java -Xss4m -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call3_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-71425fa [2018-07-21 22:30:22,990 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-21 22:30:22,992 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-21 22:30:23,007 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-21 22:30:23,007 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-21 22:30:23,010 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-21 22:30:23,011 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-21 22:30:23,013 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-21 22:30:23,015 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-21 22:30:23,015 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-21 22:30:23,017 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-21 22:30:23,017 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-21 22:30:23,018 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-21 22:30:23,019 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-21 22:30:23,022 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-21 22:30:23,023 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-21 22:30:23,023 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-21 22:30:23,026 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-21 22:30:23,028 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-21 22:30:23,029 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-21 22:30:23,030 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-21 22:30:23,031 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-21 22:30:23,034 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-21 22:30:23,041 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-07-21 22:30:23,055 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-21 22:30:23,056 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-21 22:30:23,056 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-21 22:30:23,056 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-07-21 22:30:23,057 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-07-21 22:30:23,057 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-07-21 22:30:23,057 INFO L133 SettingsManager]: * Use SBE=true [2018-07-21 22:30:23,058 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-21 22:30:23,058 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-21 22:30:23,058 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-21 22:30:23,058 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-21 22:30:23,058 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-21 22:30:23,058 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-21 22:30:23,059 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-21 22:30:23,059 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-21 22:30:23,059 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-21 22:30:23,059 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-21 22:30:23,059 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-21 22:30:23,060 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-21 22:30:23,060 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-21 22:30:23,060 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-21 22:30:23,060 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-07-21 22:30:23,060 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-21 22:30:23,061 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-21 22:30:23,061 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-07-21 22:30:23,061 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-21 22:30:23,061 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-21 22:30:23,061 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-21 22:30:23,061 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-21 22:30:23,103 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-21 22:30:23,122 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-21 22:30:23,127 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-21 22:30:23,128 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-21 22:30:23,128 INFO L276 PluginConnector]: CDTParser initialized [2018-07-21 22:30:23,129 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call3_true-termination.i [2018-07-21 22:30:23,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/b9f456e86/3358d54c33fc4cc7baeca3bd26e5a4f9/FLAGf24476cff [2018-07-21 22:30:23,622 INFO L276 CDTParser]: Found 1 translation units. [2018-07-21 22:30:23,623 INFO L158 CDTParser]: Scanning /storage/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call3_true-termination.i [2018-07-21 22:30:23,629 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/b9f456e86/3358d54c33fc4cc7baeca3bd26e5a4f9/FLAGf24476cff [2018-07-21 22:30:23,645 INFO L332 CDTParser]: Successfully deleted /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/b9f456e86/3358d54c33fc4cc7baeca3bd26e5a4f9 [2018-07-21 22:30:23,657 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-21 22:30:23,661 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-21 22:30:23,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-21 22:30:23,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-21 22:30:23,669 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-21 22:30:23,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:30:23" (1/1) ... [2018-07-21 22:30:23,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c5fd596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:23, skipping insertion in model container [2018-07-21 22:30:23,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:30:23" (1/1) ... [2018-07-21 22:30:23,860 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-21 22:30:23,903 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-21 22:30:23,915 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-21 22:30:23,920 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-21 22:30:23,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:23 WrapperNode [2018-07-21 22:30:23,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-21 22:30:23,934 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-21 22:30:23,934 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-21 22:30:23,935 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-21 22:30:23,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:23" (1/1) ... [2018-07-21 22:30:23,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:23" (1/1) ... [2018-07-21 22:30:23,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-21 22:30:23,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-21 22:30:23,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-21 22:30:23,964 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-21 22:30:23,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:23" (1/1) ... [2018-07-21 22:30:23,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:23" (1/1) ... [2018-07-21 22:30:23,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:23" (1/1) ... [2018-07-21 22:30:23,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:23" (1/1) ... [2018-07-21 22:30:23,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:23" (1/1) ... [2018-07-21 22:30:23,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:23" (1/1) ... [2018-07-21 22:30:23,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:23" (1/1) ... [2018-07-21 22:30:23,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-21 22:30:23,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-21 22:30:23,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-21 22:30:23,982 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-21 22:30:23,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:23" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-21 22:30:24,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-21 22:30:24,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-21 22:30:24,317 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-21 22:30:24,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:30:24 BoogieIcfgContainer [2018-07-21 22:30:24,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-21 22:30:24,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-21 22:30:24,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-21 22:30:24,330 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-21 22:30:24,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:30:23" (1/3) ... [2018-07-21 22:30:24,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4f75d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:30:24, skipping insertion in model container [2018-07-21 22:30:24,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:30:23" (2/3) ... [2018-07-21 22:30:24,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4f75d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:30:24, skipping insertion in model container [2018-07-21 22:30:24,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:30:24" (3/3) ... [2018-07-21 22:30:24,333 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_true-unreach-call3_true-termination.i [2018-07-21 22:30:24,342 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-21 22:30:24,350 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-21 22:30:24,398 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-21 22:30:24,398 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-21 22:30:24,399 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-21 22:30:24,399 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-21 22:30:24,399 INFO L376 AbstractCegarLoop]: Backedges is TWOTRACK [2018-07-21 22:30:24,399 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-21 22:30:24,399 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-21 22:30:24,399 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-21 22:30:24,400 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-21 22:30:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-07-21 22:30:24,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-21 22:30:24,440 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:30:24,441 INFO L358 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:30:24,441 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:30:24,453 INFO L82 PathProgramCache]: Analyzing trace with hash 383758092, now seen corresponding path program 1 times [2018-07-21 22:30:24,455 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:30:24,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:30:24,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:24,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:30:24,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:24,554 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 22:30:24,554 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-21 22:30:24,557 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-21 22:30:24,566 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-21 22:30:24,567 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-21 22:30:24,569 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2018-07-21 22:30:24,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:30:24,583 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-07-21 22:30:24,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-21 22:30:24,584 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-07-21 22:30:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:30:24,594 INFO L225 Difference]: With dead ends: 26 [2018-07-21 22:30:24,594 INFO L226 Difference]: Without dead ends: 12 [2018-07-21 22:30:24,597 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-21 22:30:24,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-21 22:30:24,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-07-21 22:30:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-07-21 22:30:24,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-07-21 22:30:24,641 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2018-07-21 22:30:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:30:24,641 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-07-21 22:30:24,641 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-21 22:30:24,642 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-07-21 22:30:24,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-07-21 22:30:24,642 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:30:24,642 INFO L358 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:30:24,643 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:30:24,643 INFO L82 PathProgramCache]: Analyzing trace with hash 325883248, now seen corresponding path program 1 times [2018-07-21 22:30:24,643 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:30:24,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:30:24,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:24,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:30:24,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:24,749 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 22:30:24,749 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-21 22:30:24,752 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-21 22:30:24,752 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-21 22:30:24,752 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-21 22:30:24,753 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2018-07-21 22:30:24,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:30:24,819 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-07-21 22:30:24,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-21 22:30:24,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-07-21 22:30:24,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:30:24,821 INFO L225 Difference]: With dead ends: 29 [2018-07-21 22:30:24,821 INFO L226 Difference]: Without dead ends: 21 [2018-07-21 22:30:24,822 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-21 22:30:24,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-21 22:30:24,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2018-07-21 22:30:24,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-21 22:30:24,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-07-21 22:30:24,826 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2018-07-21 22:30:24,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:30:24,826 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-07-21 22:30:24,826 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-21 22:30:24,826 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-07-21 22:30:24,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-21 22:30:24,828 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:30:24,828 INFO L358 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:30:24,828 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:30:24,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1748105558, now seen corresponding path program 1 times [2018-07-21 22:30:24,829 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:30:24,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:30:24,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:24,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:30:24,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:24,939 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:30:24,939 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-07-21 22:30:24,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:30:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:24,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:30:25,058 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-07-21 22:30:25,060 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-07-21 22:30:25,069 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-21 22:30:25,069 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-07-21 22:30:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:25,215 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:30:25,216 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 8 [2018-07-21 22:30:25,216 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-21 22:30:25,216 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-21 22:30:25,216 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-07-21 22:30:25,217 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2018-07-21 22:30:25,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:30:25,635 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-07-21 22:30:25,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-21 22:30:25,636 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2018-07-21 22:30:25,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:30:25,637 INFO L225 Difference]: With dead ends: 60 [2018-07-21 22:30:25,637 INFO L226 Difference]: Without dead ends: 52 [2018-07-21 22:30:25,638 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-07-21 22:30:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-07-21 22:30:25,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 22. [2018-07-21 22:30:25,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-21 22:30:25,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-07-21 22:30:25,644 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 11 [2018-07-21 22:30:25,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:30:25,645 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-07-21 22:30:25,645 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-21 22:30:25,645 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-07-21 22:30:25,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-21 22:30:25,646 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:30:25,646 INFO L358 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:30:25,646 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:30:25,647 INFO L82 PathProgramCache]: Analyzing trace with hash 822760862, now seen corresponding path program 2 times [2018-07-21 22:30:25,647 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:30:25,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:30:25,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:25,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:30:25,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:25,781 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:30:25,781 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-21 22:30:25,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:30:25,804 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:30:25,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:30:25,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:30:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:25,885 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:30:25,886 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-07-21 22:30:25,886 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-21 22:30:25,886 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-21 22:30:25,886 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-21 22:30:25,887 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2018-07-21 22:30:26,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:30:26,081 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2018-07-21 22:30:26,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-21 22:30:26,081 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-07-21 22:30:26,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:30:26,083 INFO L225 Difference]: With dead ends: 60 [2018-07-21 22:30:26,083 INFO L226 Difference]: Without dead ends: 48 [2018-07-21 22:30:26,083 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-21 22:30:26,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-07-21 22:30:26,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 20. [2018-07-21 22:30:26,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-21 22:30:26,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-07-21 22:30:26,089 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2018-07-21 22:30:26,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:30:26,089 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-07-21 22:30:26,090 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-21 22:30:26,090 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-07-21 22:30:26,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-21 22:30:26,090 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:30:26,090 INFO L358 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:30:26,090 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:30:26,091 INFO L82 PathProgramCache]: Analyzing trace with hash -990088360, now seen corresponding path program 3 times [2018-07-21 22:30:26,091 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:30:26,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:30:26,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:26,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:30:26,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:26,256 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:30:26,256 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-21 22:30:26,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:30:26,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-07-21 22:30:26,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:30:26,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:30:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:26,349 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:30:26,349 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-07-21 22:30:26,349 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-21 22:30:26,349 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-21 22:30:26,350 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-07-21 22:30:26,350 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 7 states. [2018-07-21 22:30:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:30:26,778 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-07-21 22:30:26,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-21 22:30:26,779 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-07-21 22:30:26,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:30:26,780 INFO L225 Difference]: With dead ends: 65 [2018-07-21 22:30:26,780 INFO L226 Difference]: Without dead ends: 57 [2018-07-21 22:30:26,780 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-07-21 22:30:26,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-07-21 22:30:26,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 22. [2018-07-21 22:30:26,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-21 22:30:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-07-21 22:30:26,785 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2018-07-21 22:30:26,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:30:26,786 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-07-21 22:30:26,786 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-21 22:30:26,786 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-07-21 22:30:26,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-21 22:30:26,787 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:30:26,787 INFO L358 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:30:26,787 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:30:26,787 INFO L82 PathProgramCache]: Analyzing trace with hash 618531474, now seen corresponding path program 4 times [2018-07-21 22:30:26,787 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:30:26,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:30:26,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:26,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:30:26,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:26,912 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:26,912 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:30:26,912 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-21 22:30:26,927 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:30:26,947 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:30:26,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:30:26,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:30:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:27,075 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:30:27,075 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-07-21 22:30:27,075 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-21 22:30:27,075 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-21 22:30:27,076 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-07-21 22:30:27,076 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2018-07-21 22:30:27,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:30:27,381 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-07-21 22:30:27,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-21 22:30:27,381 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-07-21 22:30:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:30:27,382 INFO L225 Difference]: With dead ends: 74 [2018-07-21 22:30:27,382 INFO L226 Difference]: Without dead ends: 66 [2018-07-21 22:30:27,383 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-07-21 22:30:27,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-07-21 22:30:27,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 24. [2018-07-21 22:30:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-21 22:30:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-07-21 22:30:27,388 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2018-07-21 22:30:27,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:30:27,388 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-07-21 22:30:27,388 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-21 22:30:27,388 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-07-21 22:30:27,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-07-21 22:30:27,389 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:30:27,389 INFO L358 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:30:27,389 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:30:27,389 INFO L82 PathProgramCache]: Analyzing trace with hash 313965388, now seen corresponding path program 5 times [2018-07-21 22:30:27,389 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:30:27,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:30:27,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:27,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:30:27,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:27,524 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:30:27,524 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-21 22:30:27,537 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:30:27,567 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-07-21 22:30:27,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:30:27,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:30:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:27,629 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:30:27,629 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-07-21 22:30:27,629 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-21 22:30:27,630 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-21 22:30:27,630 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-07-21 22:30:27,630 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2018-07-21 22:30:27,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:30:27,882 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2018-07-21 22:30:27,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-21 22:30:27,883 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2018-07-21 22:30:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:30:27,884 INFO L225 Difference]: With dead ends: 83 [2018-07-21 22:30:27,884 INFO L226 Difference]: Without dead ends: 75 [2018-07-21 22:30:27,884 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-07-21 22:30:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-07-21 22:30:27,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 26. [2018-07-21 22:30:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-21 22:30:27,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-07-21 22:30:27,896 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2018-07-21 22:30:27,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:30:27,896 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-07-21 22:30:27,896 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-21 22:30:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-07-21 22:30:27,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-21 22:30:27,897 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:30:27,897 INFO L358 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:30:27,897 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:30:27,897 INFO L82 PathProgramCache]: Analyzing trace with hash -316267130, now seen corresponding path program 6 times [2018-07-21 22:30:27,897 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:30:27,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:30:27,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:27,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:30:27,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:28,023 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:30:28,023 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-21 22:30:28,030 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:30:28,100 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-07-21 22:30:28,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:30:28,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:30:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:28,167 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:30:28,167 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-07-21 22:30:28,167 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-21 22:30:28,167 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-21 22:30:28,168 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-07-21 22:30:28,168 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2018-07-21 22:30:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:30:28,316 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-07-21 22:30:28,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-21 22:30:28,316 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2018-07-21 22:30:28,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:30:28,317 INFO L225 Difference]: With dead ends: 92 [2018-07-21 22:30:28,317 INFO L226 Difference]: Without dead ends: 84 [2018-07-21 22:30:28,318 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-07-21 22:30:28,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-07-21 22:30:28,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 28. [2018-07-21 22:30:28,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-07-21 22:30:28,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-07-21 22:30:28,323 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2018-07-21 22:30:28,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:30:28,324 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-07-21 22:30:28,324 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-21 22:30:28,324 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-07-21 22:30:28,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-21 22:30:28,324 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:30:28,324 INFO L358 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:30:28,324 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:30:28,325 INFO L82 PathProgramCache]: Analyzing trace with hash -379328192, now seen corresponding path program 7 times [2018-07-21 22:30:28,325 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:30:28,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:30:28,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:28,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:30:28,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:28,474 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:30:28,474 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:30:28,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:30:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:28,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:30:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:28,536 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:30:28,536 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-07-21 22:30:28,537 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-21 22:30:28,537 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-21 22:30:28,537 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-07-21 22:30:28,537 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 11 states. [2018-07-21 22:30:28,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:30:28,783 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-07-21 22:30:28,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-21 22:30:28,784 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2018-07-21 22:30:28,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:30:28,785 INFO L225 Difference]: With dead ends: 101 [2018-07-21 22:30:28,785 INFO L226 Difference]: Without dead ends: 93 [2018-07-21 22:30:28,786 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-07-21 22:30:28,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-07-21 22:30:28,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 30. [2018-07-21 22:30:28,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-07-21 22:30:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-07-21 22:30:28,795 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2018-07-21 22:30:28,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:30:28,796 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-07-21 22:30:28,796 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-21 22:30:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-07-21 22:30:28,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-21 22:30:28,797 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:30:28,797 INFO L358 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:30:28,797 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:30:28,797 INFO L82 PathProgramCache]: Analyzing trace with hash -851466630, now seen corresponding path program 8 times [2018-07-21 22:30:28,797 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:30:28,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:30:28,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:28,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:30:28,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:29,279 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:30:29,279 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:30:29,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:30:29,301 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:30:29,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:30:29,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:30:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:29,346 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:30:29,346 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-07-21 22:30:29,347 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-21 22:30:29,347 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-21 22:30:29,347 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-07-21 22:30:29,347 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2018-07-21 22:30:29,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:30:29,574 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-07-21 22:30:29,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-21 22:30:29,574 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-07-21 22:30:29,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:30:29,575 INFO L225 Difference]: With dead ends: 110 [2018-07-21 22:30:29,575 INFO L226 Difference]: Without dead ends: 102 [2018-07-21 22:30:29,576 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-07-21 22:30:29,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-07-21 22:30:29,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 32. [2018-07-21 22:30:29,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-21 22:30:29,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-07-21 22:30:29,581 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2018-07-21 22:30:29,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:30:29,581 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-07-21 22:30:29,581 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-21 22:30:29,581 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-07-21 22:30:29,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-07-21 22:30:29,582 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:30:29,582 INFO L358 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:30:29,582 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:30:29,583 INFO L82 PathProgramCache]: Analyzing trace with hash 690027828, now seen corresponding path program 9 times [2018-07-21 22:30:29,583 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:30:29,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:30:29,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:29,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:30:29,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:29,750 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:30:29,750 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:30:29,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:30:30,085 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-07-21 22:30:30,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:30:30,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:30:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:30,140 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:30:30,140 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-07-21 22:30:30,140 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-21 22:30:30,141 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-21 22:30:30,141 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-07-21 22:30:30,141 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 13 states. [2018-07-21 22:30:31,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:30:31,459 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2018-07-21 22:30:31,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-21 22:30:31,491 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2018-07-21 22:30:31,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:30:31,492 INFO L225 Difference]: With dead ends: 119 [2018-07-21 22:30:31,492 INFO L226 Difference]: Without dead ends: 111 [2018-07-21 22:30:31,493 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-07-21 22:30:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-07-21 22:30:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 34. [2018-07-21 22:30:31,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-07-21 22:30:31,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-07-21 22:30:31,498 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2018-07-21 22:30:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:30:31,498 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-07-21 22:30:31,498 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-21 22:30:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-07-21 22:30:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-21 22:30:31,499 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:30:31,499 INFO L358 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:30:31,499 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:30:31,500 INFO L82 PathProgramCache]: Analyzing trace with hash 302484846, now seen corresponding path program 10 times [2018-07-21 22:30:31,500 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:30:31,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:30:31,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:31,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:30:31,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:31,961 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:30:31,961 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:30:31,966 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:30:31,985 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:30:31,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:30:31,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:30:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:32,047 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:30:32,048 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-07-21 22:30:32,048 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-21 22:30:32,048 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-21 22:30:32,048 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-07-21 22:30:32,049 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 14 states. [2018-07-21 22:30:32,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:30:32,520 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-07-21 22:30:32,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-21 22:30:32,521 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2018-07-21 22:30:32,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:30:32,521 INFO L225 Difference]: With dead ends: 128 [2018-07-21 22:30:32,522 INFO L226 Difference]: Without dead ends: 120 [2018-07-21 22:30:32,522 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-07-21 22:30:32,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-07-21 22:30:32,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 36. [2018-07-21 22:30:32,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-21 22:30:32,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-07-21 22:30:32,525 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2018-07-21 22:30:32,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:30:32,526 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-07-21 22:30:32,526 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-21 22:30:32,526 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-07-21 22:30:32,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-07-21 22:30:32,526 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:30:32,527 INFO L358 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:30:32,527 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:30:32,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1535833896, now seen corresponding path program 11 times [2018-07-21 22:30:32,527 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:30:32,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:30:32,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:32,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:30:32,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:32,830 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:30:32,830 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:30:32,836 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:30:32,972 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-07-21 22:30:32,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:30:32,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:30:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:33,032 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:30:33,033 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-07-21 22:30:33,033 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-21 22:30:33,033 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-21 22:30:33,034 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-07-21 22:30:33,034 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 15 states. [2018-07-21 22:30:33,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:30:33,365 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-07-21 22:30:33,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-21 22:30:33,366 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2018-07-21 22:30:33,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:30:33,367 INFO L225 Difference]: With dead ends: 137 [2018-07-21 22:30:33,367 INFO L226 Difference]: Without dead ends: 129 [2018-07-21 22:30:33,367 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-07-21 22:30:33,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-07-21 22:30:33,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 38. [2018-07-21 22:30:33,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-07-21 22:30:33,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-07-21 22:30:33,372 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2018-07-21 22:30:33,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:30:33,372 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-07-21 22:30:33,372 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-21 22:30:33,373 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-07-21 22:30:33,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-21 22:30:33,373 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:30:33,373 INFO L358 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:30:33,373 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:30:33,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1373297250, now seen corresponding path program 12 times [2018-07-21 22:30:33,374 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:30:33,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:30:33,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:33,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:30:33,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:34,132 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:30:34,132 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:30:34,138 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:30:34,261 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-07-21 22:30:34,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:30:34,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:30:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:34,332 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:30:34,333 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-07-21 22:30:34,333 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-21 22:30:34,333 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-21 22:30:34,334 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-07-21 22:30:34,334 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 16 states. [2018-07-21 22:30:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:30:34,870 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-07-21 22:30:34,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-21 22:30:34,870 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2018-07-21 22:30:34,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:30:34,871 INFO L225 Difference]: With dead ends: 146 [2018-07-21 22:30:34,871 INFO L226 Difference]: Without dead ends: 138 [2018-07-21 22:30:34,871 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-07-21 22:30:34,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-07-21 22:30:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 40. [2018-07-21 22:30:34,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-21 22:30:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-07-21 22:30:34,878 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2018-07-21 22:30:34,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:30:34,878 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-07-21 22:30:34,879 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-21 22:30:34,879 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-07-21 22:30:34,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-07-21 22:30:34,879 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:30:34,879 INFO L358 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:30:34,880 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:30:34,880 INFO L82 PathProgramCache]: Analyzing trace with hash -205596900, now seen corresponding path program 13 times [2018-07-21 22:30:34,880 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:30:34,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:30:34,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:34,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:30:34,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:35,227 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:30:35,227 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:30:35,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:30:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:35,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:30:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:35,372 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:30:35,372 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-07-21 22:30:35,372 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-21 22:30:35,373 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-21 22:30:35,373 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-07-21 22:30:35,373 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 17 states. [2018-07-21 22:30:35,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:30:35,736 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2018-07-21 22:30:35,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-21 22:30:35,736 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2018-07-21 22:30:35,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:30:35,737 INFO L225 Difference]: With dead ends: 155 [2018-07-21 22:30:35,737 INFO L226 Difference]: Without dead ends: 147 [2018-07-21 22:30:35,738 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-07-21 22:30:35,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-07-21 22:30:35,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 42. [2018-07-21 22:30:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-07-21 22:30:35,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-07-21 22:30:35,741 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2018-07-21 22:30:35,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:30:35,742 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-07-21 22:30:35,742 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-21 22:30:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-07-21 22:30:35,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-21 22:30:35,743 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:30:35,743 INFO L358 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:30:35,743 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:30:35,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1399419562, now seen corresponding path program 14 times [2018-07-21 22:30:35,743 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:30:35,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:30:35,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:35,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:30:35,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:36,176 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:30:36,176 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:30:36,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:30:36,200 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:30:36,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:30:36,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:30:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:36,296 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:30:36,297 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-07-21 22:30:36,297 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-21 22:30:36,297 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-21 22:30:36,297 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-07-21 22:30:36,298 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 18 states. [2018-07-21 22:30:36,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:30:36,684 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-07-21 22:30:36,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-21 22:30:36,717 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2018-07-21 22:30:36,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:30:36,718 INFO L225 Difference]: With dead ends: 164 [2018-07-21 22:30:36,718 INFO L226 Difference]: Without dead ends: 156 [2018-07-21 22:30:36,718 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-07-21 22:30:36,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-07-21 22:30:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 44. [2018-07-21 22:30:36,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-21 22:30:36,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-07-21 22:30:36,724 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2018-07-21 22:30:36,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:30:36,724 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-07-21 22:30:36,724 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-21 22:30:36,724 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-07-21 22:30:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-07-21 22:30:36,725 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:30:36,725 INFO L358 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:30:36,725 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:30:36,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1906729712, now seen corresponding path program 15 times [2018-07-21 22:30:36,725 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:30:36,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:30:36,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:36,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:30:36,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:30:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:30:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:30:37,424 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:30:37,424 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:30:37,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:31:01,363 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-07-21 22:31:01,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:31:01,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:31:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:31:01,440 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:31:01,440 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-07-21 22:31:01,440 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-21 22:31:01,440 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-21 22:31:01,441 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-07-21 22:31:01,441 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 19 states. [2018-07-21 22:31:01,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:31:01,983 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-07-21 22:31:01,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-21 22:31:01,983 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2018-07-21 22:31:01,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:31:01,984 INFO L225 Difference]: With dead ends: 173 [2018-07-21 22:31:01,984 INFO L226 Difference]: Without dead ends: 165 [2018-07-21 22:31:01,984 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-07-21 22:31:01,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-07-21 22:31:01,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 46. [2018-07-21 22:31:01,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-07-21 22:31:01,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-07-21 22:31:01,990 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2018-07-21 22:31:01,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:31:01,990 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-07-21 22:31:01,990 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-21 22:31:01,990 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-07-21 22:31:01,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-21 22:31:01,991 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:31:01,991 INFO L358 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:31:01,991 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:31:01,992 INFO L82 PathProgramCache]: Analyzing trace with hash 194487882, now seen corresponding path program 16 times [2018-07-21 22:31:01,993 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:31:01,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:31:01,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:31:01,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:31:01,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:31:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:31:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:31:02,261 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:31:02,261 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:31:02,267 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:31:02,283 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:31:02,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:31:02,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:31:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:31:02,347 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:31:02,347 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-07-21 22:31:02,347 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-21 22:31:02,347 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-21 22:31:02,348 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-07-21 22:31:02,348 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 20 states. [2018-07-21 22:31:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:31:02,845 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-07-21 22:31:02,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-21 22:31:02,845 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2018-07-21 22:31:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:31:02,846 INFO L225 Difference]: With dead ends: 182 [2018-07-21 22:31:02,846 INFO L226 Difference]: Without dead ends: 174 [2018-07-21 22:31:02,847 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-07-21 22:31:02,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-07-21 22:31:02,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 48. [2018-07-21 22:31:02,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-07-21 22:31:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-07-21 22:31:02,852 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2018-07-21 22:31:02,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:31:02,852 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-07-21 22:31:02,852 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-21 22:31:02,852 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-07-21 22:31:02,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-07-21 22:31:02,853 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:31:02,853 INFO L358 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:31:02,853 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:31:02,853 INFO L82 PathProgramCache]: Analyzing trace with hash 829966596, now seen corresponding path program 17 times [2018-07-21 22:31:02,853 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:31:02,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:31:02,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:31:02,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:31:02,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:31:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:31:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:31:03,232 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:31:03,232 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:31:03,242 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:31:04,052 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-07-21 22:31:04,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:31:04,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:31:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:31:04,157 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:31:04,157 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-07-21 22:31:04,158 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-21 22:31:04,158 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-21 22:31:04,158 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-07-21 22:31:04,158 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 21 states. [2018-07-21 22:31:04,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:31:04,676 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2018-07-21 22:31:04,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-21 22:31:04,676 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2018-07-21 22:31:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:31:04,677 INFO L225 Difference]: With dead ends: 191 [2018-07-21 22:31:04,677 INFO L226 Difference]: Without dead ends: 183 [2018-07-21 22:31:04,678 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-07-21 22:31:04,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-07-21 22:31:04,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 50. [2018-07-21 22:31:04,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-07-21 22:31:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-07-21 22:31:04,683 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2018-07-21 22:31:04,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:31:04,683 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-07-21 22:31:04,683 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-21 22:31:04,683 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-07-21 22:31:04,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-07-21 22:31:04,685 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:31:04,685 INFO L358 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:31:04,685 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:31:04,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1639654718, now seen corresponding path program 18 times [2018-07-21 22:31:04,685 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:31:04,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:31:04,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:31:04,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:31:04,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:31:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:31:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:31:05,052 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:31:05,052 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:31:05,061 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:31:06,181 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-07-21 22:31:06,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:31:06,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:31:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:31:06,234 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:31:06,234 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-07-21 22:31:06,234 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-21 22:31:06,235 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-21 22:31:06,235 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-07-21 22:31:06,235 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 22 states. [2018-07-21 22:31:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:31:06,905 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-07-21 22:31:06,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-21 22:31:06,905 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2018-07-21 22:31:06,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:31:06,906 INFO L225 Difference]: With dead ends: 200 [2018-07-21 22:31:06,906 INFO L226 Difference]: Without dead ends: 192 [2018-07-21 22:31:06,906 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-07-21 22:31:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-07-21 22:31:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 52. [2018-07-21 22:31:06,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-07-21 22:31:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-07-21 22:31:06,915 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2018-07-21 22:31:06,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:31:06,915 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-07-21 22:31:06,915 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-21 22:31:06,915 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-07-21 22:31:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-07-21 22:31:06,916 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:31:06,916 INFO L358 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:31:06,916 INFO L414 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:31:06,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1934107912, now seen corresponding path program 19 times [2018-07-21 22:31:06,916 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:31:06,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:31:06,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:31:06,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:31:06,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:31:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:31:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:31:07,336 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:31:07,336 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:31:07,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:31:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:31:07,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:31:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:31:07,399 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:31:07,399 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-07-21 22:31:07,399 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-21 22:31:07,399 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-21 22:31:07,399 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-07-21 22:31:07,399 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 23 states. [2018-07-21 22:31:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:31:07,993 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2018-07-21 22:31:07,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-21 22:31:07,993 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2018-07-21 22:31:07,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:31:07,994 INFO L225 Difference]: With dead ends: 209 [2018-07-21 22:31:07,994 INFO L226 Difference]: Without dead ends: 201 [2018-07-21 22:31:07,995 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-07-21 22:31:07,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-07-21 22:31:07,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 54. [2018-07-21 22:31:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-07-21 22:31:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-07-21 22:31:08,000 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2018-07-21 22:31:08,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:31:08,000 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-07-21 22:31:08,000 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-21 22:31:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-07-21 22:31:08,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-07-21 22:31:08,001 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:31:08,001 INFO L358 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:31:08,001 INFO L414 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:31:08,001 INFO L82 PathProgramCache]: Analyzing trace with hash -346158542, now seen corresponding path program 20 times [2018-07-21 22:31:08,001 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:31:08,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:31:08,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:31:08,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:31:08,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:31:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:31:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:31:09,013 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:31:09,013 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:31:09,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:31:09,039 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:31:09,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:31:09,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:31:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:31:09,079 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:31:09,096 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-07-21 22:31:09,096 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-21 22:31:09,096 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-21 22:31:09,096 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-07-21 22:31:09,097 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 24 states. [2018-07-21 22:31:09,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:31:09,878 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-07-21 22:31:09,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-21 22:31:09,880 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2018-07-21 22:31:09,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:31:09,881 INFO L225 Difference]: With dead ends: 218 [2018-07-21 22:31:09,881 INFO L226 Difference]: Without dead ends: 210 [2018-07-21 22:31:09,882 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-07-21 22:31:09,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-07-21 22:31:09,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 56. [2018-07-21 22:31:09,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-07-21 22:31:09,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-07-21 22:31:09,889 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2018-07-21 22:31:09,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:31:09,889 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-07-21 22:31:09,889 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-21 22:31:09,889 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-07-21 22:31:09,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-07-21 22:31:09,890 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:31:09,890 INFO L358 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:31:09,890 INFO L414 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:31:09,890 INFO L82 PathProgramCache]: Analyzing trace with hash 959795948, now seen corresponding path program 21 times [2018-07-21 22:31:09,890 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:31:09,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:31:09,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:31:09,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:31:09,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:31:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:31:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:31:11,322 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:31:11,322 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:31:11,328 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:32:23,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-07-21 22:32:23,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:32:23,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:32:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:32:23,548 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:32:23,548 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-07-21 22:32:23,548 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-21 22:32:23,548 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-21 22:32:23,549 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-07-21 22:32:23,549 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 25 states. [2018-07-21 22:32:24,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:32:24,297 INFO L93 Difference]: Finished difference Result 227 states and 229 transitions. [2018-07-21 22:32:24,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-21 22:32:24,297 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 53 [2018-07-21 22:32:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:32:24,298 INFO L225 Difference]: With dead ends: 227 [2018-07-21 22:32:24,298 INFO L226 Difference]: Without dead ends: 219 [2018-07-21 22:32:24,299 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-07-21 22:32:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-07-21 22:32:24,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 58. [2018-07-21 22:32:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-07-21 22:32:24,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-07-21 22:32:24,303 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2018-07-21 22:32:24,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:32:24,304 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-07-21 22:32:24,304 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-21 22:32:24,304 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-07-21 22:32:24,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-21 22:32:24,305 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:32:24,305 INFO L358 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:32:24,305 INFO L414 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:32:24,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1851610406, now seen corresponding path program 22 times [2018-07-21 22:32:24,305 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:32:24,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:32:24,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:32:24,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:32:24,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:32:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:32:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:32:24,780 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:32:24,780 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:32:24,790 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:32:24,811 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:32:24,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:32:24,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:32:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:32:24,860 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:32:24,860 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-07-21 22:32:24,860 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-21 22:32:24,861 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-21 22:32:24,861 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-07-21 22:32:24,861 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 26 states. [2018-07-21 22:32:25,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:32:25,924 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-07-21 22:32:25,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-21 22:32:25,925 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2018-07-21 22:32:25,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:32:25,926 INFO L225 Difference]: With dead ends: 236 [2018-07-21 22:32:25,926 INFO L226 Difference]: Without dead ends: 228 [2018-07-21 22:32:25,926 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-07-21 22:32:25,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-07-21 22:32:25,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 60. [2018-07-21 22:32:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-07-21 22:32:25,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-07-21 22:32:25,931 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2018-07-21 22:32:25,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:32:25,933 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-07-21 22:32:25,933 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-21 22:32:25,934 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-07-21 22:32:25,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-07-21 22:32:25,934 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:32:25,934 INFO L358 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:32:25,934 INFO L414 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:32:25,935 INFO L82 PathProgramCache]: Analyzing trace with hash -108154656, now seen corresponding path program 23 times [2018-07-21 22:32:25,935 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:32:25,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:32:25,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:32:25,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:32:25,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:32:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:32:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:32:26,492 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:32:26,492 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:32:26,498 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:32:49,090 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-07-21 22:32:49,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:32:49,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:32:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:32:49,161 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:32:49,162 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-07-21 22:32:49,162 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-21 22:32:49,162 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-21 22:32:49,162 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-07-21 22:32:49,163 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 27 states. [2018-07-21 22:32:50,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:32:50,028 INFO L93 Difference]: Finished difference Result 245 states and 247 transitions. [2018-07-21 22:32:50,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-21 22:32:50,029 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 57 [2018-07-21 22:32:50,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:32:50,029 INFO L225 Difference]: With dead ends: 245 [2018-07-21 22:32:50,030 INFO L226 Difference]: Without dead ends: 237 [2018-07-21 22:32:50,030 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-07-21 22:32:50,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-07-21 22:32:50,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 62. [2018-07-21 22:32:50,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-07-21 22:32:50,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-07-21 22:32:50,033 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57 [2018-07-21 22:32:50,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:32:50,033 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-07-21 22:32:50,033 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-21 22:32:50,033 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-07-21 22:32:50,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-07-21 22:32:50,033 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:32:50,033 INFO L358 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:32:50,034 INFO L414 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:32:50,034 INFO L82 PathProgramCache]: Analyzing trace with hash 2048263706, now seen corresponding path program 24 times [2018-07-21 22:32:50,034 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:32:50,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:32:50,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:32:50,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:32:50,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:32:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:32:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:32:50,756 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:32:50,757 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:32:50,767 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:34:06,115 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-07-21 22:34:06,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:34:06,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:34:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:34:06,256 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:34:06,256 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-07-21 22:34:06,257 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-21 22:34:06,257 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-21 22:34:06,257 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-07-21 22:34:06,257 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 28 states. [2018-07-21 22:34:08,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:34:08,187 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2018-07-21 22:34:08,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-21 22:34:08,187 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 59 [2018-07-21 22:34:08,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:34:08,188 INFO L225 Difference]: With dead ends: 254 [2018-07-21 22:34:08,189 INFO L226 Difference]: Without dead ends: 246 [2018-07-21 22:34:08,189 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-07-21 22:34:08,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-07-21 22:34:08,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 64. [2018-07-21 22:34:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-07-21 22:34:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-07-21 22:34:08,194 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2018-07-21 22:34:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:34:08,194 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-07-21 22:34:08,194 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-21 22:34:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-07-21 22:34:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-07-21 22:34:08,195 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:34:08,195 INFO L358 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:34:08,195 INFO L414 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:34:08,196 INFO L82 PathProgramCache]: Analyzing trace with hash -102894380, now seen corresponding path program 25 times [2018-07-21 22:34:08,196 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:34:08,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:34:08,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:34:08,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:34:08,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:34:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:34:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:34:08,641 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:34:08,641 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:34:08,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:34:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:34:08,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:34:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:34:08,718 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:34:08,718 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-07-21 22:34:08,719 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-21 22:34:08,719 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-21 22:34:08,719 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-07-21 22:34:08,719 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 29 states. [2018-07-21 22:34:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:34:09,710 INFO L93 Difference]: Finished difference Result 263 states and 265 transitions. [2018-07-21 22:34:09,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-21 22:34:09,710 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 61 [2018-07-21 22:34:09,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:34:09,711 INFO L225 Difference]: With dead ends: 263 [2018-07-21 22:34:09,711 INFO L226 Difference]: Without dead ends: 255 [2018-07-21 22:34:09,711 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-07-21 22:34:09,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-07-21 22:34:09,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 66. [2018-07-21 22:34:09,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-07-21 22:34:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-07-21 22:34:09,716 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 61 [2018-07-21 22:34:09,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:34:09,716 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-07-21 22:34:09,716 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-21 22:34:09,716 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-07-21 22:34:09,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-07-21 22:34:09,717 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:34:09,717 INFO L358 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:34:09,717 INFO L414 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:34:09,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1486545650, now seen corresponding path program 26 times [2018-07-21 22:34:09,718 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:34:09,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:34:09,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:34:09,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:34:09,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:34:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:34:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:34:10,791 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:34:10,791 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:34:10,797 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:34:10,826 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:34:10,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:34:10,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:34:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:34:10,868 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:34:10,868 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-07-21 22:34:10,868 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-21 22:34:10,868 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-21 22:34:10,868 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-07-21 22:34:10,868 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 30 states. [2018-07-21 22:34:11,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:34:11,933 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2018-07-21 22:34:11,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-21 22:34:11,933 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 63 [2018-07-21 22:34:11,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:34:11,934 INFO L225 Difference]: With dead ends: 272 [2018-07-21 22:34:11,934 INFO L226 Difference]: Without dead ends: 264 [2018-07-21 22:34:11,934 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-07-21 22:34:11,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-07-21 22:34:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 68. [2018-07-21 22:34:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-07-21 22:34:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-07-21 22:34:11,937 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2018-07-21 22:34:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:34:11,937 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-07-21 22:34:11,937 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-21 22:34:11,937 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-07-21 22:34:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-07-21 22:34:11,938 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:34:11,938 INFO L358 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:34:11,938 INFO L414 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:34:11,938 INFO L82 PathProgramCache]: Analyzing trace with hash 264445640, now seen corresponding path program 27 times [2018-07-21 22:34:11,938 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:34:11,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:34:11,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:34:11,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:34:11,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:34:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:34:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:34:12,720 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:34:12,720 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:34:12,727 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:34:44,019 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-07-21 22:34:44,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:34:44,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:34:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:34:44,097 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:34:44,097 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-07-21 22:34:44,097 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-21 22:34:44,098 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-21 22:34:44,098 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-07-21 22:34:44,098 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 31 states. [2018-07-21 22:34:45,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:34:45,359 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2018-07-21 22:34:45,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-21 22:34:45,360 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 65 [2018-07-21 22:34:45,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:34:45,360 INFO L225 Difference]: With dead ends: 281 [2018-07-21 22:34:45,360 INFO L226 Difference]: Without dead ends: 273 [2018-07-21 22:34:45,361 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-07-21 22:34:45,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-07-21 22:34:45,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 70. [2018-07-21 22:34:45,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-07-21 22:34:45,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-07-21 22:34:45,366 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2018-07-21 22:34:45,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:34:45,366 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-07-21 22:34:45,367 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-21 22:34:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-07-21 22:34:45,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-07-21 22:34:45,367 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:34:45,367 INFO L358 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:34:45,368 INFO L414 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:34:45,368 INFO L82 PathProgramCache]: Analyzing trace with hash -660104702, now seen corresponding path program 28 times [2018-07-21 22:34:45,368 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:34:45,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:34:45,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:34:45,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:34:45,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:34:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:34:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:34:45,916 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:34:45,916 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:34:45,922 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:34:45,954 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:34:45,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:34:45,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:34:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:34:46,004 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:34:46,004 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-07-21 22:34:46,005 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-21 22:34:46,005 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-21 22:34:46,005 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-07-21 22:34:46,005 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 32 states. [2018-07-21 22:34:47,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:34:47,213 INFO L93 Difference]: Finished difference Result 290 states and 292 transitions. [2018-07-21 22:34:47,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-21 22:34:47,247 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 67 [2018-07-21 22:34:47,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:34:47,248 INFO L225 Difference]: With dead ends: 290 [2018-07-21 22:34:47,248 INFO L226 Difference]: Without dead ends: 282 [2018-07-21 22:34:47,249 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-07-21 22:34:47,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-07-21 22:34:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 72. [2018-07-21 22:34:47,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-07-21 22:34:47,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-07-21 22:34:47,254 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2018-07-21 22:34:47,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:34:47,254 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-07-21 22:34:47,254 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-21 22:34:47,254 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-07-21 22:34:47,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-07-21 22:34:47,255 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:34:47,255 INFO L358 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:34:47,255 INFO L414 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:34:47,256 INFO L82 PathProgramCache]: Analyzing trace with hash -94753092, now seen corresponding path program 29 times [2018-07-21 22:34:47,256 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:34:47,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:34:47,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:34:47,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:34:47,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:34:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:34:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:34:47,849 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:34:47,849 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:34:47,856 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown