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/Problem11_label50_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:07:46,933 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:07:46,937 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:07:46,949 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:07:46,949 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:07:46,950 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:07:46,952 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:07:46,953 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:07:46,955 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:07:46,956 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:07:46,957 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:07:46,957 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:07:46,958 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:07:46,959 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:07:46,960 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:07:46,961 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:07:46,962 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:07:46,964 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:07:46,966 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:07:46,968 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:07:46,969 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:07:46,970 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:07:46,973 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 16:07:46,986 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 16:07:47,012 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:07:47,012 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:07:47,013 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:07:47,013 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:07:47,014 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:07:47,014 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:07:47,014 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:07:47,015 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:07:47,015 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:07:47,015 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:07:47,015 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:07:47,015 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:07:47,016 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:07:47,016 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:07:47,016 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:07:47,016 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:07:47,016 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:07:47,017 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:07:47,017 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:07:47,017 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:07:47,017 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:07:47,017 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:07:47,018 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:07:47,018 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:07:47,018 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:07:47,018 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:07:47,018 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:07:47,019 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:07:47,064 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:07:47,076 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:07:47,080 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:07:47,081 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:07:47,082 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:07:47,082 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label50_true-unreach-call.c [2018-10-24 16:07:47,142 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b12ef095b/840490c566ef4f8bb54498a8d33f415d/FLAG58b16d0e4 [2018-10-24 16:07:47,720 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:07:47,721 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label50_true-unreach-call.c [2018-10-24 16:07:47,753 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b12ef095b/840490c566ef4f8bb54498a8d33f415d/FLAG58b16d0e4 [2018-10-24 16:07:47,776 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b12ef095b/840490c566ef4f8bb54498a8d33f415d [2018-10-24 16:07:47,790 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:07:47,792 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:07:47,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:07:47,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:07:47,800 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:07:47,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:07:47" (1/1) ... [2018-10-24 16:07:47,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64b8a232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:47, skipping insertion in model container [2018-10-24 16:07:47,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:07:47" (1/1) ... [2018-10-24 16:07:47,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:07:47,901 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:07:48,549 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:07:48,556 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:07:48,743 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:07:48,762 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:07:48,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:48 WrapperNode [2018-10-24 16:07:48,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:07:48,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:07:48,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:07:48,764 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:07:48,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:48" (1/1) ... [2018-10-24 16:07:48,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:48" (1/1) ... [2018-10-24 16:07:49,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:07:49,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:07:49,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:07:49,059 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:07:49,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:48" (1/1) ... [2018-10-24 16:07:49,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:48" (1/1) ... [2018-10-24 16:07:49,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:48" (1/1) ... [2018-10-24 16:07:49,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:48" (1/1) ... [2018-10-24 16:07:49,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:48" (1/1) ... [2018-10-24 16:07:49,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:48" (1/1) ... [2018-10-24 16:07:49,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:48" (1/1) ... [2018-10-24 16:07:49,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:07:49,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:07:49,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:07:49,204 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:07:49,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:48" (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 16:07:49,278 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:07:49,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:07:49,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:07:54,261 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:07:54,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:07:54 BoogieIcfgContainer [2018-10-24 16:07:54,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:07:54,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:07:54,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:07:54,267 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:07:54,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:07:47" (1/3) ... [2018-10-24 16:07:54,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c599b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:07:54, skipping insertion in model container [2018-10-24 16:07:54,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:48" (2/3) ... [2018-10-24 16:07:54,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c599b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:07:54, skipping insertion in model container [2018-10-24 16:07:54,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:07:54" (3/3) ... [2018-10-24 16:07:54,271 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label50_true-unreach-call.c [2018-10-24 16:07:54,281 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:07:54,290 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:07:54,307 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:07:54,344 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:07:54,345 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:07:54,345 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:07:54,345 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:07:54,345 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:07:54,345 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:07:54,346 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:07:54,346 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:07:54,346 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:07:54,374 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states. [2018-10-24 16:07:54,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-24 16:07:54,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:07:54,393 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] [2018-10-24 16:07:54,396 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:07:54,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:07:54,403 INFO L82 PathProgramCache]: Analyzing trace with hash 680225122, now seen corresponding path program 1 times [2018-10-24 16:07:54,405 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:07:54,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:07:54,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:54,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:07:54,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:07:54,917 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-24 16:07:54,933 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 16:07:54,936 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:07:54,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:07:54,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:07:54,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:07:54,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:07:54,961 INFO L87 Difference]: Start difference. First operand 284 states. Second operand 4 states. [2018-10-24 16:07:58,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:07:58,335 INFO L93 Difference]: Finished difference Result 977 states and 1747 transitions. [2018-10-24 16:07:58,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:07:58,338 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-10-24 16:07:58,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:07:58,362 INFO L225 Difference]: With dead ends: 977 [2018-10-24 16:07:58,362 INFO L226 Difference]: Without dead ends: 686 [2018-10-24 16:07:58,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:07:58,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2018-10-24 16:07:58,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 683. [2018-10-24 16:07:58,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2018-10-24 16:07:58,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1060 transitions. [2018-10-24 16:07:58,460 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1060 transitions. Word has length 37 [2018-10-24 16:07:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:07:58,460 INFO L481 AbstractCegarLoop]: Abstraction has 683 states and 1060 transitions. [2018-10-24 16:07:58,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:07:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1060 transitions. [2018-10-24 16:07:58,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-24 16:07:58,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:07:58,468 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:07:58,469 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:07:58,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:07:58,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1815459254, now seen corresponding path program 1 times [2018-10-24 16:07:58,469 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:07:58,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:07:58,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:58,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:07:58,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:07:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:07:58,716 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:07:58,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:07:58,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:07:58,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:07:58,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:07:58,719 INFO L87 Difference]: Start difference. First operand 683 states and 1060 transitions. Second operand 4 states. [2018-10-24 16:08:05,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:08:05,251 INFO L93 Difference]: Finished difference Result 2492 states and 3982 transitions. [2018-10-24 16:08:05,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:08:05,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2018-10-24 16:08:05,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:08:05,262 INFO L225 Difference]: With dead ends: 2492 [2018-10-24 16:08:05,263 INFO L226 Difference]: Without dead ends: 1811 [2018-10-24 16:08:05,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:08:05,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2018-10-24 16:08:05,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1795. [2018-10-24 16:08:05,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1795 states. [2018-10-24 16:08:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 2640 transitions. [2018-10-24 16:08:05,326 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 2640 transitions. Word has length 106 [2018-10-24 16:08:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:08:05,327 INFO L481 AbstractCegarLoop]: Abstraction has 1795 states and 2640 transitions. [2018-10-24 16:08:05,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:08:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 2640 transitions. [2018-10-24 16:08:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-24 16:08:05,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:08:05,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:08:05,332 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:08:05,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:08:05,333 INFO L82 PathProgramCache]: Analyzing trace with hash -759476949, now seen corresponding path program 1 times [2018-10-24 16:08:05,333 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:08:05,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:08:05,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:05,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:05,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:08:05,545 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:08:05,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:08:05,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:08:05,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:08:05,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:08:05,547 INFO L87 Difference]: Start difference. First operand 1795 states and 2640 transitions. Second operand 4 states. [2018-10-24 16:08:08,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:08:08,558 INFO L93 Difference]: Finished difference Result 6742 states and 10027 transitions. [2018-10-24 16:08:08,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:08:08,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2018-10-24 16:08:08,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:08:08,587 INFO L225 Difference]: With dead ends: 6742 [2018-10-24 16:08:08,587 INFO L226 Difference]: Without dead ends: 4949 [2018-10-24 16:08:08,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:08:08,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4949 states. [2018-10-24 16:08:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4949 to 4949. [2018-10-24 16:08:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4949 states. [2018-10-24 16:08:08,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4949 states to 4949 states and 6496 transitions. [2018-10-24 16:08:08,681 INFO L78 Accepts]: Start accepts. Automaton has 4949 states and 6496 transitions. Word has length 132 [2018-10-24 16:08:08,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:08:08,682 INFO L481 AbstractCegarLoop]: Abstraction has 4949 states and 6496 transitions. [2018-10-24 16:08:08,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:08:08,682 INFO L276 IsEmpty]: Start isEmpty. Operand 4949 states and 6496 transitions. [2018-10-24 16:08:08,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-24 16:08:08,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:08:08,685 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:08:08,686 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:08:08,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:08:08,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1823808628, now seen corresponding path program 1 times [2018-10-24 16:08:08,686 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:08:08,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:08:08,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:08,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:08,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:08:09,069 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:08:09,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:08:09,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:08:09,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:08:09,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:08:09,071 INFO L87 Difference]: Start difference. First operand 4949 states and 6496 transitions. Second operand 4 states. [2018-10-24 16:08:13,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:08:13,597 INFO L93 Difference]: Finished difference Result 11401 states and 15111 transitions. [2018-10-24 16:08:13,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:08:13,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 165 [2018-10-24 16:08:13,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:08:13,627 INFO L225 Difference]: With dead ends: 11401 [2018-10-24 16:08:13,627 INFO L226 Difference]: Without dead ends: 6639 [2018-10-24 16:08:13,635 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 16:08:13,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6639 states. [2018-10-24 16:08:13,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6639 to 6615. [2018-10-24 16:08:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6615 states. [2018-10-24 16:08:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6615 states to 6615 states and 8370 transitions. [2018-10-24 16:08:13,807 INFO L78 Accepts]: Start accepts. Automaton has 6615 states and 8370 transitions. Word has length 165 [2018-10-24 16:08:13,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:08:13,808 INFO L481 AbstractCegarLoop]: Abstraction has 6615 states and 8370 transitions. [2018-10-24 16:08:13,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:08:13,808 INFO L276 IsEmpty]: Start isEmpty. Operand 6615 states and 8370 transitions. [2018-10-24 16:08:13,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-10-24 16:08:13,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:08:13,816 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:08:13,816 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:08:13,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:08:13,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1696192220, now seen corresponding path program 1 times [2018-10-24 16:08:13,818 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:08:13,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:08:13,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:13,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:13,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 90 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:08:14,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:08:14,598 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 16:08:14,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:14,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:08:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:08:15,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:08:15,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2018-10-24 16:08:15,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:08:15,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:08:15,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:08:15,675 INFO L87 Difference]: Start difference. First operand 6615 states and 8370 transitions. Second operand 8 states. [2018-10-24 16:08:15,983 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 12 [2018-10-24 16:08:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:08:26,632 INFO L93 Difference]: Finished difference Result 27756 states and 35762 transitions. [2018-10-24 16:08:26,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 16:08:26,632 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 251 [2018-10-24 16:08:26,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:08:26,711 INFO L225 Difference]: With dead ends: 27756 [2018-10-24 16:08:26,711 INFO L226 Difference]: Without dead ends: 21328 [2018-10-24 16:08:26,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-10-24 16:08:26,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21328 states. [2018-10-24 16:08:27,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21328 to 18700. [2018-10-24 16:08:27,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18700 states. [2018-10-24 16:08:27,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18700 states to 18700 states and 22521 transitions. [2018-10-24 16:08:27,060 INFO L78 Accepts]: Start accepts. Automaton has 18700 states and 22521 transitions. Word has length 251 [2018-10-24 16:08:27,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:08:27,060 INFO L481 AbstractCegarLoop]: Abstraction has 18700 states and 22521 transitions. [2018-10-24 16:08:27,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 16:08:27,061 INFO L276 IsEmpty]: Start isEmpty. Operand 18700 states and 22521 transitions. [2018-10-24 16:08:27,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-10-24 16:08:27,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:08:27,069 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:08:27,069 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:08:27,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:08:27,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1649115641, now seen corresponding path program 1 times [2018-10-24 16:08:27,070 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:08:27,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:08:27,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:27,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:27,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:27,621 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:08:27,621 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:08:27,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:08:27,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:08:27,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:08:27,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:08:27,623 INFO L87 Difference]: Start difference. First operand 18700 states and 22521 transitions. Second operand 5 states. [2018-10-24 16:08:32,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:08:32,010 INFO L93 Difference]: Finished difference Result 51142 states and 62154 transitions. [2018-10-24 16:08:32,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:08:32,010 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 251 [2018-10-24 16:08:32,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:08:32,056 INFO L225 Difference]: With dead ends: 51142 [2018-10-24 16:08:32,056 INFO L226 Difference]: Without dead ends: 24004 [2018-10-24 16:08:32,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 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 16:08:32,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24004 states. [2018-10-24 16:08:32,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24004 to 22892. [2018-10-24 16:08:32,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22892 states. [2018-10-24 16:08:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22892 states to 22892 states and 25942 transitions. [2018-10-24 16:08:32,415 INFO L78 Accepts]: Start accepts. Automaton has 22892 states and 25942 transitions. Word has length 251 [2018-10-24 16:08:32,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:08:32,415 INFO L481 AbstractCegarLoop]: Abstraction has 22892 states and 25942 transitions. [2018-10-24 16:08:32,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:08:32,415 INFO L276 IsEmpty]: Start isEmpty. Operand 22892 states and 25942 transitions. [2018-10-24 16:08:32,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-10-24 16:08:32,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:08:32,421 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 16:08:32,422 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:08:32,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:08:32,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1541679735, now seen corresponding path program 1 times [2018-10-24 16:08:32,422 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:08:32,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:08:32,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:32,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:32,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:32,881 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-24 16:08:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:08:32,985 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:08:32,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:08:32,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:08:32,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:08:32,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:08:32,987 INFO L87 Difference]: Start difference. First operand 22892 states and 25942 transitions. Second operand 5 states. [2018-10-24 16:08:35,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:08:35,043 INFO L93 Difference]: Finished difference Result 45078 states and 51350 transitions. [2018-10-24 16:08:35,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:08:35,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 256 [2018-10-24 16:08:35,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:08:35,092 INFO L225 Difference]: With dead ends: 45078 [2018-10-24 16:08:35,092 INFO L226 Difference]: Without dead ends: 25711 [2018-10-24 16:08:35,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 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 16:08:35,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25711 states. [2018-10-24 16:08:35,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25711 to 23643. [2018-10-24 16:08:35,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23643 states. [2018-10-24 16:08:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23643 states to 23643 states and 26570 transitions. [2018-10-24 16:08:35,391 INFO L78 Accepts]: Start accepts. Automaton has 23643 states and 26570 transitions. Word has length 256 [2018-10-24 16:08:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:08:35,392 INFO L481 AbstractCegarLoop]: Abstraction has 23643 states and 26570 transitions. [2018-10-24 16:08:35,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:08:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 23643 states and 26570 transitions. [2018-10-24 16:08:35,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-10-24 16:08:35,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:08:35,400 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:08:35,400 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:08:35,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:08:35,401 INFO L82 PathProgramCache]: Analyzing trace with hash 392874201, now seen corresponding path program 1 times [2018-10-24 16:08:35,401 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:08:35,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:08:35,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:35,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:35,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:08:35,816 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:08:35,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:08:35,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:08:35,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:08:35,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:08:35,817 INFO L87 Difference]: Start difference. First operand 23643 states and 26570 transitions. Second operand 4 states. [2018-10-24 16:08:37,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:08:37,817 INFO L93 Difference]: Finished difference Result 49695 states and 55875 transitions. [2018-10-24 16:08:37,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:08:37,817 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 272 [2018-10-24 16:08:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:08:37,849 INFO L225 Difference]: With dead ends: 49695 [2018-10-24 16:08:37,849 INFO L226 Difference]: Without dead ends: 24931 [2018-10-24 16:08:37,867 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 16:08:37,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24931 states. [2018-10-24 16:08:38,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24931 to 22882. [2018-10-24 16:08:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22882 states. [2018-10-24 16:08:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22882 states to 22882 states and 25414 transitions. [2018-10-24 16:08:38,125 INFO L78 Accepts]: Start accepts. Automaton has 22882 states and 25414 transitions. Word has length 272 [2018-10-24 16:08:38,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:08:38,125 INFO L481 AbstractCegarLoop]: Abstraction has 22882 states and 25414 transitions. [2018-10-24 16:08:38,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:08:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 22882 states and 25414 transitions. [2018-10-24 16:08:38,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-10-24 16:08:38,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:08:38,137 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:08:38,137 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:08:38,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:08:38,137 INFO L82 PathProgramCache]: Analyzing trace with hash 100928380, now seen corresponding path program 1 times [2018-10-24 16:08:38,138 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:08:38,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:08:38,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:38,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:38,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:38,514 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 16:08:38,749 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2018-10-24 16:08:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 30 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:08:39,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:08:39,021 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 16:08:39,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:39,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:08:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2018-10-24 16:08:39,240 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:08:39,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2018-10-24 16:08:39,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:08:39,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:08:39,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:08:39,243 INFO L87 Difference]: Start difference. First operand 22882 states and 25414 transitions. Second operand 9 states. [2018-10-24 16:08:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:08:46,153 INFO L93 Difference]: Finished difference Result 56141 states and 62195 transitions. [2018-10-24 16:08:46,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 16:08:46,154 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 319 [2018-10-24 16:08:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:08:46,185 INFO L225 Difference]: With dead ends: 56141 [2018-10-24 16:08:46,186 INFO L226 Difference]: Without dead ends: 32884 [2018-10-24 16:08:46,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2018-10-24 16:08:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32884 states. [2018-10-24 16:08:46,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32884 to 19718. [2018-10-24 16:08:46,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19718 states. [2018-10-24 16:08:46,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19718 states to 19718 states and 21371 transitions. [2018-10-24 16:08:46,486 INFO L78 Accepts]: Start accepts. Automaton has 19718 states and 21371 transitions. Word has length 319 [2018-10-24 16:08:46,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:08:46,486 INFO L481 AbstractCegarLoop]: Abstraction has 19718 states and 21371 transitions. [2018-10-24 16:08:46,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 16:08:46,487 INFO L276 IsEmpty]: Start isEmpty. Operand 19718 states and 21371 transitions. [2018-10-24 16:08:46,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-10-24 16:08:46,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:08:46,497 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 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 16:08:46,498 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:08:46,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:08:46,498 INFO L82 PathProgramCache]: Analyzing trace with hash 494519103, now seen corresponding path program 1 times [2018-10-24 16:08:46,498 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:08:46,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:08:46,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:46,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:46,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-24 16:08:46,885 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:08:46,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:08:46,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:08:46,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:08:46,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:08:46,886 INFO L87 Difference]: Start difference. First operand 19718 states and 21371 transitions. Second operand 4 states. [2018-10-24 16:08:48,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:08:48,852 INFO L93 Difference]: Finished difference Result 39268 states and 42486 transitions. [2018-10-24 16:08:48,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:08:48,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2018-10-24 16:08:48,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:08:48,872 INFO L225 Difference]: With dead ends: 39268 [2018-10-24 16:08:48,872 INFO L226 Difference]: Without dead ends: 20472 [2018-10-24 16:08:48,883 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 16:08:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20472 states. [2018-10-24 16:08:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20472 to 16746. [2018-10-24 16:08:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16746 states. [2018-10-24 16:08:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16746 states to 16746 states and 18045 transitions. [2018-10-24 16:08:49,095 INFO L78 Accepts]: Start accepts. Automaton has 16746 states and 18045 transitions. Word has length 322 [2018-10-24 16:08:49,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:08:49,096 INFO L481 AbstractCegarLoop]: Abstraction has 16746 states and 18045 transitions. [2018-10-24 16:08:49,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:08:49,096 INFO L276 IsEmpty]: Start isEmpty. Operand 16746 states and 18045 transitions. [2018-10-24 16:08:49,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-10-24 16:08:49,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:08:49,105 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:08:49,106 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:08:49,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:08:49,106 INFO L82 PathProgramCache]: Analyzing trace with hash -537643111, now seen corresponding path program 1 times [2018-10-24 16:08:49,106 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:08:49,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:08:49,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:49,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:49,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 104 proven. 181 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-10-24 16:08:49,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:08:49,669 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 16:08:49,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:49,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:08:50,360 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 40 [2018-10-24 16:08:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 97 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:08:51,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:08:51,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2018-10-24 16:08:51,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:08:51,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:08:51,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:08:51,275 INFO L87 Difference]: Start difference. First operand 16746 states and 18045 transitions. Second operand 9 states. [2018-10-24 16:09:13,427 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2018-10-24 16:09:17,415 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2018-10-24 16:09:21,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:09:21,383 INFO L93 Difference]: Finished difference Result 41106 states and 44168 transitions. [2018-10-24 16:09:21,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-24 16:09:21,383 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 349 [2018-10-24 16:09:21,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:09:21,407 INFO L225 Difference]: With dead ends: 41106 [2018-10-24 16:09:21,407 INFO L226 Difference]: Without dead ends: 21939 [2018-10-24 16:09:21,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2018-10-24 16:09:21,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21939 states. [2018-10-24 16:09:21,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21939 to 15999. [2018-10-24 16:09:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15999 states. [2018-10-24 16:09:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15999 states to 15999 states and 17085 transitions. [2018-10-24 16:09:21,644 INFO L78 Accepts]: Start accepts. Automaton has 15999 states and 17085 transitions. Word has length 349 [2018-10-24 16:09:21,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:09:21,645 INFO L481 AbstractCegarLoop]: Abstraction has 15999 states and 17085 transitions. [2018-10-24 16:09:21,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 16:09:21,645 INFO L276 IsEmpty]: Start isEmpty. Operand 15999 states and 17085 transitions. [2018-10-24 16:09:21,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2018-10-24 16:09:21,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:09:21,657 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:09:21,657 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:09:21,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:09:21,657 INFO L82 PathProgramCache]: Analyzing trace with hash -175707184, now seen corresponding path program 1 times [2018-10-24 16:09:21,657 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:09:21,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:09:21,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:21,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:21,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:22,215 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 16:09:22,798 WARN L179 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2018-10-24 16:09:23,600 WARN L179 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2018-10-24 16:09:24,184 WARN L179 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2018-10-24 16:09:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 194 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:09:24,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:09:24,742 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 16:09:24,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:24,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:09:25,391 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 16:09:25,727 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 22 [2018-10-24 16:09:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 203 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:09:26,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:09:26,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2018-10-24 16:09:26,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 16:09:26,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 16:09:26,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:09:26,152 INFO L87 Difference]: Start difference. First operand 15999 states and 17085 transitions. Second operand 12 states. [2018-10-24 16:09:28,842 WARN L179 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2018-10-24 16:09:34,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:09:34,473 INFO L93 Difference]: Finished difference Result 29445 states and 31293 transitions. [2018-10-24 16:09:34,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 16:09:34,473 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 391 [2018-10-24 16:09:34,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:09:34,486 INFO L225 Difference]: With dead ends: 29445 [2018-10-24 16:09:34,486 INFO L226 Difference]: Without dead ends: 14925 [2018-10-24 16:09:34,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 387 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2018-10-24 16:09:34,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14925 states. [2018-10-24 16:09:34,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14925 to 11145. [2018-10-24 16:09:34,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11145 states. [2018-10-24 16:09:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11145 states to 11145 states and 11733 transitions. [2018-10-24 16:09:34,618 INFO L78 Accepts]: Start accepts. Automaton has 11145 states and 11733 transitions. Word has length 391 [2018-10-24 16:09:34,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:09:34,619 INFO L481 AbstractCegarLoop]: Abstraction has 11145 states and 11733 transitions. [2018-10-24 16:09:34,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 16:09:34,619 INFO L276 IsEmpty]: Start isEmpty. Operand 11145 states and 11733 transitions. [2018-10-24 16:09:34,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-24 16:09:34,629 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:09:34,630 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 16:09:34,630 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:09:34,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:09:34,630 INFO L82 PathProgramCache]: Analyzing trace with hash -115186598, now seen corresponding path program 1 times [2018-10-24 16:09:34,630 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:09:34,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:09:34,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:34,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:34,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 126 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:09:35,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:09:35,132 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 16:09:35,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:35,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:09:37,769 WARN L179 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 43 DAG size of output: 19 [2018-10-24 16:09:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 195 proven. 233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:09:38,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:09:38,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2018-10-24 16:09:38,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 16:09:38,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 16:09:38,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=62, Unknown=1, NotChecked=0, Total=90 [2018-10-24 16:09:38,583 INFO L87 Difference]: Start difference. First operand 11145 states and 11733 transitions. Second operand 10 states. [2018-10-24 16:09:39,737 WARN L179 SmtUtils]: Spent 680.00 ms on a formula simplification that was a NOOP. DAG size: 20 Received shutdown request... [2018-10-24 16:12:01,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 16:12:01,394 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:12:01,401 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:12:01,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:12:01 BoogieIcfgContainer [2018-10-24 16:12:01,401 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:12:01,402 INFO L168 Benchmark]: Toolchain (without parser) took 253611.32 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 487.2 MB. Max. memory is 7.1 GB. [2018-10-24 16:12:01,403 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:12:01,404 INFO L168 Benchmark]: CACSL2BoogieTranslator took 970.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 66.1 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. [2018-10-24 16:12:01,405 INFO L168 Benchmark]: Boogie Procedure Inliner took 294.85 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 753.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -847.9 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2018-10-24 16:12:01,405 INFO L168 Benchmark]: Boogie Preprocessor took 144.33 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:12:01,406 INFO L168 Benchmark]: RCFGBuilder took 5059.02 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 200.0 MB). Peak memory consumption was 200.0 MB. Max. memory is 7.1 GB. [2018-10-24 16:12:01,407 INFO L168 Benchmark]: TraceAbstraction took 247138.01 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.2 GB). Free memory was 2.0 GB in the beginning and 2.9 GB in the end (delta: -916.9 MB). Peak memory consumption was 315.2 MB. Max. memory is 7.1 GB. [2018-10-24 16:12:01,411 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 970.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 66.1 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 294.85 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 753.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -847.9 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 144.33 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 5059.02 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 200.0 MB). Peak memory consumption was 200.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 247138.01 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.2 GB). Free memory was 2.0 GB in the beginning and 2.9 GB in the end (delta: -916.9 MB). Peak memory consumption was 315.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 114]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 114). Cancelled while BasicCegarLoop was constructing difference of abstraction (11145states) and FLOYD_HOARE automaton (currently 20 states, 10 states before enhancement),while ReachableStatesComputation was computing reachable states (13654 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 284 locations, 1 error locations. TIMEOUT Result, 247.0s OverallTime, 13 OverallIterations, 4 TraceHistogramMax, 227.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2263 SDtfs, 15177 SDslu, 2165 SDs, 0 SdLazy, 39611 SolverSat, 5676 SolverUnsat, 176 SolverUnknown, 0 SolverNotchecked, 210.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1869 GetRequests, 1753 SyntacticMatches, 5 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 14.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23643occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.4s AutomataMinimizationTime, 12 MinimizatonAttempts, 34512 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 13.9s InterpolantComputationTime, 5031 NumberOfCodeBlocks, 5031 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 5013 ConstructedInterpolants, 660 QuantifiedInterpolants, 15007799 SizeOfPredicates, 6 NumberOfNonLiveVariables, 2313 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 18 InterpolantComputations, 9 PerfectInterpolantSequences, 2340/4099 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown