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_label10_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:19:36,874 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:19:36,876 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:19:36,897 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:19:36,897 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:19:36,898 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:19:36,899 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:19:36,901 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:19:36,903 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:19:36,904 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:19:36,905 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:19:36,905 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:19:36,906 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:19:36,907 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:19:36,908 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:19:36,909 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:19:36,910 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:19:36,912 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:19:36,916 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:19:36,918 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:19:36,920 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:19:36,924 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:19:36,926 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 16:19:36,940 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 16:19:36,971 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:19:36,971 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:19:36,972 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:19:36,975 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:19:36,976 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:19:36,976 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:19:36,976 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:19:36,976 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:19:36,976 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:19:36,977 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:19:36,977 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:19:36,977 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:19:36,977 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:19:36,977 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:19:36,978 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:19:36,978 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:19:36,978 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:19:36,978 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:19:36,978 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:19:36,978 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:19:36,979 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:19:36,979 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:19:36,979 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:19:36,979 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:19:36,979 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:19:36,980 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:19:36,980 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:19:36,980 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:19:37,024 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:19:37,041 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:19:37,045 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:19:37,047 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:19:37,047 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:19:37,048 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label10_true-unreach-call.c [2018-10-24 16:19:37,117 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cecfdbdaa/6849f7ac45784acf8df5ed2bcfe2e283/FLAG6d1e183bf [2018-10-24 16:19:37,906 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:19:37,907 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label10_true-unreach-call.c [2018-10-24 16:19:37,942 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cecfdbdaa/6849f7ac45784acf8df5ed2bcfe2e283/FLAG6d1e183bf [2018-10-24 16:19:37,957 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cecfdbdaa/6849f7ac45784acf8df5ed2bcfe2e283 [2018-10-24 16:19:37,968 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:19:37,969 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:19:37,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:19:37,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:19:37,975 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:19:37,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:19:37" (1/1) ... [2018-10-24 16:19:37,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@639b200f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:37, skipping insertion in model container [2018-10-24 16:19:37,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:19:37" (1/1) ... [2018-10-24 16:19:37,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:19:38,193 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:19:39,633 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:19:39,640 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:19:40,387 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:19:40,422 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:19:40,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:40 WrapperNode [2018-10-24 16:19:40,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:19:40,425 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:19:40,425 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:19:40,425 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:19:40,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:40" (1/1) ... [2018-10-24 16:19:40,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:40" (1/1) ... [2018-10-24 16:19:41,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:19:41,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:19:41,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:19:41,280 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:19:41,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:40" (1/1) ... [2018-10-24 16:19:41,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:40" (1/1) ... [2018-10-24 16:19:41,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:40" (1/1) ... [2018-10-24 16:19:41,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:40" (1/1) ... [2018-10-24 16:19:41,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:40" (1/1) ... [2018-10-24 16:19:41,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:40" (1/1) ... [2018-10-24 16:19:41,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:40" (1/1) ... [2018-10-24 16:19:41,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:19:41,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:19:41,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:19:41,762 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:19:41,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:40" (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 16:19:41,841 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:19:41,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:19:41,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:19:56,527 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:19:56,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:19:56 BoogieIcfgContainer [2018-10-24 16:19:56,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:19:56,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:19:56,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:19:56,532 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:19:56,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:19:37" (1/3) ... [2018-10-24 16:19:56,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306ee262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:19:56, skipping insertion in model container [2018-10-24 16:19:56,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:40" (2/3) ... [2018-10-24 16:19:56,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306ee262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:19:56, skipping insertion in model container [2018-10-24 16:19:56,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:19:56" (3/3) ... [2018-10-24 16:19:56,536 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label10_true-unreach-call.c [2018-10-24 16:19:56,546 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:19:56,557 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:19:56,575 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:19:56,619 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:19:56,620 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:19:56,620 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:19:56,620 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:19:56,620 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:19:56,620 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:19:56,621 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:19:56,621 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:19:56,621 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:19:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states. [2018-10-24 16:19:56,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-24 16:19:56,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:19:56,670 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:19:56,673 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:19:56,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:19:56,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1660793902, now seen corresponding path program 1 times [2018-10-24 16:19:56,681 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:19:56,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:19:56,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:19:56,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:19:56,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:19:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:19:57,136 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 16:19:57,237 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 16:19:57,240 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:19:57,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:19:57,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:19:57,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:19:57,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:19:57,285 INFO L87 Difference]: Start difference. First operand 1099 states. Second operand 4 states. [2018-10-24 16:20:15,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:20:15,156 INFO L93 Difference]: Finished difference Result 3879 states and 7287 transitions. [2018-10-24 16:20:15,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:20:15,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2018-10-24 16:20:15,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:20:15,203 INFO L225 Difference]: With dead ends: 3879 [2018-10-24 16:20:15,203 INFO L226 Difference]: Without dead ends: 2773 [2018-10-24 16:20:15,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 16:20:15,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2018-10-24 16:20:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 2742. [2018-10-24 16:20:15,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2742 states. [2018-10-24 16:20:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2742 states to 2742 states and 4466 transitions. [2018-10-24 16:20:15,386 INFO L78 Accepts]: Start accepts. Automaton has 2742 states and 4466 transitions. Word has length 48 [2018-10-24 16:20:15,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:20:15,387 INFO L481 AbstractCegarLoop]: Abstraction has 2742 states and 4466 transitions. [2018-10-24 16:20:15,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:20:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2742 states and 4466 transitions. [2018-10-24 16:20:15,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-24 16:20:15,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:20:15,394 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:15,395 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:20:15,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:20:15,395 INFO L82 PathProgramCache]: Analyzing trace with hash 732782270, now seen corresponding path program 1 times [2018-10-24 16:20:15,395 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:20:15,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:20:15,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:20:15,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:20:15,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:20:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:20:16,239 WARN L179 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 10 [2018-10-24 16:20:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:20:16,295 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:20:16,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:20:16,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:20:16,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:20:16,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:20:16,298 INFO L87 Difference]: Start difference. First operand 2742 states and 4466 transitions. Second operand 5 states. [2018-10-24 16:20:34,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:20:34,562 INFO L93 Difference]: Finished difference Result 7903 states and 11941 transitions. [2018-10-24 16:20:34,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:20:34,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 138 [2018-10-24 16:20:34,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:20:34,594 INFO L225 Difference]: With dead ends: 7903 [2018-10-24 16:20:34,594 INFO L226 Difference]: Without dead ends: 5163 [2018-10-24 16:20:34,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:20:34,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5163 states. [2018-10-24 16:20:34,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5163 to 4329. [2018-10-24 16:20:34,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4329 states. [2018-10-24 16:20:34,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4329 states to 4329 states and 6259 transitions. [2018-10-24 16:20:34,689 INFO L78 Accepts]: Start accepts. Automaton has 4329 states and 6259 transitions. Word has length 138 [2018-10-24 16:20:34,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:20:34,690 INFO L481 AbstractCegarLoop]: Abstraction has 4329 states and 6259 transitions. [2018-10-24 16:20:34,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:20:34,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4329 states and 6259 transitions. [2018-10-24 16:20:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-24 16:20:34,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:20:34,694 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:34,694 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:20:34,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:20:34,695 INFO L82 PathProgramCache]: Analyzing trace with hash -521279062, now seen corresponding path program 1 times [2018-10-24 16:20:34,695 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:20:34,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:20:34,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:20:34,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:20:34,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:20:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:20:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:20:34,910 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:20:34,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:20:34,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:20:34,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:20:34,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:20:34,912 INFO L87 Difference]: Start difference. First operand 4329 states and 6259 transitions. Second operand 4 states. [2018-10-24 16:20:46,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:20:46,048 INFO L93 Difference]: Finished difference Result 15814 states and 23234 transitions. [2018-10-24 16:20:46,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:20:46,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2018-10-24 16:20:46,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:20:46,103 INFO L225 Difference]: With dead ends: 15814 [2018-10-24 16:20:46,103 INFO L226 Difference]: Without dead ends: 11487 [2018-10-24 16:20:46,110 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 16:20:46,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11487 states. [2018-10-24 16:20:46,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11487 to 11481. [2018-10-24 16:20:46,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11481 states. [2018-10-24 16:20:46,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11481 states to 11481 states and 15626 transitions. [2018-10-24 16:20:46,313 INFO L78 Accepts]: Start accepts. Automaton has 11481 states and 15626 transitions. Word has length 149 [2018-10-24 16:20:46,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:20:46,314 INFO L481 AbstractCegarLoop]: Abstraction has 11481 states and 15626 transitions. [2018-10-24 16:20:46,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:20:46,314 INFO L276 IsEmpty]: Start isEmpty. Operand 11481 states and 15626 transitions. [2018-10-24 16:20:46,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-24 16:20:46,318 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:20:46,318 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 16:20:46,319 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:20:46,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:20:46,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1137953308, now seen corresponding path program 1 times [2018-10-24 16:20:46,319 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:20:46,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:20:46,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:20:46,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:20:46,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:20:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:20:46,771 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-24 16:20:46,998 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2018-10-24 16:20:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 113 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-10-24 16:20:47,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:20:47,106 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 16:20:47,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:20:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:20:47,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:20:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-10-24 16:20:47,439 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:20:47,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2018-10-24 16:20:47,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:20:47,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:20:47,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:20:47,442 INFO L87 Difference]: Start difference. First operand 11481 states and 15626 transitions. Second operand 6 states. [2018-10-24 16:21:08,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:21:08,855 INFO L93 Difference]: Finished difference Result 57631 states and 78123 transitions. [2018-10-24 16:21:08,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:21:08,858 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 211 [2018-10-24 16:21:08,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:21:08,993 INFO L225 Difference]: With dead ends: 57631 [2018-10-24 16:21:08,993 INFO L226 Difference]: Without dead ends: 46152 [2018-10-24 16:21:09,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:21:09,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46152 states. [2018-10-24 16:21:09,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46152 to 46150. [2018-10-24 16:21:09,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46150 states. [2018-10-24 16:21:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46150 states to 46150 states and 54728 transitions. [2018-10-24 16:21:09,863 INFO L78 Accepts]: Start accepts. Automaton has 46150 states and 54728 transitions. Word has length 211 [2018-10-24 16:21:09,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:21:09,863 INFO L481 AbstractCegarLoop]: Abstraction has 46150 states and 54728 transitions. [2018-10-24 16:21:09,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 16:21:09,864 INFO L276 IsEmpty]: Start isEmpty. Operand 46150 states and 54728 transitions. [2018-10-24 16:21:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-10-24 16:21:09,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:21:09,884 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:21:09,885 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:21:09,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:21:09,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1213036563, now seen corresponding path program 1 times [2018-10-24 16:21:09,885 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:21:09,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:21:09,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:21:09,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:21:09,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:21:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:21:10,624 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 16:21:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 516 proven. 9 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2018-10-24 16:21:10,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:21:10,852 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 16:21:10,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:21:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:21:11,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:21:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 516 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2018-10-24 16:21:11,267 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:21:11,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-24 16:21:11,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:21:11,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:21:11,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:21:11,269 INFO L87 Difference]: Start difference. First operand 46150 states and 54728 transitions. Second operand 5 states. [2018-10-24 16:21:26,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:21:26,225 INFO L93 Difference]: Finished difference Result 110441 states and 133773 transitions. [2018-10-24 16:21:26,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:21:26,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 408 [2018-10-24 16:21:26,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:21:26,339 INFO L225 Difference]: With dead ends: 110441 [2018-10-24 16:21:26,340 INFO L226 Difference]: Without dead ends: 65081 [2018-10-24 16:21:26,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 408 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:21:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65081 states. [2018-10-24 16:21:27,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65081 to 65058. [2018-10-24 16:21:27,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65058 states. [2018-10-24 16:21:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65058 states to 65058 states and 75080 transitions. [2018-10-24 16:21:27,251 INFO L78 Accepts]: Start accepts. Automaton has 65058 states and 75080 transitions. Word has length 408 [2018-10-24 16:21:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:21:27,252 INFO L481 AbstractCegarLoop]: Abstraction has 65058 states and 75080 transitions. [2018-10-24 16:21:27,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:21:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 65058 states and 75080 transitions. [2018-10-24 16:21:27,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-24 16:21:27,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:21:27,273 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:27,273 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:21:27,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:21:27,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1975342543, now seen corresponding path program 1 times [2018-10-24 16:21:27,274 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:21:27,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:21:27,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:21:27,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:21:27,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:21:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:21:27,904 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-24 16:21:28,890 WARN L179 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2018-10-24 16:21:29,057 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 4 [2018-10-24 16:21:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 378 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-10-24 16:21:29,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:21:29,401 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 16:21:29,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:21:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:21:29,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:21:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 382 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-10-24 16:21:30,157 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:21:30,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-24 16:21:30,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:21:30,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:21:30,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:21:30,159 INFO L87 Difference]: Start difference. First operand 65058 states and 75080 transitions. Second operand 8 states. [2018-10-24 16:21:30,446 WARN L179 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2018-10-24 16:21:53,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:21:53,972 INFO L93 Difference]: Finished difference Result 170316 states and 196492 transitions. [2018-10-24 16:21:53,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 16:21:53,972 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 411 [2018-10-24 16:21:53,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:21:54,179 INFO L225 Difference]: With dead ends: 170316 [2018-10-24 16:21:54,179 INFO L226 Difference]: Without dead ends: 106048 [2018-10-24 16:21:54,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 415 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-10-24 16:21:54,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106048 states. [2018-10-24 16:21:55,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106048 to 98935. [2018-10-24 16:21:55,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98935 states. [2018-10-24 16:21:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98935 states to 98935 states and 110632 transitions. [2018-10-24 16:21:55,477 INFO L78 Accepts]: Start accepts. Automaton has 98935 states and 110632 transitions. Word has length 411 [2018-10-24 16:21:55,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:21:55,478 INFO L481 AbstractCegarLoop]: Abstraction has 98935 states and 110632 transitions. [2018-10-24 16:21:55,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 16:21:55,478 INFO L276 IsEmpty]: Start isEmpty. Operand 98935 states and 110632 transitions. [2018-10-24 16:21:55,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2018-10-24 16:21:55,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:21:55,508 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:21:55,508 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:21:55,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:21:55,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1539898024, now seen corresponding path program 1 times [2018-10-24 16:21:55,509 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:21:55,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:21:55,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:21:55,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:21:55,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:21:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:21:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 468 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-10-24 16:21:56,383 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:21:56,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:21:56,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:21:56,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:21:56,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:21:56,390 INFO L87 Difference]: Start difference. First operand 98935 states and 110632 transitions. Second operand 3 states. [2018-10-24 16:22:02,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:22:02,297 INFO L93 Difference]: Finished difference Result 197064 states and 220335 transitions. [2018-10-24 16:22:02,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:22:02,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 438 [2018-10-24 16:22:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:22:02,421 INFO L225 Difference]: With dead ends: 197064 [2018-10-24 16:22:02,421 INFO L226 Difference]: Without dead ends: 84685 [2018-10-24 16:22:02,488 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 16:22:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84685 states. [2018-10-24 16:22:03,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84685 to 83107. [2018-10-24 16:22:03,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83107 states. [2018-10-24 16:22:03,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83107 states to 83107 states and 90075 transitions. [2018-10-24 16:22:03,416 INFO L78 Accepts]: Start accepts. Automaton has 83107 states and 90075 transitions. Word has length 438 [2018-10-24 16:22:03,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:22:03,417 INFO L481 AbstractCegarLoop]: Abstraction has 83107 states and 90075 transitions. [2018-10-24 16:22:03,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:22:03,417 INFO L276 IsEmpty]: Start isEmpty. Operand 83107 states and 90075 transitions. [2018-10-24 16:22:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2018-10-24 16:22:03,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:22:03,439 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:22:03,439 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:22:03,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:22:03,439 INFO L82 PathProgramCache]: Analyzing trace with hash 770055196, now seen corresponding path program 1 times [2018-10-24 16:22:03,439 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:22:03,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:22:03,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:22:03,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:22:03,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:22:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:22:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 9 proven. 82 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-10-24 16:22:04,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:22:04,247 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:22:04,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:22:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:22:04,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:22:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-10-24 16:22:05,288 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:22:05,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2018-10-24 16:22:05,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:22:05,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:22:05,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:22:05,290 INFO L87 Difference]: Start difference. First operand 83107 states and 90075 transitions. Second operand 5 states. [2018-10-24 16:22:23,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:22:23,167 INFO L93 Difference]: Finished difference Result 238758 states and 258829 transitions. [2018-10-24 16:22:23,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:22:23,167 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 454 [2018-10-24 16:22:23,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:22:23,336 INFO L225 Difference]: With dead ends: 238758 [2018-10-24 16:22:23,337 INFO L226 Difference]: Without dead ends: 156441 [2018-10-24 16:22:23,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 453 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:22:23,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156441 states. [2018-10-24 16:22:25,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156441 to 149334. [2018-10-24 16:22:25,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149334 states. [2018-10-24 16:22:25,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149334 states to 149334 states and 159354 transitions. [2018-10-24 16:22:25,348 INFO L78 Accepts]: Start accepts. Automaton has 149334 states and 159354 transitions. Word has length 454 [2018-10-24 16:22:25,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:22:25,349 INFO L481 AbstractCegarLoop]: Abstraction has 149334 states and 159354 transitions. [2018-10-24 16:22:25,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:22:25,349 INFO L276 IsEmpty]: Start isEmpty. Operand 149334 states and 159354 transitions. [2018-10-24 16:22:25,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2018-10-24 16:22:25,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:22:25,373 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-24 16:22:25,373 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:22:25,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:22:25,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1972376893, now seen corresponding path program 1 times [2018-10-24 16:22:25,374 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:22:25,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:22:25,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:22:25,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:22:25,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:22:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:22:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 568 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2018-10-24 16:22:25,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:22:25,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:22:25,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:22:25,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:22:25,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:22:25,831 INFO L87 Difference]: Start difference. First operand 149334 states and 159354 transitions. Second operand 5 states. [2018-10-24 16:22:43,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:22:43,543 INFO L93 Difference]: Finished difference Result 458922 states and 490373 transitions. [2018-10-24 16:22:43,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:22:43,543 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 499 [2018-10-24 16:22:43,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:22:43,945 INFO L225 Difference]: With dead ends: 458922 [2018-10-24 16:22:43,945 INFO L226 Difference]: Without dead ends: 310378 [2018-10-24 16:22:44,077 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 16:22:44,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310378 states. [2018-10-24 16:22:47,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310378 to 286526. [2018-10-24 16:22:47,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286526 states. [2018-10-24 16:22:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286526 states to 286526 states and 304148 transitions. [2018-10-24 16:22:47,915 INFO L78 Accepts]: Start accepts. Automaton has 286526 states and 304148 transitions. Word has length 499 [2018-10-24 16:22:47,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:22:47,915 INFO L481 AbstractCegarLoop]: Abstraction has 286526 states and 304148 transitions. [2018-10-24 16:22:47,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:22:47,918 INFO L276 IsEmpty]: Start isEmpty. Operand 286526 states and 304148 transitions. [2018-10-24 16:22:47,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-10-24 16:22:47,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:22:47,937 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:22:47,938 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:22:47,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:22:47,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1661633254, now seen corresponding path program 1 times [2018-10-24 16:22:47,938 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:22:47,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:22:47,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:22:47,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:22:47,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:22:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:22:48,670 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-24 16:22:49,233 WARN L179 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2018-10-24 16:22:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 54 proven. 497 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-10-24 16:22:51,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:22:51,718 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:22:51,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:22:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:22:51,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:22:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 453 proven. 0 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-10-24 16:22:52,284 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:22:52,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 13 [2018-10-24 16:22:52,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 16:22:52,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 16:22:52,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-10-24 16:22:52,286 INFO L87 Difference]: Start difference. First operand 286526 states and 304148 transitions. Second operand 13 states. [2018-10-24 16:22:52,675 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 21 Received shutdown request... [2018-10-24 16:23:24,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 16:23:24,985 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:23:24,990 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:23:24,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:23:24 BoogieIcfgContainer [2018-10-24 16:23:24,990 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:23:24,991 INFO L168 Benchmark]: Toolchain (without parser) took 227022.77 ms. Allocated memory was 1.5 GB in the beginning and 3.3 GB in the end (delta: 1.7 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: -21.6 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-24 16:23:24,992 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 16:23:24,993 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2453.30 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 16:23:24,993 INFO L168 Benchmark]: Boogie Procedure Inliner took 854.77 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 846.7 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 16:23:24,994 INFO L168 Benchmark]: Boogie Preprocessor took 481.82 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 69.0 MB). Peak memory consumption was 69.0 MB. Max. memory is 7.1 GB. [2018-10-24 16:23:24,995 INFO L168 Benchmark]: RCFGBuilder took 14766.21 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 234.4 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 47.1 MB). Peak memory consumption was 593.7 MB. Max. memory is 7.1 GB. [2018-10-24 16:23:24,996 INFO L168 Benchmark]: TraceAbstraction took 208461.52 ms. Allocated memory was 2.6 GB in the beginning and 3.3 GB in the end (delta: 652.7 MB). Free memory was 2.1 GB in the beginning and 1.4 GB in the end (delta: 655.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-24 16:23:25,001 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 2453.30 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 854.77 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 846.7 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 481.82 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 69.0 MB). Peak memory consumption was 69.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 14766.21 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 234.4 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 47.1 MB). Peak memory consumption was 593.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 208461.52 ms. Allocated memory was 2.6 GB in the beginning and 3.3 GB in the end (delta: 652.7 MB). Free memory was 2.1 GB in the beginning and 1.4 GB in the end (delta: 655.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 153]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 153). Cancelled while BasicCegarLoop was constructing difference of abstraction (286526states) and FLOYD_HOARE automaton (currently 14 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (137641 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 1099 locations, 1 error locations. TIMEOUT Result, 208.3s OverallTime, 10 OverallIterations, 5 TraceHistogramMax, 183.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 8048 SDtfs, 44156 SDslu, 4757 SDs, 0 SdLazy, 89953 SolverSat, 15734 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 152.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2094 GetRequests, 2030 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 6.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=286526occurred in iteration=9, 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: 10.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 40546 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 9.3s InterpolantComputationTime, 5302 NumberOfCodeBlocks, 5302 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 5287 ConstructedInterpolants, 0 QuantifiedInterpolants, 9151924 SizeOfPredicates, 2 NumberOfNonLiveVariables, 2647 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 15 InterpolantComputations, 10 PerfectInterpolantSequences, 5437/6033 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown