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/Problem13_label35_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 14:11:03,549 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 14:11:03,551 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 14:11:03,563 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 14:11:03,563 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 14:11:03,564 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 14:11:03,565 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 14:11:03,567 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 14:11:03,569 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 14:11:03,569 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 14:11:03,570 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 14:11:03,571 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 14:11:03,571 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 14:11:03,572 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 14:11:03,574 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 14:11:03,574 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 14:11:03,575 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 14:11:03,577 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 14:11:03,579 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 14:11:03,581 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 14:11:03,582 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 14:11:03,583 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 14:11:03,585 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 14:11:03,585 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 14:11:03,586 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 14:11:03,587 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 14:11:03,587 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 14:11:03,591 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 14:11:03,593 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 14:11:03,594 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 14:11:03,594 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 14:11:03,596 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 14:11:03,596 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 14:11:03,597 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 14:11:03,599 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 14:11:03,600 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 14:11:03,600 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 [2018-10-24 14:11:03,625 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 14:11:03,626 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 14:11:03,627 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 14:11:03,627 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 14:11:03,628 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 14:11:03,628 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 14:11:03,629 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 14:11:03,629 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 14:11:03,629 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 14:11:03,629 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 14:11:03,629 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 14:11:03,630 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 14:11:03,630 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 14:11:03,630 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 14:11:03,630 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 14:11:03,630 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 14:11:03,630 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 14:11:03,631 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 14:11:03,632 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 14:11:03,632 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:11:03,632 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 14:11:03,632 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 14:11:03,632 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 14:11:03,633 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 14:11:03,633 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 14:11:03,633 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 14:11:03,633 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 14:11:03,633 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 14:11:03,692 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 14:11:03,705 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 14:11:03,710 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 14:11:03,712 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 14:11:03,712 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 14:11:03,713 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label35_false-unreach-call.c [2018-10-24 14:11:03,776 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/99e12eea1/8c2d5612db7d4f3e967e1ad4de30befd/FLAG6bd2d2594 [2018-10-24 14:11:04,527 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 14:11:04,528 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label35_false-unreach-call.c [2018-10-24 14:11:04,560 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/99e12eea1/8c2d5612db7d4f3e967e1ad4de30befd/FLAG6bd2d2594 [2018-10-24 14:11:04,580 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/99e12eea1/8c2d5612db7d4f3e967e1ad4de30befd [2018-10-24 14:11:04,592 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 14:11:04,595 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 14:11:04,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 14:11:04,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 14:11:04,602 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 14:11:04,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:11:04" (1/1) ... [2018-10-24 14:11:04,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46764b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:11:04, skipping insertion in model container [2018-10-24 14:11:04,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:11:04" (1/1) ... [2018-10-24 14:11:04,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 14:11:04,820 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 14:11:06,337 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:11:06,344 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 14:11:07,170 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:11:07,207 INFO L193 MainTranslator]: Completed translation [2018-10-24 14:11:07,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:11:07 WrapperNode [2018-10-24 14:11:07,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 14:11:07,209 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 14:11:07,209 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 14:11:07,209 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 14:11:07,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:11:07" (1/1) ... [2018-10-24 14:11:07,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:11:07" (1/1) ... [2018-10-24 14:11:07,992 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 14:11:07,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 14:11:07,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 14:11:07,992 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 14:11:08,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:11:07" (1/1) ... [2018-10-24 14:11:08,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:11:07" (1/1) ... [2018-10-24 14:11:08,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:11:07" (1/1) ... [2018-10-24 14:11:08,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:11:07" (1/1) ... [2018-10-24 14:11:08,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:11:07" (1/1) ... [2018-10-24 14:11:08,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:11:07" (1/1) ... [2018-10-24 14:11:08,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:11:07" (1/1) ... [2018-10-24 14:11:08,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 14:11:08,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 14:11:08,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 14:11:08,618 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 14:11:08,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:11:07" (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 [2018-10-24 14:11:08,690 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 14:11:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 14:11:08,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 14:11:23,547 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 14:11:23,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:11:23 BoogieIcfgContainer [2018-10-24 14:11:23,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 14:11:23,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 14:11:23,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 14:11:23,553 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 14:11:23,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:11:04" (1/3) ... [2018-10-24 14:11:23,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53def84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:11:23, skipping insertion in model container [2018-10-24 14:11:23,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:11:07" (2/3) ... [2018-10-24 14:11:23,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53def84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:11:23, skipping insertion in model container [2018-10-24 14:11:23,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:11:23" (3/3) ... [2018-10-24 14:11:23,557 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label35_false-unreach-call.c [2018-10-24 14:11:23,567 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 14:11:23,578 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 14:11:23,596 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 14:11:23,643 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 14:11:23,644 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 14:11:23,644 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 14:11:23,644 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 14:11:23,644 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 14:11:23,644 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 14:11:23,644 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 14:11:23,645 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 14:11:23,645 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 14:11:23,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states. [2018-10-24 14:11:23,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-24 14:11:23,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:11:23,695 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:11:23,697 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:11:23,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:11:23,706 INFO L82 PathProgramCache]: Analyzing trace with hash -159296518, now seen corresponding path program 1 times [2018-10-24 14:11:23,708 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:11:23,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:11:23,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:11:23,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:11:23,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:11:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:11:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:11:23,997 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:11:23,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:11:24,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:11:24,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:11:24,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:11:24,025 INFO L87 Difference]: Start difference. First operand 1099 states. Second operand 4 states. [2018-10-24 14:11:42,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:11:42,212 INFO L93 Difference]: Finished difference Result 3896 states and 7286 transitions. [2018-10-24 14:11:42,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:11:42,215 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-10-24 14:11:42,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:11:42,261 INFO L225 Difference]: With dead ends: 3896 [2018-10-24 14:11:42,261 INFO L226 Difference]: Without dead ends: 2790 [2018-10-24 14:11:42,270 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 [2018-10-24 14:11:42,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2018-10-24 14:11:42,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 1945. [2018-10-24 14:11:42,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1945 states. [2018-10-24 14:11:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 3412 transitions. [2018-10-24 14:11:42,442 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 3412 transitions. Word has length 11 [2018-10-24 14:11:42,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:11:42,442 INFO L481 AbstractCegarLoop]: Abstraction has 1945 states and 3412 transitions. [2018-10-24 14:11:42,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:11:42,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 3412 transitions. [2018-10-24 14:11:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-24 14:11:42,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:11:42,448 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:11:42,449 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:11:42,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:11:42,449 INFO L82 PathProgramCache]: Analyzing trace with hash -407574543, now seen corresponding path program 1 times [2018-10-24 14:11:42,449 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:11:42,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:11:42,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:11:42,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:11:42,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:11:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:11:43,035 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2018-10-24 14:11:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:11:43,387 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:11:43,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:11:43,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:11:43,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:11:43,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:11:43,390 INFO L87 Difference]: Start difference. First operand 1945 states and 3412 transitions. Second operand 5 states. [2018-10-24 14:11:43,641 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-24 14:12:03,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:12:03,339 INFO L93 Difference]: Finished difference Result 7061 states and 12475 transitions. [2018-10-24 14:12:03,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:12:03,339 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2018-10-24 14:12:03,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:12:03,366 INFO L225 Difference]: With dead ends: 7061 [2018-10-24 14:12:03,366 INFO L226 Difference]: Without dead ends: 5118 [2018-10-24 14:12:03,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:12:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2018-10-24 14:12:03,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 5117. [2018-10-24 14:12:03,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5117 states. [2018-10-24 14:12:03,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5117 states to 5117 states and 7612 transitions. [2018-10-24 14:12:03,464 INFO L78 Accepts]: Start accepts. Automaton has 5117 states and 7612 transitions. Word has length 77 [2018-10-24 14:12:03,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:12:03,465 INFO L481 AbstractCegarLoop]: Abstraction has 5117 states and 7612 transitions. [2018-10-24 14:12:03,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:12:03,465 INFO L276 IsEmpty]: Start isEmpty. Operand 5117 states and 7612 transitions. [2018-10-24 14:12:03,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-24 14:12:03,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:12:03,475 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:12:03,476 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:12:03,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:12:03,476 INFO L82 PathProgramCache]: Analyzing trace with hash 391703246, now seen corresponding path program 1 times [2018-10-24 14:12:03,476 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:12:03,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:12:03,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:12:03,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:12:03,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:12:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:12:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:12:03,635 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:12:03,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:12:03,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:12:03,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:12:03,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:12:03,636 INFO L87 Difference]: Start difference. First operand 5117 states and 7612 transitions. Second operand 3 states. [2018-10-24 14:12:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:12:09,699 INFO L93 Difference]: Finished difference Result 10220 states and 15517 transitions. [2018-10-24 14:12:09,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:12:09,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2018-10-24 14:12:09,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:12:09,730 INFO L225 Difference]: With dead ends: 10220 [2018-10-24 14:12:09,730 INFO L226 Difference]: Without dead ends: 5893 [2018-10-24 14:12:09,738 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 [2018-10-24 14:12:09,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5893 states. [2018-10-24 14:12:09,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5893 to 5892. [2018-10-24 14:12:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5892 states. [2018-10-24 14:12:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5892 states to 5892 states and 7437 transitions. [2018-10-24 14:12:09,848 INFO L78 Accepts]: Start accepts. Automaton has 5892 states and 7437 transitions. Word has length 137 [2018-10-24 14:12:09,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:12:09,848 INFO L481 AbstractCegarLoop]: Abstraction has 5892 states and 7437 transitions. [2018-10-24 14:12:09,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:12:09,849 INFO L276 IsEmpty]: Start isEmpty. Operand 5892 states and 7437 transitions. [2018-10-24 14:12:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-24 14:12:09,854 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:12:09,854 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:12:09,854 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:12:09,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:12:09,855 INFO L82 PathProgramCache]: Analyzing trace with hash 443824725, now seen corresponding path program 1 times [2018-10-24 14:12:09,855 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:12:09,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:12:09,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:12:09,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:12:09,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:12:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:12:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-24 14:12:10,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:12:10,060 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 [2018-10-24 14:12:10,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:12:10,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:12:10,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:12:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:12:10,347 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:12:10,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-10-24 14:12:10,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:12:10,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:12:10,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:12:10,350 INFO L87 Difference]: Start difference. First operand 5892 states and 7437 transitions. Second operand 5 states. [2018-10-24 14:12:25,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:12:25,495 INFO L93 Difference]: Finished difference Result 20501 states and 27031 transitions. [2018-10-24 14:12:25,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:12:25,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 176 [2018-10-24 14:12:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:12:25,562 INFO L225 Difference]: With dead ends: 20501 [2018-10-24 14:12:25,562 INFO L226 Difference]: Without dead ends: 15399 [2018-10-24 14:12:25,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:12:25,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15399 states. [2018-10-24 14:12:25,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15399 to 10627. [2018-10-24 14:12:25,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10627 states. [2018-10-24 14:12:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10627 states to 10627 states and 13141 transitions. [2018-10-24 14:12:26,002 INFO L78 Accepts]: Start accepts. Automaton has 10627 states and 13141 transitions. Word has length 176 [2018-10-24 14:12:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:12:26,004 INFO L481 AbstractCegarLoop]: Abstraction has 10627 states and 13141 transitions. [2018-10-24 14:12:26,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:12:26,005 INFO L276 IsEmpty]: Start isEmpty. Operand 10627 states and 13141 transitions. [2018-10-24 14:12:26,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-24 14:12:26,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:12:26,015 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:12:26,016 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:12:26,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:12:26,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1381219142, now seen corresponding path program 1 times [2018-10-24 14:12:26,016 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:12:26,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:12:26,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:12:26,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:12:26,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:12:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:12:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-10-24 14:12:26,295 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:12:26,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 14:12:26,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:12:26,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:12:26,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:12:26,297 INFO L87 Difference]: Start difference. First operand 10627 states and 13141 transitions. Second operand 3 states. [2018-10-24 14:12:32,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:12:32,894 INFO L93 Difference]: Finished difference Result 28343 states and 35767 transitions. [2018-10-24 14:12:32,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:12:32,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 187 [2018-10-24 14:12:32,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:12:32,942 INFO L225 Difference]: With dead ends: 28343 [2018-10-24 14:12:32,942 INFO L226 Difference]: Without dead ends: 18506 [2018-10-24 14:12:32,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:12:32,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18506 states. [2018-10-24 14:12:33,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18506 to 18505. [2018-10-24 14:12:33,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18505 states. [2018-10-24 14:12:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18505 states to 18505 states and 22008 transitions. [2018-10-24 14:12:33,230 INFO L78 Accepts]: Start accepts. Automaton has 18505 states and 22008 transitions. Word has length 187 [2018-10-24 14:12:33,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:12:33,231 INFO L481 AbstractCegarLoop]: Abstraction has 18505 states and 22008 transitions. [2018-10-24 14:12:33,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:12:33,231 INFO L276 IsEmpty]: Start isEmpty. Operand 18505 states and 22008 transitions. [2018-10-24 14:12:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-24 14:12:33,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:12:33,237 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:12:33,238 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:12:33,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:12:33,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1345595991, now seen corresponding path program 1 times [2018-10-24 14:12:33,238 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:12:33,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:12:33,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:12:33,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:12:33,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:12:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:12:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-10-24 14:12:33,525 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:12:33,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:12:33,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:12:33,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:12:33,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:12:33,527 INFO L87 Difference]: Start difference. First operand 18505 states and 22008 transitions. Second operand 3 states. [2018-10-24 14:12:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:12:39,635 INFO L93 Difference]: Finished difference Result 36218 states and 43220 transitions. [2018-10-24 14:12:39,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:12:39,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 225 [2018-10-24 14:12:39,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:12:39,664 INFO L225 Difference]: With dead ends: 36218 [2018-10-24 14:12:39,665 INFO L226 Difference]: Without dead ends: 18503 [2018-10-24 14:12:39,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:12:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18503 states. [2018-10-24 14:12:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18503 to 18502. [2018-10-24 14:12:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18502 states. [2018-10-24 14:12:39,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18502 states to 18502 states and 21047 transitions. [2018-10-24 14:12:39,931 INFO L78 Accepts]: Start accepts. Automaton has 18502 states and 21047 transitions. Word has length 225 [2018-10-24 14:12:39,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:12:39,932 INFO L481 AbstractCegarLoop]: Abstraction has 18502 states and 21047 transitions. [2018-10-24 14:12:39,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:12:39,932 INFO L276 IsEmpty]: Start isEmpty. Operand 18502 states and 21047 transitions. [2018-10-24 14:12:39,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-10-24 14:12:39,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:12:39,939 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:12:39,940 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:12:39,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:12:39,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1820376023, now seen corresponding path program 1 times [2018-10-24 14:12:39,940 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:12:39,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:12:39,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:12:39,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:12:39,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:12:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:12:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-24 14:12:40,445 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:12:40,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:12:40,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:12:40,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:12:40,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:12:40,449 INFO L87 Difference]: Start difference. First operand 18502 states and 21047 transitions. Second operand 4 states. [2018-10-24 14:12:54,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:12:54,712 INFO L93 Difference]: Finished difference Result 66979 states and 76824 transitions. [2018-10-24 14:12:54,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:12:54,719 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 306 [2018-10-24 14:12:54,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:12:54,776 INFO L225 Difference]: With dead ends: 66979 [2018-10-24 14:12:54,777 INFO L226 Difference]: Without dead ends: 47675 [2018-10-24 14:12:54,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:12:54,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47675 states. [2018-10-24 14:12:55,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47675 to 46857. [2018-10-24 14:12:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46857 states. [2018-10-24 14:12:55,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46857 states to 46857 states and 51707 transitions. [2018-10-24 14:12:55,331 INFO L78 Accepts]: Start accepts. Automaton has 46857 states and 51707 transitions. Word has length 306 [2018-10-24 14:12:55,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:12:55,332 INFO L481 AbstractCegarLoop]: Abstraction has 46857 states and 51707 transitions. [2018-10-24 14:12:55,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:12:55,332 INFO L276 IsEmpty]: Start isEmpty. Operand 46857 states and 51707 transitions. [2018-10-24 14:12:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-10-24 14:12:55,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:12:55,344 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-10-24 14:12:55,344 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:12:55,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:12:55,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1784131902, now seen corresponding path program 1 times [2018-10-24 14:12:55,345 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:12:55,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:12:55,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:12:55,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:12:55,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:12:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:12:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-24 14:12:55,799 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:12:55,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:12:55,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:12:55,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:12:55,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:12:55,801 INFO L87 Difference]: Start difference. First operand 46857 states and 51707 transitions. Second operand 4 states. [2018-10-24 14:13:03,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:13:03,681 INFO L93 Difference]: Finished difference Result 98441 states and 108578 transitions. [2018-10-24 14:13:03,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:13:03,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 362 [2018-10-24 14:13:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:13:03,734 INFO L225 Difference]: With dead ends: 98441 [2018-10-24 14:13:03,735 INFO L226 Difference]: Without dead ends: 47595 [2018-10-24 14:13:03,760 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 [2018-10-24 14:13:03,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47595 states. [2018-10-24 14:13:04,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47595 to 44442. [2018-10-24 14:13:04,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44442 states. [2018-10-24 14:13:04,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44442 states to 44442 states and 48533 transitions. [2018-10-24 14:13:04,297 INFO L78 Accepts]: Start accepts. Automaton has 44442 states and 48533 transitions. Word has length 362 [2018-10-24 14:13:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:13:04,298 INFO L481 AbstractCegarLoop]: Abstraction has 44442 states and 48533 transitions. [2018-10-24 14:13:04,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:13:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 44442 states and 48533 transitions. [2018-10-24 14:13:04,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-10-24 14:13:04,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:13:04,309 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:13:04,309 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:13:04,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:13:04,309 INFO L82 PathProgramCache]: Analyzing trace with hash 927079673, now seen corresponding path program 1 times [2018-10-24 14:13:04,310 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:13:04,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:13:04,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:13:04,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:13:04,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:13:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:13:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 427 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-24 14:13:04,894 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:13:04,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:13:04,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:13:04,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:13:04,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:13:04,896 INFO L87 Difference]: Start difference. First operand 44442 states and 48533 transitions. Second operand 5 states. [2018-10-24 14:13:22,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:13:22,904 INFO L93 Difference]: Finished difference Result 174233 states and 190489 transitions. [2018-10-24 14:13:22,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:13:22,904 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 368 [2018-10-24 14:13:22,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:13:23,066 INFO L225 Difference]: With dead ends: 174233 [2018-10-24 14:13:23,067 INFO L226 Difference]: Without dead ends: 130578 [2018-10-24 14:13:23,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:13:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130578 states. [2018-10-24 14:13:24,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130578 to 119380. [2018-10-24 14:13:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119380 states. [2018-10-24 14:13:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119380 states to 119380 states and 128807 transitions. [2018-10-24 14:13:24,575 INFO L78 Accepts]: Start accepts. Automaton has 119380 states and 128807 transitions. Word has length 368 [2018-10-24 14:13:24,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:13:24,576 INFO L481 AbstractCegarLoop]: Abstraction has 119380 states and 128807 transitions. [2018-10-24 14:13:24,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:13:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 119380 states and 128807 transitions. [2018-10-24 14:13:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2018-10-24 14:13:24,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:13:24,587 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:13:24,588 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:13:24,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:13:24,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1711417226, now seen corresponding path program 1 times [2018-10-24 14:13:24,588 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:13:24,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:13:24,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:13:24,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:13:24,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:13:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:13:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2018-10-24 14:13:24,987 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:13:24,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:13:24,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:13:24,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:13:24,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:13:24,988 INFO L87 Difference]: Start difference. First operand 119380 states and 128807 transitions. Second operand 4 states. [2018-10-24 14:13:34,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:13:34,343 INFO L93 Difference]: Finished difference Result 273447 states and 295208 transitions. [2018-10-24 14:13:34,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:13:34,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2018-10-24 14:13:34,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:13:34,503 INFO L225 Difference]: With dead ends: 273447 [2018-10-24 14:13:34,503 INFO L226 Difference]: Without dead ends: 153276 [2018-10-24 14:13:34,574 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 [2018-10-24 14:13:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153276 states. [2018-10-24 14:13:35,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153276 to 148527. [2018-10-24 14:13:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148527 states. [2018-10-24 14:13:35,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148527 states to 148527 states and 156351 transitions. [2018-10-24 14:13:35,920 INFO L78 Accepts]: Start accepts. Automaton has 148527 states and 156351 transitions. Word has length 396 [2018-10-24 14:13:35,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:13:35,921 INFO L481 AbstractCegarLoop]: Abstraction has 148527 states and 156351 transitions. [2018-10-24 14:13:35,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:13:35,922 INFO L276 IsEmpty]: Start isEmpty. Operand 148527 states and 156351 transitions. [2018-10-24 14:13:35,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2018-10-24 14:13:35,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:13:35,952 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:13:35,952 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:13:35,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:13:35,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1225289022, now seen corresponding path program 1 times [2018-10-24 14:13:35,956 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:13:35,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:13:35,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:13:35,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:13:35,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:13:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:13:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 642 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2018-10-24 14:13:37,294 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:13:37,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:13:37,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:13:37,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:13:37,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:13:37,296 INFO L87 Difference]: Start difference. First operand 148527 states and 156351 transitions. Second operand 4 states. [2018-10-24 14:13:51,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:13:51,121 INFO L93 Difference]: Finished difference Result 331040 states and 348936 transitions. [2018-10-24 14:13:51,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:13:51,121 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 577 [2018-10-24 14:13:51,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:13:51,330 INFO L225 Difference]: With dead ends: 331040 [2018-10-24 14:13:51,330 INFO L226 Difference]: Without dead ends: 183303 [2018-10-24 14:13:51,423 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 [2018-10-24 14:13:51,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183303 states. [2018-10-24 14:13:53,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183303 to 179266. [2018-10-24 14:13:53,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179266 states. [2018-10-24 14:13:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179266 states to 179266 states and 188740 transitions. [2018-10-24 14:13:53,641 INFO L78 Accepts]: Start accepts. Automaton has 179266 states and 188740 transitions. Word has length 577 [2018-10-24 14:13:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:13:53,642 INFO L481 AbstractCegarLoop]: Abstraction has 179266 states and 188740 transitions. [2018-10-24 14:13:53,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:13:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 179266 states and 188740 transitions. [2018-10-24 14:13:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2018-10-24 14:13:53,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:13:53,665 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:13:53,666 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:13:53,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:13:53,666 INFO L82 PathProgramCache]: Analyzing trace with hash -750371843, now seen corresponding path program 1 times [2018-10-24 14:13:53,666 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:13:53,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:13:53,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:13:53,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:13:53,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:13:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:13:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 465 proven. 0 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2018-10-24 14:13:54,290 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:13:54,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:13:54,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:13:54,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:13:54,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:13:54,291 INFO L87 Difference]: Start difference. First operand 179266 states and 188740 transitions. Second operand 4 states. [2018-10-24 14:14:04,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:14:04,835 INFO L93 Difference]: Finished difference Result 359287 states and 378501 transitions. [2018-10-24 14:14:04,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:14:04,835 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 607 [2018-10-24 14:14:04,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:14:05,060 INFO L225 Difference]: With dead ends: 359287 [2018-10-24 14:14:05,060 INFO L226 Difference]: Without dead ends: 180811 [2018-10-24 14:14:05,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:14:05,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180811 states. [2018-10-24 14:14:06,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180811 to 176082. [2018-10-24 14:14:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176082 states. [2018-10-24 14:14:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176082 states to 176082 states and 184802 transitions. [2018-10-24 14:14:06,767 INFO L78 Accepts]: Start accepts. Automaton has 176082 states and 184802 transitions. Word has length 607 [2018-10-24 14:14:06,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:14:06,768 INFO L481 AbstractCegarLoop]: Abstraction has 176082 states and 184802 transitions. [2018-10-24 14:14:06,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:14:06,768 INFO L276 IsEmpty]: Start isEmpty. Operand 176082 states and 184802 transitions. [2018-10-24 14:14:06,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2018-10-24 14:14:06,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:14:06,792 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:14:06,792 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:14:06,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:14:06,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1629185873, now seen corresponding path program 1 times [2018-10-24 14:14:06,793 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:14:06,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:14:06,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:14:06,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:14:06,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:14:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:14:07,590 WARN L179 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-24 14:14:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 465 proven. 0 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2018-10-24 14:14:09,316 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:14:09,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:14:09,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:14:09,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:14:09,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:14:09,318 INFO L87 Difference]: Start difference. First operand 176082 states and 184802 transitions. Second operand 4 states. [2018-10-24 14:14:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:14:19,031 INFO L93 Difference]: Finished difference Result 383711 states and 403579 transitions. [2018-10-24 14:14:19,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:14:19,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 687 [2018-10-24 14:14:19,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:14:19,265 INFO L225 Difference]: With dead ends: 383711 [2018-10-24 14:14:19,265 INFO L226 Difference]: Without dead ends: 208419 [2018-10-24 14:14:19,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:14:19,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208419 states. [2018-10-24 14:14:22,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208419 to 196565. [2018-10-24 14:14:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196565 states. [2018-10-24 14:14:22,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196565 states to 196565 states and 203822 transitions. [2018-10-24 14:14:22,459 INFO L78 Accepts]: Start accepts. Automaton has 196565 states and 203822 transitions. Word has length 687 [2018-10-24 14:14:22,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:14:22,460 INFO L481 AbstractCegarLoop]: Abstraction has 196565 states and 203822 transitions. [2018-10-24 14:14:22,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:14:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 196565 states and 203822 transitions. [2018-10-24 14:14:22,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2018-10-24 14:14:22,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:14:22,488 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:14:22,489 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:14:22,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:14:22,489 INFO L82 PathProgramCache]: Analyzing trace with hash -444298174, now seen corresponding path program 1 times [2018-10-24 14:14:22,489 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:14:22,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:14:22,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:14:22,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:14:22,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:14:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:14:23,376 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2018-10-24 14:14:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 480 proven. 287 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2018-10-24 14:14:24,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:14:24,943 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 [2018-10-24 14:14:24,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:14:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:14:25,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:14:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 664 proven. 0 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-10-24 14:14:31,572 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:14:31,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-24 14:14:31,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 14:14:31,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 14:14:31,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:14:31,578 INFO L87 Difference]: Start difference. First operand 196565 states and 203822 transitions. Second operand 7 states. Received shutdown request... [2018-10-24 14:14:51,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 14:14:51,274 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 14:14:51,279 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 14:14:51,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:14:51 BoogieIcfgContainer [2018-10-24 14:14:51,280 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 14:14:51,281 INFO L168 Benchmark]: Toolchain (without parser) took 226687.78 ms. Allocated memory was 1.5 GB in the beginning and 4.4 GB in the end (delta: 2.9 GB). Free memory was 1.4 GB in the beginning and 3.3 GB in the end (delta: -1.9 GB). Peak memory consumption was 927.9 MB. Max. memory is 7.1 GB. [2018-10-24 14:14:51,282 INFO L168 Benchmark]: CDTParser took 0.23 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. [2018-10-24 14:14:51,282 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2611.79 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. [2018-10-24 14:14:51,283 INFO L168 Benchmark]: Boogie Procedure Inliner took 783.13 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 824.2 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 73.1 MB. Max. memory is 7.1 GB. [2018-10-24 14:14:51,285 INFO L168 Benchmark]: Boogie Preprocessor took 624.86 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 61.8 MB). Peak memory consumption was 61.8 MB. Max. memory is 7.1 GB. [2018-10-24 14:14:51,285 INFO L168 Benchmark]: RCFGBuilder took 14931.32 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 247.5 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 32.7 MB). Peak memory consumption was 608.6 MB. Max. memory is 7.1 GB. [2018-10-24 14:14:51,286 INFO L168 Benchmark]: TraceAbstraction took 207730.66 ms. Allocated memory was 2.6 GB in the beginning and 4.4 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 3.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 529.1 MB. Max. memory is 7.1 GB. [2018-10-24 14:14:51,291 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 2611.79 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 783.13 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 824.2 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 73.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 624.86 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 61.8 MB). Peak memory consumption was 61.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 14931.32 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 247.5 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 32.7 MB). Peak memory consumption was 608.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 207730.66 ms. Allocated memory was 2.6 GB in the beginning and 4.4 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 3.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 529.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 42). Cancelled while BasicCegarLoop was constructing difference of abstraction (196565states) and FLOYD_HOARE automaton (currently 14 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (112573 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 1099 locations, 1 error locations. TIMEOUT Result, 207.6s OverallTime, 14 OverallIterations, 6 TraceHistogramMax, 177.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 10101 SDtfs, 33799 SDslu, 3184 SDs, 0 SdLazy, 71855 SolverSat, 15546 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 146.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1035 GetRequests, 984 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=196565occurred in iteration=13, 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: 12.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 46159 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 11.8s InterpolantComputationTime, 5872 NumberOfCodeBlocks, 5872 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 5856 ConstructedInterpolants, 90 QuantifiedInterpolants, 6865403 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1244 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 16 InterpolantComputations, 14 PerfectInterpolantSequences, 6719/7072 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown