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/Problem12_label03_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 14:00:32,660 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 14:00:32,662 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 14:00:32,674 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 14:00:32,675 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 14:00:32,676 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 14:00:32,677 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 14:00:32,679 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 14:00:32,681 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 14:00:32,681 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 14:00:32,682 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 14:00:32,683 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 14:00:32,683 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 14:00:32,684 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 14:00:32,685 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 14:00:32,686 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 14:00:32,687 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 14:00:32,689 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 14:00:32,691 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 14:00:32,693 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 14:00:32,694 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 14:00:32,695 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 14:00:32,697 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 14:00:32,706 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 14:00:32,721 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 14:00:32,722 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 14:00:32,723 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 14:00:32,723 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 14:00:32,723 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 14:00:32,724 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 14:00:32,724 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 14:00:32,724 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 14:00:32,724 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 14:00:32,725 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 14:00:32,725 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 14:00:32,725 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 14:00:32,725 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 14:00:32,725 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 14:00:32,726 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 14:00:32,726 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 14:00:32,726 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 14:00:32,726 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 14:00:32,726 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 14:00:32,727 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:00:32,727 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 14:00:32,727 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 14:00:32,727 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 14:00:32,727 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 14:00:32,728 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 14:00:32,728 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 14:00:32,728 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 14:00:32,728 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 14:00:32,786 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 14:00:32,807 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 14:00:32,811 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 14:00:32,812 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 14:00:32,813 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 14:00:32,814 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label03_false-unreach-call.c [2018-10-24 14:00:32,881 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/237fc0fe0/e6026ba53b264c84b31ae5b14049db72/FLAGee72b7375 [2018-10-24 14:00:33,598 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 14:00:33,599 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label03_false-unreach-call.c [2018-10-24 14:00:33,626 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/237fc0fe0/e6026ba53b264c84b31ae5b14049db72/FLAGee72b7375 [2018-10-24 14:00:33,642 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/237fc0fe0/e6026ba53b264c84b31ae5b14049db72 [2018-10-24 14:00:33,654 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 14:00:33,655 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 14:00:33,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 14:00:33,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 14:00:33,661 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 14:00:33,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:00:33" (1/1) ... [2018-10-24 14:00:33,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ebb76c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:33, skipping insertion in model container [2018-10-24 14:00:33,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:00:33" (1/1) ... [2018-10-24 14:00:33,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 14:00:33,834 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 14:00:35,143 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:00:35,147 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 14:00:35,739 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:00:35,768 INFO L193 MainTranslator]: Completed translation [2018-10-24 14:00:35,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:35 WrapperNode [2018-10-24 14:00:35,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 14:00:35,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 14:00:35,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 14:00:35,773 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 14:00:35,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:35" (1/1) ... [2018-10-24 14:00:35,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:35" (1/1) ... [2018-10-24 14:00:36,378 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 14:00:36,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 14:00:36,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 14:00:36,379 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 14:00:36,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:35" (1/1) ... [2018-10-24 14:00:36,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:35" (1/1) ... [2018-10-24 14:00:36,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:35" (1/1) ... [2018-10-24 14:00:36,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:35" (1/1) ... [2018-10-24 14:00:36,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:35" (1/1) ... [2018-10-24 14:00:36,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:35" (1/1) ... [2018-10-24 14:00:36,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:35" (1/1) ... [2018-10-24 14:00:36,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 14:00:36,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 14:00:36,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 14:00:36,718 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 14:00:36,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:35" (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 14:00:36,794 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 14:00:36,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 14:00:36,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 14:00:45,745 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 14:00:45,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:00:45 BoogieIcfgContainer [2018-10-24 14:00:45,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 14:00:45,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 14:00:45,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 14:00:45,750 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 14:00:45,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:00:33" (1/3) ... [2018-10-24 14:00:45,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ee5aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:00:45, skipping insertion in model container [2018-10-24 14:00:45,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:35" (2/3) ... [2018-10-24 14:00:45,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ee5aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:00:45, skipping insertion in model container [2018-10-24 14:00:45,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:00:45" (3/3) ... [2018-10-24 14:00:45,754 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label03_false-unreach-call.c [2018-10-24 14:00:45,764 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 14:00:45,775 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 14:00:45,793 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 14:00:45,837 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 14:00:45,838 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 14:00:45,838 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 14:00:45,839 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 14:00:45,839 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 14:00:45,839 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 14:00:45,839 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 14:00:45,839 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 14:00:45,839 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 14:00:45,875 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states. [2018-10-24 14:00:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 14:00:45,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:00:45,883 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] [2018-10-24 14:00:45,886 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:00:45,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:00:45,892 INFO L82 PathProgramCache]: Analyzing trace with hash 183950178, now seen corresponding path program 1 times [2018-10-24 14:00:45,894 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:00:45,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:00:45,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:45,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:00:45,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:00:46,260 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 14:00:46,272 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 14:00:46,275 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:00:46,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:00:46,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:00:46,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:00:46,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:00:46,299 INFO L87 Difference]: Start difference. First operand 819 states. Second operand 4 states. [2018-10-24 14:01:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:01:00,358 INFO L93 Difference]: Finished difference Result 3146 states and 6134 transitions. [2018-10-24 14:01:00,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:01:00,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-10-24 14:01:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:01:00,400 INFO L225 Difference]: With dead ends: 3146 [2018-10-24 14:01:00,400 INFO L226 Difference]: Without dead ends: 2320 [2018-10-24 14:01:00,409 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 14:01:00,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2018-10-24 14:01:00,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 2320. [2018-10-24 14:01:00,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2320 states. [2018-10-24 14:01:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 3858 transitions. [2018-10-24 14:01:00,573 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 3858 transitions. Word has length 20 [2018-10-24 14:01:00,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:01:00,574 INFO L481 AbstractCegarLoop]: Abstraction has 2320 states and 3858 transitions. [2018-10-24 14:01:00,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:01:00,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 3858 transitions. [2018-10-24 14:01:00,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-24 14:01:00,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:01:00,578 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:01:00,579 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:01:00,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:01:00,579 INFO L82 PathProgramCache]: Analyzing trace with hash 409777681, now seen corresponding path program 1 times [2018-10-24 14:01:00,580 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:01:00,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:01:00,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:01:00,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:01:00,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:01:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:01:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:01:00,812 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:01:00,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:01:00,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:01:00,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:01:00,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:01:00,815 INFO L87 Difference]: Start difference. First operand 2320 states and 3858 transitions. Second operand 4 states. [2018-10-24 14:01:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:01:12,962 INFO L93 Difference]: Finished difference Result 9150 states and 15304 transitions. [2018-10-24 14:01:12,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:01:12,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2018-10-24 14:01:12,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:01:12,998 INFO L225 Difference]: With dead ends: 9150 [2018-10-24 14:01:12,998 INFO L226 Difference]: Without dead ends: 6832 [2018-10-24 14:01:13,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:01:13,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2018-10-24 14:01:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 6832. [2018-10-24 14:01:13,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6832 states. [2018-10-24 14:01:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6832 states to 6832 states and 10752 transitions. [2018-10-24 14:01:13,135 INFO L78 Accepts]: Start accepts. Automaton has 6832 states and 10752 transitions. Word has length 92 [2018-10-24 14:01:13,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:01:13,136 INFO L481 AbstractCegarLoop]: Abstraction has 6832 states and 10752 transitions. [2018-10-24 14:01:13,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:01:13,136 INFO L276 IsEmpty]: Start isEmpty. Operand 6832 states and 10752 transitions. [2018-10-24 14:01:13,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-24 14:01:13,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:01:13,145 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:01:13,145 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:01:13,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:01:13,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1589834139, now seen corresponding path program 1 times [2018-10-24 14:01:13,146 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:01:13,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:01:13,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:01:13,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:01:13,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:01:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:01:13,998 WARN L179 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2018-10-24 14:01:14,102 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 99 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:01:14,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:01:14,103 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 14:01:14,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:01:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:01:14,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:01:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:01:14,440 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:01:14,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2018-10-24 14:01:14,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 14:01:14,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 14:01:14,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:01:14,445 INFO L87 Difference]: Start difference. First operand 6832 states and 10752 transitions. Second operand 6 states. [2018-10-24 14:01:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:01:37,991 INFO L93 Difference]: Finished difference Result 34744 states and 54342 transitions. [2018-10-24 14:01:37,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 14:01:37,992 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 162 [2018-10-24 14:01:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:01:38,092 INFO L225 Difference]: With dead ends: 34744 [2018-10-24 14:01:38,093 INFO L226 Difference]: Without dead ends: 25655 [2018-10-24 14:01:38,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 163 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-24 14:01:38,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25655 states. [2018-10-24 14:01:38,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25655 to 13599. [2018-10-24 14:01:38,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13599 states. [2018-10-24 14:01:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13599 states to 13599 states and 17321 transitions. [2018-10-24 14:01:38,430 INFO L78 Accepts]: Start accepts. Automaton has 13599 states and 17321 transitions. Word has length 162 [2018-10-24 14:01:38,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:01:38,434 INFO L481 AbstractCegarLoop]: Abstraction has 13599 states and 17321 transitions. [2018-10-24 14:01:38,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 14:01:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 13599 states and 17321 transitions. [2018-10-24 14:01:38,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-24 14:01:38,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:01:38,444 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:01:38,444 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:01:38,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:01:38,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1392396053, now seen corresponding path program 1 times [2018-10-24 14:01:38,445 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:01:38,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:01:38,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:01:38,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:01:38,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:01:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:01:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-24 14:01:38,929 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:01:38,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:01:38,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:01:38,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:01:38,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:01:38,931 INFO L87 Difference]: Start difference. First operand 13599 states and 17321 transitions. Second operand 4 states. [2018-10-24 14:01:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:01:47,702 INFO L93 Difference]: Finished difference Result 52012 states and 66740 transitions. [2018-10-24 14:01:47,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:01:47,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 235 [2018-10-24 14:01:47,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:01:47,770 INFO L225 Difference]: With dead ends: 52012 [2018-10-24 14:01:47,770 INFO L226 Difference]: Without dead ends: 36156 [2018-10-24 14:01:47,795 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 14:01:47,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36156 states. [2018-10-24 14:01:48,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36156 to 35404. [2018-10-24 14:01:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35404 states. [2018-10-24 14:01:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35404 states to 35404 states and 42647 transitions. [2018-10-24 14:01:48,290 INFO L78 Accepts]: Start accepts. Automaton has 35404 states and 42647 transitions. Word has length 235 [2018-10-24 14:01:48,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:01:48,291 INFO L481 AbstractCegarLoop]: Abstraction has 35404 states and 42647 transitions. [2018-10-24 14:01:48,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:01:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 35404 states and 42647 transitions. [2018-10-24 14:01:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-10-24 14:01:48,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:01:48,300 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:01:48,300 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:01:48,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:01:48,301 INFO L82 PathProgramCache]: Analyzing trace with hash -753498617, now seen corresponding path program 1 times [2018-10-24 14:01:48,301 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:01:48,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:01:48,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:01:48,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:01:48,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:01:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:01:48,702 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 14:01:49,232 WARN L179 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2018-10-24 14:01:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-24 14:01:49,536 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:01:49,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 14:01:49,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 14:01:49,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 14:01:49,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:01:49,537 INFO L87 Difference]: Start difference. First operand 35404 states and 42647 transitions. Second operand 6 states. [2018-10-24 14:02:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:02:00,488 INFO L93 Difference]: Finished difference Result 85094 states and 102815 transitions. [2018-10-24 14:02:00,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:02:00,492 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 275 [2018-10-24 14:02:00,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:02:00,591 INFO L225 Difference]: With dead ends: 85094 [2018-10-24 14:02:00,591 INFO L226 Difference]: Without dead ends: 49691 [2018-10-24 14:02:00,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:02:00,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49691 states. [2018-10-24 14:02:01,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49691 to 48939. [2018-10-24 14:02:01,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48939 states. [2018-10-24 14:02:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48939 states to 48939 states and 58617 transitions. [2018-10-24 14:02:01,283 INFO L78 Accepts]: Start accepts. Automaton has 48939 states and 58617 transitions. Word has length 275 [2018-10-24 14:02:01,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:02:01,283 INFO L481 AbstractCegarLoop]: Abstraction has 48939 states and 58617 transitions. [2018-10-24 14:02:01,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 14:02:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 48939 states and 58617 transitions. [2018-10-24 14:02:01,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-10-24 14:02:01,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:02:01,297 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:02:01,298 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:02:01,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:02:01,298 INFO L82 PathProgramCache]: Analyzing trace with hash -466085700, now seen corresponding path program 1 times [2018-10-24 14:02:01,298 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:02:01,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:02:01,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:01,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:02:01,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:02:01,688 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 14:02:02,045 WARN L179 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-10-24 14:02:02,547 WARN L179 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2018-10-24 14:02:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 220 proven. 6 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-10-24 14:02:02,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:02:02,704 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 14:02:02,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:02:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:02:02,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:02:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 291 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-24 14:02:03,255 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:02:03,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-24 14:02:03,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 14:02:03,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 14:02:03,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-24 14:02:03,256 INFO L87 Difference]: Start difference. First operand 48939 states and 58617 transitions. Second operand 8 states. [2018-10-24 14:02:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:02:17,869 INFO L93 Difference]: Finished difference Result 129460 states and 156538 transitions. [2018-10-24 14:02:17,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 14:02:17,870 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 346 [2018-10-24 14:02:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:02:17,962 INFO L225 Difference]: With dead ends: 129460 [2018-10-24 14:02:17,962 INFO L226 Difference]: Without dead ends: 76002 [2018-10-24 14:02:17,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 348 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-10-24 14:02:18,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76002 states. [2018-10-24 14:02:18,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76002 to 72994. [2018-10-24 14:02:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72994 states. [2018-10-24 14:02:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72994 states to 72994 states and 82851 transitions. [2018-10-24 14:02:18,771 INFO L78 Accepts]: Start accepts. Automaton has 72994 states and 82851 transitions. Word has length 346 [2018-10-24 14:02:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:02:18,771 INFO L481 AbstractCegarLoop]: Abstraction has 72994 states and 82851 transitions. [2018-10-24 14:02:18,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 14:02:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 72994 states and 82851 transitions. [2018-10-24 14:02:18,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2018-10-24 14:02:18,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:02:18,781 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:02:18,781 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:02:18,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:02:18,782 INFO L82 PathProgramCache]: Analyzing trace with hash 228884557, now seen corresponding path program 1 times [2018-10-24 14:02:18,782 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:02:18,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:02:18,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:18,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:02:18,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:02:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-10-24 14:02:19,092 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:02:19,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:02:19,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:02:19,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:02:19,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:02:19,093 INFO L87 Difference]: Start difference. First operand 72994 states and 82851 transitions. Second operand 4 states. [2018-10-24 14:02:27,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:02:27,201 INFO L93 Difference]: Finished difference Result 148994 states and 168814 transitions. [2018-10-24 14:02:27,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:02:27,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 352 [2018-10-24 14:02:27,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:02:27,282 INFO L225 Difference]: With dead ends: 148994 [2018-10-24 14:02:27,283 INFO L226 Difference]: Without dead ends: 76002 [2018-10-24 14:02:27,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:02:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76002 states. [2018-10-24 14:02:27,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76002 to 73746. [2018-10-24 14:02:27,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73746 states. [2018-10-24 14:02:27,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73746 states to 73746 states and 81935 transitions. [2018-10-24 14:02:27,962 INFO L78 Accepts]: Start accepts. Automaton has 73746 states and 81935 transitions. Word has length 352 [2018-10-24 14:02:27,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:02:27,962 INFO L481 AbstractCegarLoop]: Abstraction has 73746 states and 81935 transitions. [2018-10-24 14:02:27,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:02:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 73746 states and 81935 transitions. [2018-10-24 14:02:27,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-10-24 14:02:27,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:02:27,972 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-10-24 14:02:27,972 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:02:27,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:02:27,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1668097260, now seen corresponding path program 1 times [2018-10-24 14:02:27,973 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:02:27,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:02:27,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:27,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:02:27,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:02:28,316 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 14:02:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 248 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-24 14:02:28,502 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:02:28,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:02:28,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:02:28,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:02:28,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:02:28,504 INFO L87 Difference]: Start difference. First operand 73746 states and 81935 transitions. Second operand 4 states. [2018-10-24 14:02:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:02:34,904 INFO L93 Difference]: Finished difference Result 147490 states and 163830 transitions. [2018-10-24 14:02:34,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:02:34,905 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 362 [2018-10-24 14:02:34,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:02:34,985 INFO L225 Difference]: With dead ends: 147490 [2018-10-24 14:02:34,985 INFO L226 Difference]: Without dead ends: 72241 [2018-10-24 14:02:35,024 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 14:02:35,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72241 states. [2018-10-24 14:02:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72241 to 72241. [2018-10-24 14:02:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72241 states. [2018-10-24 14:02:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72241 states to 72241 states and 78849 transitions. [2018-10-24 14:02:36,116 INFO L78 Accepts]: Start accepts. Automaton has 72241 states and 78849 transitions. Word has length 362 [2018-10-24 14:02:36,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:02:36,117 INFO L481 AbstractCegarLoop]: Abstraction has 72241 states and 78849 transitions. [2018-10-24 14:02:36,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:02:36,117 INFO L276 IsEmpty]: Start isEmpty. Operand 72241 states and 78849 transitions. [2018-10-24 14:02:36,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2018-10-24 14:02:36,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:02:36,134 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:02:36,134 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:02:36,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:02:36,134 INFO L82 PathProgramCache]: Analyzing trace with hash -984583334, now seen corresponding path program 1 times [2018-10-24 14:02:36,134 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:02:36,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:02:36,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:36,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:02:36,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:02:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 554 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-10-24 14:02:36,470 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:02:36,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:02:36,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:02:36,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:02:36,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:02:36,471 INFO L87 Difference]: Start difference. First operand 72241 states and 78849 transitions. Second operand 3 states. [2018-10-24 14:02:41,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:02:41,696 INFO L93 Difference]: Finished difference Result 171552 states and 187987 transitions. [2018-10-24 14:02:41,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:02:41,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 473 [2018-10-24 14:02:41,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:02:41,808 INFO L225 Difference]: With dead ends: 171552 [2018-10-24 14:02:41,808 INFO L226 Difference]: Without dead ends: 100065 [2018-10-24 14:02:41,850 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 14:02:41,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100065 states. [2018-10-24 14:02:42,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100065 to 99313. [2018-10-24 14:02:42,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99313 states. [2018-10-24 14:02:43,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99313 states to 99313 states and 108364 transitions. [2018-10-24 14:02:43,309 INFO L78 Accepts]: Start accepts. Automaton has 99313 states and 108364 transitions. Word has length 473 [2018-10-24 14:02:43,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:02:43,310 INFO L481 AbstractCegarLoop]: Abstraction has 99313 states and 108364 transitions. [2018-10-24 14:02:43,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:02:43,310 INFO L276 IsEmpty]: Start isEmpty. Operand 99313 states and 108364 transitions. [2018-10-24 14:02:43,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2018-10-24 14:02:43,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:02:43,333 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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] [2018-10-24 14:02:43,333 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:02:43,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:02:43,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1922668504, now seen corresponding path program 1 times [2018-10-24 14:02:43,334 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:02:43,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:02:43,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:43,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:02:43,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:02:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 639 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-10-24 14:02:43,903 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:02:43,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:02:43,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:02:43,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:02:43,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:02:43,905 INFO L87 Difference]: Start difference. First operand 99313 states and 108364 transitions. Second operand 4 states. [2018-10-24 14:02:52,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:02:52,138 INFO L93 Difference]: Finished difference Result 227200 states and 247775 transitions. [2018-10-24 14:02:52,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:02:52,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 560 [2018-10-24 14:02:52,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:02:52,275 INFO L225 Difference]: With dead ends: 227200 [2018-10-24 14:02:52,275 INFO L226 Difference]: Without dead ends: 128641 [2018-10-24 14:02:52,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 5 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 14:02:52,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128641 states. [2018-10-24 14:02:53,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128641 to 124881. [2018-10-24 14:02:53,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124881 states. [2018-10-24 14:02:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124881 states to 124881 states and 132900 transitions. [2018-10-24 14:02:54,056 INFO L78 Accepts]: Start accepts. Automaton has 124881 states and 132900 transitions. Word has length 560 [2018-10-24 14:02:54,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:02:54,057 INFO L481 AbstractCegarLoop]: Abstraction has 124881 states and 132900 transitions. [2018-10-24 14:02:54,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:02:54,057 INFO L276 IsEmpty]: Start isEmpty. Operand 124881 states and 132900 transitions. [2018-10-24 14:02:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2018-10-24 14:02:54,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:02:54,076 INFO L375 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:02:54,076 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:02:54,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:02:54,077 INFO L82 PathProgramCache]: Analyzing trace with hash -390835553, now seen corresponding path program 1 times [2018-10-24 14:02:54,077 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:02:54,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:02:54,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:54,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:02:54,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:02:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2018-10-24 14:02:54,506 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:02:54,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:02:54,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:02:54,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:02:54,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:02:54,507 INFO L87 Difference]: Start difference. First operand 124881 states and 132900 transitions. Second operand 3 states. [2018-10-24 14:02:59,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:02:59,462 INFO L93 Difference]: Finished difference Result 245992 states and 261908 transitions. [2018-10-24 14:02:59,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:02:59,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 602 [2018-10-24 14:02:59,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:02:59,595 INFO L225 Difference]: With dead ends: 245992 [2018-10-24 14:02:59,596 INFO L226 Difference]: Without dead ends: 121865 [2018-10-24 14:02:59,659 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 14:02:59,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121865 states. [2018-10-24 14:03:01,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121865 to 118105. [2018-10-24 14:03:01,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118105 states. [2018-10-24 14:03:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118105 states to 118105 states and 123821 transitions. [2018-10-24 14:03:01,912 INFO L78 Accepts]: Start accepts. Automaton has 118105 states and 123821 transitions. Word has length 602 [2018-10-24 14:03:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:03:01,913 INFO L481 AbstractCegarLoop]: Abstraction has 118105 states and 123821 transitions. [2018-10-24 14:03:01,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:03:01,914 INFO L276 IsEmpty]: Start isEmpty. Operand 118105 states and 123821 transitions. [2018-10-24 14:03:01,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 854 [2018-10-24 14:03:01,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:03:01,954 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:03:01,954 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:03:01,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:03:01,954 INFO L82 PathProgramCache]: Analyzing trace with hash 290452711, now seen corresponding path program 1 times [2018-10-24 14:03:01,955 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:03:01,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:03:01,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:03:01,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:03:01,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:03:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:03:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 612 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2018-10-24 14:03:02,598 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:03:02,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:03:02,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:03:02,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:03:02,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:03:02,599 INFO L87 Difference]: Start difference. First operand 118105 states and 123821 transitions. Second operand 4 states. [2018-10-24 14:03:10,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:03:10,582 INFO L93 Difference]: Finished difference Result 235456 states and 246883 transitions. [2018-10-24 14:03:10,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:03:10,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 853 [2018-10-24 14:03:10,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:03:10,708 INFO L225 Difference]: With dead ends: 235456 [2018-10-24 14:03:10,709 INFO L226 Difference]: Without dead ends: 118105 [2018-10-24 14:03:10,760 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 14:03:10,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118105 states. [2018-10-24 14:03:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118105 to 112841. [2018-10-24 14:03:13,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112841 states. [2018-10-24 14:03:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112841 states to 112841 states and 117027 transitions. [2018-10-24 14:03:13,093 INFO L78 Accepts]: Start accepts. Automaton has 112841 states and 117027 transitions. Word has length 853 [2018-10-24 14:03:13,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:03:13,094 INFO L481 AbstractCegarLoop]: Abstraction has 112841 states and 117027 transitions. [2018-10-24 14:03:13,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:03:13,094 INFO L276 IsEmpty]: Start isEmpty. Operand 112841 states and 117027 transitions. [2018-10-24 14:03:13,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 929 [2018-10-24 14:03:13,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:03:13,145 INFO L375 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:03:13,145 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:03:13,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:03:13,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1524423949, now seen corresponding path program 1 times [2018-10-24 14:03:13,146 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:03:13,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:03:13,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:03:13,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:03:13,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:03:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:03:14,153 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-24 14:03:14,459 WARN L179 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-10-24 14:03:14,857 WARN L179 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-10-24 14:03:15,269 WARN L179 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-10-24 14:03:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 490 proven. 18 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-10-24 14:03:22,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:03:22,919 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 [2018-10-24 14:03:22,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:03:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:03:23,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:03:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 490 proven. 18 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-10-24 14:03:25,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:03:25,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 12 [2018-10-24 14:03:25,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 14:03:25,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 14:03:25,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-10-24 14:03:25,041 INFO L87 Difference]: Start difference. First operand 112841 states and 117027 transitions. Second operand 12 states. Received shutdown request... [2018-10-24 14:04:26,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 14:04:26,604 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 14:04:26,610 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 14:04:26,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:04:26 BoogieIcfgContainer [2018-10-24 14:04:26,611 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 14:04:26,612 INFO L168 Benchmark]: Toolchain (without parser) took 232957.73 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 3.6 GB in the end (delta: -2.2 GB). Peak memory consumption was 495.8 MB. Max. memory is 7.1 GB. [2018-10-24 14:04:26,613 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 14:04:26,614 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2112.79 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: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. [2018-10-24 14:04:26,615 INFO L168 Benchmark]: Boogie Procedure Inliner took 608.47 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 787.5 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -977.9 MB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. [2018-10-24 14:04:26,616 INFO L168 Benchmark]: Boogie Preprocessor took 338.12 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 42.8 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. [2018-10-24 14:04:26,616 INFO L168 Benchmark]: RCFGBuilder took 9028.68 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 221.2 MB). Free memory was 2.1 GB in the beginning and 2.3 GB in the end (delta: -170.6 MB). Peak memory consumption was 628.2 MB. Max. memory is 7.1 GB. [2018-10-24 14:04:26,617 INFO L168 Benchmark]: TraceAbstraction took 220864.35 ms. Allocated memory was 2.5 GB in the beginning and 4.2 GB in the end (delta: 1.7 GB). Free memory was 2.3 GB in the beginning and 3.6 GB in the end (delta: -1.3 GB). Peak memory consumption was 391.9 MB. Max. memory is 7.1 GB. [2018-10-24 14:04:26,623 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 2112.79 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: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 608.47 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 787.5 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -977.9 MB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 338.12 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 42.8 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9028.68 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 221.2 MB). Free memory was 2.1 GB in the beginning and 2.3 GB in the end (delta: -170.6 MB). Peak memory consumption was 628.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 220864.35 ms. Allocated memory was 2.5 GB in the beginning and 4.2 GB in the end (delta: 1.7 GB). Free memory was 2.3 GB in the beginning and 3.6 GB in the end (delta: -1.3 GB). Peak memory consumption was 391.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 69). Cancelled while BasicCegarLoop was constructing difference of abstraction (112841states) and FLOYD_HOARE automaton (currently 20 states, 12 states before enhancement),while ReachableStatesComputation was computing reachable states (168193 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 819 locations, 1 error locations. TIMEOUT Result, 220.7s OverallTime, 13 OverallIterations, 5 TraceHistogramMax, 188.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 7663 SDtfs, 37152 SDslu, 1257 SDs, 0 SdLazy, 79045 SolverSat, 16303 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 157.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1543 GetRequests, 1468 SyntacticMatches, 16 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124881occurred in iteration=10, 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: 12.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 32360 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 10.1s InterpolantComputationTime, 6696 NumberOfCodeBlocks, 6696 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 6680 ConstructedInterpolants, 19 QuantifiedInterpolants, 21570883 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1807 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 16 InterpolantComputations, 12 PerfectInterpolantSequences, 6470/6517 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown