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/Problem14_label04_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 21:32:24,340 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:32:24,342 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:32:24,355 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:32:24,355 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:32:24,356 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:32:24,357 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:32:24,359 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:32:24,361 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:32:24,362 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:32:24,363 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:32:24,363 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:32:24,364 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:32:24,365 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:32:24,366 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:32:24,367 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:32:24,368 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:32:24,370 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:32:24,372 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:32:24,374 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:32:24,375 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:32:24,376 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:32:24,379 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-26 21:32:24,388 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-26 21:32:24,404 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:32:24,404 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:32:24,405 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:32:24,405 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 21:32:24,406 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 21:32:24,406 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 21:32:24,406 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 21:32:24,407 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:32:24,407 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 21:32:24,407 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:32:24,407 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:32:24,407 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:32:24,408 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:32:24,408 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:32:24,408 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:32:24,408 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:32:24,408 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:32:24,409 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:32:24,409 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:32:24,409 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:32:24,409 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:32:24,409 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:32:24,410 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:32:24,410 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 21:32:24,410 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:32:24,410 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 21:32:24,410 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 21:32:24,411 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 21:32:24,465 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:32:24,481 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:32:24,485 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:32:24,487 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:32:24,487 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:32:24,488 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label04_true-unreach-call_false-termination.c [2018-10-26 21:32:24,551 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ef8571869/6de12b96d97c4c379b4230c05cdb06d2/FLAGa96f64161 [2018-10-26 21:32:25,120 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:32:25,121 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label04_true-unreach-call_false-termination.c [2018-10-26 21:32:25,135 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ef8571869/6de12b96d97c4c379b4230c05cdb06d2/FLAGa96f64161 [2018-10-26 21:32:25,157 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ef8571869/6de12b96d97c4c379b4230c05cdb06d2 [2018-10-26 21:32:25,169 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:32:25,171 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 21:32:25,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:32:25,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:32:25,179 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:32:25,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:32:25" (1/1) ... [2018-10-26 21:32:25,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28a8effd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:25, skipping insertion in model container [2018-10-26 21:32:25,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:32:25" (1/1) ... [2018-10-26 21:32:25,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:32:25,283 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:32:25,746 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:32:25,751 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:32:25,911 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:32:25,928 INFO L193 MainTranslator]: Completed translation [2018-10-26 21:32:25,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:25 WrapperNode [2018-10-26 21:32:25,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 21:32:25,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 21:32:25,930 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 21:32:25,930 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 21:32:25,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:25" (1/1) ... [2018-10-26 21:32:25,978 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:25" (1/1) ... [2018-10-26 21:32:26,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 21:32:26,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 21:32:26,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 21:32:26,071 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 21:32:26,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:25" (1/1) ... [2018-10-26 21:32:26,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:25" (1/1) ... [2018-10-26 21:32:26,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:25" (1/1) ... [2018-10-26 21:32:26,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:25" (1/1) ... [2018-10-26 21:32:26,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:25" (1/1) ... [2018-10-26 21:32:26,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:25" (1/1) ... [2018-10-26 21:32:26,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:25" (1/1) ... [2018-10-26 21:32:26,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 21:32:26,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 21:32:26,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 21:32:26,309 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 21:32:26,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:32:26,385 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-26 21:32:26,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 21:32:26,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 21:32:30,068 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 21:32:30,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:32:30 BoogieIcfgContainer [2018-10-26 21:32:30,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 21:32:30,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 21:32:30,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 21:32:30,076 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 21:32:30,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:32:25" (1/3) ... [2018-10-26 21:32:30,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15761198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:32:30, skipping insertion in model container [2018-10-26 21:32:30,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:25" (2/3) ... [2018-10-26 21:32:30,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15761198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:32:30, skipping insertion in model container [2018-10-26 21:32:30,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:32:30" (3/3) ... [2018-10-26 21:32:30,080 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label04_true-unreach-call_false-termination.c [2018-10-26 21:32:30,090 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 21:32:30,099 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 21:32:30,117 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 21:32:30,154 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 21:32:30,155 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 21:32:30,156 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 21:32:30,156 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 21:32:30,156 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 21:32:30,157 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 21:32:30,157 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 21:32:30,157 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 21:32:30,157 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 21:32:30,182 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states. [2018-10-26 21:32:30,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-26 21:32:30,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:32:30,193 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:32:30,196 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:32:30,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:32:30,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1884671582, now seen corresponding path program 1 times [2018-10-26 21:32:30,205 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:32:30,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:32:30,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:32:30,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:32:30,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:32:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:32:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:32:30,754 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:32:30,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:32:30,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:32:30,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:32:30,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:32:30,782 INFO L87 Difference]: Start difference. First operand 246 states. Second operand 4 states. [2018-10-26 21:32:33,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:32:33,839 INFO L93 Difference]: Finished difference Result 854 states and 1562 transitions. [2018-10-26 21:32:33,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:32:33,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2018-10-26 21:32:33,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:32:33,867 INFO L225 Difference]: With dead ends: 854 [2018-10-26 21:32:33,868 INFO L226 Difference]: Without dead ends: 601 [2018-10-26 21:32:33,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:32:33,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2018-10-26 21:32:33,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2018-10-26 21:32:33,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2018-10-26 21:32:33,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 997 transitions. [2018-10-26 21:32:33,968 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 997 transitions. Word has length 53 [2018-10-26 21:32:33,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:32:33,969 INFO L481 AbstractCegarLoop]: Abstraction has 601 states and 997 transitions. [2018-10-26 21:32:33,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:32:33,969 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 997 transitions. [2018-10-26 21:32:33,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-26 21:32:33,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:32:33,976 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:32:33,976 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:32:33,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:32:33,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1961428045, now seen corresponding path program 1 times [2018-10-26 21:32:33,977 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:32:33,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:32:33,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:32:33,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:32:33,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:32:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:32:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:32:34,282 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:32:34,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:32:34,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:32:34,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:32:34,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:32:34,287 INFO L87 Difference]: Start difference. First operand 601 states and 997 transitions. Second operand 4 states. [2018-10-26 21:32:37,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:32:37,242 INFO L93 Difference]: Finished difference Result 2274 states and 3860 transitions. [2018-10-26 21:32:37,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:32:37,243 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2018-10-26 21:32:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:32:37,254 INFO L225 Difference]: With dead ends: 2274 [2018-10-26 21:32:37,254 INFO L226 Difference]: Without dead ends: 1675 [2018-10-26 21:32:37,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:32:37,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2018-10-26 21:32:37,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1675. [2018-10-26 21:32:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1675 states. [2018-10-26 21:32:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 2493 transitions. [2018-10-26 21:32:37,347 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 2493 transitions. Word has length 120 [2018-10-26 21:32:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:32:37,348 INFO L481 AbstractCegarLoop]: Abstraction has 1675 states and 2493 transitions. [2018-10-26 21:32:37,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:32:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 2493 transitions. [2018-10-26 21:32:37,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-26 21:32:37,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:32:37,364 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:32:37,365 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:32:37,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:32:37,366 INFO L82 PathProgramCache]: Analyzing trace with hash -910105896, now seen corresponding path program 1 times [2018-10-26 21:32:37,366 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:32:37,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:32:37,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:32:37,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:32:37,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:32:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:32:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:32:37,713 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:32:37,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:32:37,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:32:37,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:32:37,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:32:37,716 INFO L87 Difference]: Start difference. First operand 1675 states and 2493 transitions. Second operand 4 states. [2018-10-26 21:32:40,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:32:40,602 INFO L93 Difference]: Finished difference Result 5512 states and 8130 transitions. [2018-10-26 21:32:40,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:32:40,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2018-10-26 21:32:40,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:32:40,626 INFO L225 Difference]: With dead ends: 5512 [2018-10-26 21:32:40,626 INFO L226 Difference]: Without dead ends: 3839 [2018-10-26 21:32:40,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:32:40,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3839 states. [2018-10-26 21:32:40,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3839 to 3839. [2018-10-26 21:32:40,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3839 states. [2018-10-26 21:32:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3839 states to 3839 states and 5093 transitions. [2018-10-26 21:32:40,705 INFO L78 Accepts]: Start accepts. Automaton has 3839 states and 5093 transitions. Word has length 122 [2018-10-26 21:32:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:32:40,706 INFO L481 AbstractCegarLoop]: Abstraction has 3839 states and 5093 transitions. [2018-10-26 21:32:40,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:32:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 3839 states and 5093 transitions. [2018-10-26 21:32:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-26 21:32:40,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:32:40,711 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:32:40,711 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:32:40,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:32:40,712 INFO L82 PathProgramCache]: Analyzing trace with hash 467881856, now seen corresponding path program 1 times [2018-10-26 21:32:40,712 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:32:40,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:32:40,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:32:40,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:32:40,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:32:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:32:41,148 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-10-26 21:32:41,348 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-26 21:32:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 155 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-26 21:32:41,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:32:41,434 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:32:41,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:32:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:32:41,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:32:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-26 21:32:41,729 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:32:41,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-26 21:32:41,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 21:32:41,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 21:32:41,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:32:41,734 INFO L87 Difference]: Start difference. First operand 3839 states and 5093 transitions. Second operand 6 states. [2018-10-26 21:32:43,787 WARN L179 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-26 21:32:51,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:32:51,136 INFO L93 Difference]: Finished difference Result 12524 states and 16345 transitions. [2018-10-26 21:32:51,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 21:32:51,146 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 226 [2018-10-26 21:32:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:32:51,184 INFO L225 Difference]: With dead ends: 12524 [2018-10-26 21:32:51,184 INFO L226 Difference]: Without dead ends: 8326 [2018-10-26 21:32:51,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-26 21:32:51,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8326 states. [2018-10-26 21:32:51,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8326 to 5612. [2018-10-26 21:32:51,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5612 states. [2018-10-26 21:32:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5612 states to 5612 states and 6379 transitions. [2018-10-26 21:32:51,323 INFO L78 Accepts]: Start accepts. Automaton has 5612 states and 6379 transitions. Word has length 226 [2018-10-26 21:32:51,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:32:51,324 INFO L481 AbstractCegarLoop]: Abstraction has 5612 states and 6379 transitions. [2018-10-26 21:32:51,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 21:32:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand 5612 states and 6379 transitions. [2018-10-26 21:32:51,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-10-26 21:32:51,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:32:51,335 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:32:51,336 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:32:51,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:32:51,336 INFO L82 PathProgramCache]: Analyzing trace with hash 691767955, now seen corresponding path program 1 times [2018-10-26 21:32:51,336 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:32:51,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:32:51,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:32:51,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:32:51,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:32:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:32:51,876 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2018-10-26 21:32:52,203 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 300 proven. 46 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-10-26 21:32:52,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:32:52,204 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:32:52,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:32:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:32:52,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:32:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 323 proven. 23 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-10-26 21:32:52,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:32:52,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2018-10-26 21:32:52,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 21:32:52,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 21:32:52,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-26 21:32:52,703 INFO L87 Difference]: Start difference. First operand 5612 states and 6379 transitions. Second operand 9 states. [2018-10-26 21:32:56,889 WARN L179 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-10-26 21:33:00,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:33:00,439 INFO L93 Difference]: Finished difference Result 11302 states and 12838 transitions. [2018-10-26 21:33:00,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 21:33:00,440 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2018-10-26 21:33:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:33:00,461 INFO L225 Difference]: With dead ends: 11302 [2018-10-26 21:33:00,461 INFO L226 Difference]: Without dead ends: 5871 [2018-10-26 21:33:00,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 358 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:33:00,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5871 states. [2018-10-26 21:33:00,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5871 to 5612. [2018-10-26 21:33:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5612 states. [2018-10-26 21:33:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5612 states to 5612 states and 6376 transitions. [2018-10-26 21:33:00,557 INFO L78 Accepts]: Start accepts. Automaton has 5612 states and 6376 transitions. Word has length 360 [2018-10-26 21:33:00,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:33:00,557 INFO L481 AbstractCegarLoop]: Abstraction has 5612 states and 6376 transitions. [2018-10-26 21:33:00,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 21:33:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5612 states and 6376 transitions. [2018-10-26 21:33:00,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2018-10-26 21:33:00,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:33:00,574 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-26 21:33:00,574 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:33:00,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:33:00,574 INFO L82 PathProgramCache]: Analyzing trace with hash 999632577, now seen corresponding path program 1 times [2018-10-26 21:33:00,575 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:33:00,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:33:00,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:33:00,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:33:00,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:33:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:33:01,150 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 21:33:01,396 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-26 21:33:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 808 proven. 201 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2018-10-26 21:33:02,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:33:02,251 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:33:02,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:33:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:33:02,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:33:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 715 proven. 93 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2018-10-26 21:33:02,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:33:02,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 9 [2018-10-26 21:33:02,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 21:33:02,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 21:33:02,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-10-26 21:33:02,980 INFO L87 Difference]: Start difference. First operand 5612 states and 6376 transitions. Second operand 10 states. [2018-10-26 21:33:06,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:33:06,883 INFO L93 Difference]: Finished difference Result 12014 states and 13756 transitions. [2018-10-26 21:33:06,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 21:33:06,883 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 580 [2018-10-26 21:33:06,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:33:06,904 INFO L225 Difference]: With dead ends: 12014 [2018-10-26 21:33:06,904 INFO L226 Difference]: Without dead ends: 6583 [2018-10-26 21:33:06,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-10-26 21:33:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2018-10-26 21:33:06,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6507. [2018-10-26 21:33:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6507 states. [2018-10-26 21:33:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6507 states to 6507 states and 7414 transitions. [2018-10-26 21:33:07,006 INFO L78 Accepts]: Start accepts. Automaton has 6507 states and 7414 transitions. Word has length 580 [2018-10-26 21:33:07,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:33:07,007 INFO L481 AbstractCegarLoop]: Abstraction has 6507 states and 7414 transitions. [2018-10-26 21:33:07,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 21:33:07,007 INFO L276 IsEmpty]: Start isEmpty. Operand 6507 states and 7414 transitions. [2018-10-26 21:33:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2018-10-26 21:33:07,024 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:33:07,024 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:33:07,025 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:33:07,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:33:07,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1310166270, now seen corresponding path program 1 times [2018-10-26 21:33:07,026 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:33:07,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:33:07,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:33:07,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:33:07,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:33:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:33:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 533 proven. 0 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2018-10-26 21:33:07,502 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:33:07,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:33:07,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:33:07,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:33:07,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:33:07,504 INFO L87 Difference]: Start difference. First operand 6507 states and 7414 transitions. Second operand 4 states. [2018-10-26 21:33:09,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:33:09,037 INFO L93 Difference]: Finished difference Result 16055 states and 18465 transitions. [2018-10-26 21:33:09,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:33:09,038 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 606 [2018-10-26 21:33:09,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:33:09,069 INFO L225 Difference]: With dead ends: 16055 [2018-10-26 21:33:09,069 INFO L226 Difference]: Without dead ends: 9729 [2018-10-26 21:33:09,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:33:09,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9729 states. [2018-10-26 21:33:09,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9729 to 9729. [2018-10-26 21:33:09,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9729 states. [2018-10-26 21:33:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9729 states to 9729 states and 10858 transitions. [2018-10-26 21:33:09,275 INFO L78 Accepts]: Start accepts. Automaton has 9729 states and 10858 transitions. Word has length 606 [2018-10-26 21:33:09,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:33:09,276 INFO L481 AbstractCegarLoop]: Abstraction has 9729 states and 10858 transitions. [2018-10-26 21:33:09,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:33:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 9729 states and 10858 transitions. [2018-10-26 21:33:09,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2018-10-26 21:33:09,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:33:09,289 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:33:09,289 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:33:09,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:33:09,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1589739572, now seen corresponding path program 1 times [2018-10-26 21:33:09,290 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:33:09,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:33:09,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:33:09,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:33:09,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:33:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:33:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 903 proven. 111 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-10-26 21:33:09,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:33:09,999 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:33:10,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:33:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:33:10,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:33:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 903 proven. 111 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-10-26 21:33:10,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:33:10,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2018-10-26 21:33:10,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:33:10,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:33:10,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:33:10,485 INFO L87 Difference]: Start difference. First operand 9729 states and 10858 transitions. Second operand 5 states. [2018-10-26 21:33:12,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:33:12,814 INFO L93 Difference]: Finished difference Result 23409 states and 26412 transitions. [2018-10-26 21:33:12,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:33:12,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 647 [2018-10-26 21:33:12,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:33:12,846 INFO L225 Difference]: With dead ends: 23409 [2018-10-26 21:33:12,846 INFO L226 Difference]: Without dead ends: 13861 [2018-10-26 21:33:12,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 649 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:33:12,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13861 states. [2018-10-26 21:33:13,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13861 to 12056. [2018-10-26 21:33:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12056 states. [2018-10-26 21:33:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12056 states to 12056 states and 13460 transitions. [2018-10-26 21:33:13,026 INFO L78 Accepts]: Start accepts. Automaton has 12056 states and 13460 transitions. Word has length 647 [2018-10-26 21:33:13,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:33:13,027 INFO L481 AbstractCegarLoop]: Abstraction has 12056 states and 13460 transitions. [2018-10-26 21:33:13,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:33:13,028 INFO L276 IsEmpty]: Start isEmpty. Operand 12056 states and 13460 transitions. [2018-10-26 21:33:13,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2018-10-26 21:33:13,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:33:13,042 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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] [2018-10-26 21:33:13,042 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:33:13,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:33:13,043 INFO L82 PathProgramCache]: Analyzing trace with hash -996298072, now seen corresponding path program 1 times [2018-10-26 21:33:13,043 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:33:13,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:33:13,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:33:13,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:33:13,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:33:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:33:13,656 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-26 21:33:13,939 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-10-26 21:33:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1608 backedges. 1240 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2018-10-26 21:33:14,429 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:33:14,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 21:33:14,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:33:14,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:33:14,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:33:14,430 INFO L87 Difference]: Start difference. First operand 12056 states and 13460 transitions. Second operand 5 states. [2018-10-26 21:33:16,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:33:16,192 INFO L93 Difference]: Finished difference Result 23931 states and 26738 transitions. [2018-10-26 21:33:16,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:33:16,192 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 658 [2018-10-26 21:33:16,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:33:16,216 INFO L225 Difference]: With dead ends: 23931 [2018-10-26 21:33:16,216 INFO L226 Difference]: Without dead ends: 12056 [2018-10-26 21:33:16,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:33:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12056 states. [2018-10-26 21:33:16,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12056 to 12056. [2018-10-26 21:33:16,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12056 states. [2018-10-26 21:33:16,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12056 states to 12056 states and 13300 transitions. [2018-10-26 21:33:16,370 INFO L78 Accepts]: Start accepts. Automaton has 12056 states and 13300 transitions. Word has length 658 [2018-10-26 21:33:16,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:33:16,371 INFO L481 AbstractCegarLoop]: Abstraction has 12056 states and 13300 transitions. [2018-10-26 21:33:16,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:33:16,371 INFO L276 IsEmpty]: Start isEmpty. Operand 12056 states and 13300 transitions. [2018-10-26 21:33:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 777 [2018-10-26 21:33:16,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:33:16,382 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:33:16,382 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:33:16,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:33:16,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1195887345, now seen corresponding path program 1 times [2018-10-26 21:33:16,383 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:33:16,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:33:16,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:33:16,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:33:16,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:33:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:33:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 741 proven. 336 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2018-10-26 21:33:18,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:33:18,219 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:33:18,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:33:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:33:18,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:33:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 654 proven. 0 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2018-10-26 21:33:19,095 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:33:19,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2018-10-26 21:33:19,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 21:33:19,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 21:33:19,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:33:19,097 INFO L87 Difference]: Start difference. First operand 12056 states and 13300 transitions. Second operand 12 states. [2018-10-26 21:33:25,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:33:25,454 INFO L93 Difference]: Finished difference Result 24067 states and 26592 transitions. [2018-10-26 21:33:25,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-26 21:33:25,454 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 776 [2018-10-26 21:33:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:33:25,471 INFO L225 Difference]: With dead ends: 24067 [2018-10-26 21:33:25,471 INFO L226 Difference]: Without dead ends: 11648 [2018-10-26 21:33:25,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 802 GetRequests, 775 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2018-10-26 21:33:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11648 states. [2018-10-26 21:33:25,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11648 to 11337. [2018-10-26 21:33:25,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11337 states. [2018-10-26 21:33:25,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11337 states to 11337 states and 12097 transitions. [2018-10-26 21:33:25,611 INFO L78 Accepts]: Start accepts. Automaton has 11337 states and 12097 transitions. Word has length 776 [2018-10-26 21:33:25,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:33:25,612 INFO L481 AbstractCegarLoop]: Abstraction has 11337 states and 12097 transitions. [2018-10-26 21:33:25,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 21:33:25,612 INFO L276 IsEmpty]: Start isEmpty. Operand 11337 states and 12097 transitions. [2018-10-26 21:33:25,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2018-10-26 21:33:25,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:33:25,621 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:33:25,622 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:33:25,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:33:25,622 INFO L82 PathProgramCache]: Analyzing trace with hash 960046082, now seen corresponding path program 1 times [2018-10-26 21:33:25,622 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:33:25,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:33:25,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:33:25,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:33:25,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:33:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:33:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2259 backedges. 941 proven. 0 refuted. 0 times theorem prover too weak. 1318 trivial. 0 not checked. [2018-10-26 21:33:26,324 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:33:26,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 21:33:26,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:33:26,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:33:26,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:33:26,325 INFO L87 Difference]: Start difference. First operand 11337 states and 12097 transitions. Second operand 5 states. [2018-10-26 21:33:27,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:33:27,838 INFO L93 Difference]: Finished difference Result 25193 states and 26920 transitions. [2018-10-26 21:33:27,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:33:27,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 816 [2018-10-26 21:33:27,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:33:27,859 INFO L225 Difference]: With dead ends: 25193 [2018-10-26 21:33:27,860 INFO L226 Difference]: Without dead ends: 13679 [2018-10-26 21:33:27,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:33:27,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13679 states. [2018-10-26 21:33:28,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13679 to 12418. [2018-10-26 21:33:28,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12418 states. [2018-10-26 21:33:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12418 states to 12418 states and 13267 transitions. [2018-10-26 21:33:28,020 INFO L78 Accepts]: Start accepts. Automaton has 12418 states and 13267 transitions. Word has length 816 [2018-10-26 21:33:28,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:33:28,021 INFO L481 AbstractCegarLoop]: Abstraction has 12418 states and 13267 transitions. [2018-10-26 21:33:28,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:33:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 12418 states and 13267 transitions. [2018-10-26 21:33:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 862 [2018-10-26 21:33:28,032 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:33:28,032 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-10-26 21:33:28,033 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:33:28,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:33:28,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1362996267, now seen corresponding path program 1 times [2018-10-26 21:33:28,033 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:33:28,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:33:28,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:33:28,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:33:28,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:33:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:33:28,746 WARN L179 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-26 21:33:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2292 backedges. 1287 proven. 0 refuted. 0 times theorem prover too weak. 1005 trivial. 0 not checked. [2018-10-26 21:33:29,221 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:33:29,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:33:29,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:33:29,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:33:29,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:33:29,222 INFO L87 Difference]: Start difference. First operand 12418 states and 13267 transitions. Second operand 4 states. [2018-10-26 21:33:30,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:33:30,645 INFO L93 Difference]: Finished difference Result 24112 states and 25776 transitions. [2018-10-26 21:33:30,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:33:30,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 861 [2018-10-26 21:33:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:33:30,658 INFO L225 Difference]: With dead ends: 24112 [2018-10-26 21:33:30,658 INFO L226 Difference]: Without dead ends: 11875 [2018-10-26 21:33:30,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:33:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11875 states. [2018-10-26 21:33:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11875 to 11875. [2018-10-26 21:33:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11875 states. [2018-10-26 21:33:30,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11875 states to 11875 states and 12547 transitions. [2018-10-26 21:33:30,782 INFO L78 Accepts]: Start accepts. Automaton has 11875 states and 12547 transitions. Word has length 861 [2018-10-26 21:33:30,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:33:30,782 INFO L481 AbstractCegarLoop]: Abstraction has 11875 states and 12547 transitions. [2018-10-26 21:33:30,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:33:30,782 INFO L276 IsEmpty]: Start isEmpty. Operand 11875 states and 12547 transitions. [2018-10-26 21:33:30,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 936 [2018-10-26 21:33:30,794 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:33:30,794 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:33:30,795 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:33:30,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:33:30,795 INFO L82 PathProgramCache]: Analyzing trace with hash -729599854, now seen corresponding path program 1 times [2018-10-26 21:33:30,795 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:33:30,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:33:30,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:33:30,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:33:30,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:33:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:33:31,571 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-26 21:33:31,960 WARN L179 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2018-10-26 21:33:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2541 backedges. 858 proven. 822 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-26 21:33:33,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:33:33,945 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:33:33,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:33:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:33:34,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:33:52,004 WARN L179 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 167 DAG size of output: 25 [2018-10-26 21:34:00,479 WARN L179 SmtUtils]: Spent 8.19 s on a formula simplification. DAG size of input: 236 DAG size of output: 63 [2018-10-26 21:34:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2541 backedges. 634 proven. 782 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2018-10-26 21:34:03,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:34:03,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2018-10-26 21:34:03,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 21:34:03,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 21:34:03,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=177, Unknown=8, NotChecked=0, Total=240 [2018-10-26 21:34:03,386 INFO L87 Difference]: Start difference. First operand 11875 states and 12547 transitions. Second operand 16 states. [2018-10-26 21:34:05,987 WARN L179 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2018-10-26 21:34:07,457 WARN L179 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2018-10-26 21:34:09,545 WARN L179 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2018-10-26 21:36:29,852 WARN L179 SmtUtils]: Spent 10.28 s on a formula simplification. DAG size of input: 68 DAG size of output: 66 Received shutdown request... [2018-10-26 21:36:41,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 21:36:41,040 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 21:36:41,046 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 21:36:41,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 09:36:41 BoogieIcfgContainer [2018-10-26 21:36:41,047 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 21:36:41,047 INFO L168 Benchmark]: Toolchain (without parser) took 255877.98 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 4.0 GB in the end (delta: -2.6 GB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-10-26 21:36:41,049 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 21:36:41,049 INFO L168 Benchmark]: CACSL2BoogieTranslator took 756.58 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: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. [2018-10-26 21:36:41,051 INFO L168 Benchmark]: Boogie Procedure Inliner took 140.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-26 21:36:41,052 INFO L168 Benchmark]: Boogie Preprocessor took 237.88 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 749.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -840.4 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2018-10-26 21:36:41,053 INFO L168 Benchmark]: RCFGBuilder took 3760.65 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 120.5 MB). Peak memory consumption was 120.5 MB. Max. memory is 7.1 GB. [2018-10-26 21:36:41,053 INFO L168 Benchmark]: TraceAbstraction took 250974.40 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 4.0 GB in the end (delta: -1.9 GB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-10-26 21:36:41,061 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 756.58 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: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 140.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 237.88 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 749.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -840.4 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3760.65 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 120.5 MB). Peak memory consumption was 120.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 250974.40 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 4.0 GB in the end (delta: -1.9 GB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 160]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 160). Cancelled while BasicCegarLoop was constructing difference of abstraction (11875states) and FLOYD_HOARE automaton (currently 12 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (2353 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 246 locations, 1 error locations. TIMEOUT Result, 250.9s OverallTime, 13 OverallIterations, 8 TraceHistogramMax, 202.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1996 SDtfs, 10601 SDslu, 2009 SDs, 0 SdLazy, 23570 SolverSat, 3092 SolverUnsat, 186 SolverUnknown, 0 SolverNotchecked, 177.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3636 GetRequests, 3532 SyntacticMatches, 13 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 48.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12418occurred in iteration=11, 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: 1.4s AutomataMinimizationTime, 12 MinimizatonAttempts, 6426 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 38.8s InterpolantComputationTime, 10284 NumberOfCodeBlocks, 10284 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 10265 ConstructedInterpolants, 121 QuantifiedInterpolants, 42980942 SizeOfPredicates, 13 NumberOfNonLiveVariables, 4378 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 19 InterpolantComputations, 9 PerfectInterpolantSequences, 19715/22245 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown