,867 INFO L82 PathProgramCache]: Analyzing trace with hash 2071518071, now seen corresponding path program 1 times [2018-10-26 21:38:48,867 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:38:48,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:38:48,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:38:48,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:38:48,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:38:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:38:49,683 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-26 21:38:50,024 WARN L179 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2018-10-26 21:38:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 658 proven. 303 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2018-10-26 21:38:51,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:38:51,204 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:38:51,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:38:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:38:51,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:38:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 775 proven. 50 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2018-10-26 21:38:52,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:38:52,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 11 [2018-10-26 21:38:52,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 21:38:52,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 21:38:52,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-26 21:38:52,502 INFO L87 Difference]: Start difference. First operand 13550 states and 13882 transitions. Second operand 11 states. [2018-10-26 21:39:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:39:01,807 INFO L93 Difference]: Finished difference Result 32123 states and 32897 transitions. [2018-10-26 21:39:01,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-26 21:39:01,807 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 977 [2018-10-26 21:39:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:39:01,828 INFO L225 Difference]: With dead ends: 32123 [2018-10-26 21:39:01,828 INFO L226 Difference]: Without dead ends: 18575 [2018-10-26 21:39:01,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 991 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2018-10-26 21:39:01,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18575 states. [2018-10-26 21:39:02,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18575 to 14450. [2018-10-26 21:39:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14450 states. [2018-10-26 21:39:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14450 states to 14450 states and 14796 transitions. [2018-10-26 21:39:02,028 INFO L78 Accepts]: Start accepts. Automaton has 14450 states and 14796 transitions. Word has length 977 [2018-10-26 21:39:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:39:02,029 INFO L481 AbstractCegarLoop]: Abstraction has 14450 states and 14796 transitions. [2018-10-26 21:39:02,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 21:39:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand 14450 states and 14796 transitions. [2018-10-26 21:39:02,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 994 [2018-10-26 21:39:02,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:39:02,047 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-26 21:39:02,047 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:39:02,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:39:02,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1315706566, now seen corresponding path program 1 times [2018-10-26 21:39:02,048 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:39:02,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:39:02,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:39:02,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:39:02,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:39:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:39:02,947 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-26 21:39:03,142 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-10-26 21:39:03,415 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2018-10-26 21:39:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1307 backedges. 879 proven. 321 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-26 21:39:07,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:39:07,082 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:39:07,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:39:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:39:07,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:39:08,635 WARN L179 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 35 DAG size of output: 15 [2018-10-26 21:39:09,226 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 20 [2018-10-26 21:39:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1307 backedges. 791 proven. 50 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2018-10-26 21:39:11,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:39:11,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4] total 21 [2018-10-26 21:39:11,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-26 21:39:11,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-26 21:39:11,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2018-10-26 21:39:11,203 INFO L87 Difference]: Start difference. First operand 14450 states and 14796 transitions. Second operand 21 states. [2018-10-26 21:39:12,131 WARN L179 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2018-10-26 21:39:15,266 WARN L179 SmtUtils]: Spent 906.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2018-10-26 21:39:22,282 WARN L179 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2018-10-26 21:39:23,272 WARN L179 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2018-10-26 21:39:27,141 WARN L179 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2018-10-26 21:39:28,287 WARN L179 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2018-10-26 21:39:29,426 WARN L179 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2018-10-26 21:39:29,993 WARN L179 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-10-26 21:39:31,617 WARN L179 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2018-10-26 21:39:34,676 WARN L179 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2018-10-26 21:39:35,480 WARN L179 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2018-10-26 21:39:40,081 WARN L179 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2018-10-26 21:39:44,242 WARN L179 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-10-26 21:39:45,094 WARN L179 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2018-10-26 21:39:46,350 WARN L179 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2018-10-26 21:39:48,848 WARN L179 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2018-10-26 21:39:51,731 WARN L179 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2018-10-26 21:39:53,198 WARN L179 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2018-10-26 21:39:54,305 WARN L179 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2018-10-26 21:40:02,878 WARN L179 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2018-10-26 21:40:03,525 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2018-10-26 21:40:05,160 WARN L179 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2018-10-26 21:40:07,255 WARN L179 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2018-10-26 21:40:13,363 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2018-10-26 21:40:13,900 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2018-10-26 21:40:17,603 WARN L179 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2018-10-26 21:40:18,948 WARN L179 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2018-10-26 21:40:21,340 WARN L179 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2018-10-26 21:40:22,755 WARN L179 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 Received shutdown request... [2018-10-26 21:40:44,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-26 21:40:44,258 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 21:40:44,265 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 21:40:44,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 09:40:44 BoogieIcfgContainer [2018-10-26 21:40:44,265 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 21:40:44,266 INFO L168 Benchmark]: Toolchain (without parser) took 238722.29 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -246.9 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-10-26 21:40:44,267 INFO L168 Benchmark]: CDTParser took 0.22 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. [2018-10-26 21:40:44,268 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1263.50 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-10-26 21:40:44,268 INFO L168 Benchmark]: Boogie Procedure Inliner took 406.02 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 765.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -882.8 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2018-10-26 21:40:44,269 INFO L168 Benchmark]: Boogie Preprocessor took 266.93 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 41.4 MB). Peak memory consumption was 41.4 MB. Max. memory is 7.1 GB. [2018-10-26 21:40:44,270 INFO L168 Benchmark]: RCFGBuilder took 8329.13 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 302.3 MB). Peak memory consumption was 302.3 MB. Max. memory is 7.1 GB. [2018-10-26 21:40:44,271 INFO L168 Benchmark]: TraceAbstraction took 228450.47 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 1.7 GB in the end (delta: 186.6 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-10-26 21:40:44,275 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 1263.50 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 406.02 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 765.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -882.8 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 266.93 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 41.4 MB). Peak memory consumption was 41.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8329.13 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 302.3 MB). Peak memory consumption was 302.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 228450.47 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 1.7 GB in the end (delta: 186.6 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 160]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 160). Cancelled while BasicCegarLoop was constructing difference of abstraction (14450states) and FLOYD_HOARE automaton (currently 107 states, 21 states before enhancement),while ReachableStatesComputation was computing reachable states (41693 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 425 locations, 1 error locations. TIMEOUT Result, 228.3s OverallTime, 15 OverallIterations, 5 TraceHistogramMax, 193.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3727 SDtfs, 34313 SDslu, 3664 SDs, 0 SdLazy, 80418 SolverSat, 6746 SolverUnsat, 18 SolverUnknown, 0 SolverNotchecked, 145.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4943 GetRequests, 4713 SyntacticMatches, 23 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5256 ImplicationChecksByTransitivity, 37.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14450occurred in iteration=14, 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: 2.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 35126 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 19.7s InterpolantComputationTime, 13262 NumberOfCodeBlocks, 13262 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 13240 ConstructedInterpolants, 398 QuantifiedInterpolants, 59504042 SizeOfPredicates, 9 NumberOfNonLiveVariables, 5365 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 22 InterpolantComputations, 11 PerfectInterpolantSequences, 12581/13847 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown