java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007_true-unreach-call_true-termination.c.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:50:17,020 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:50:17,022 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:50:17,035 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:50:17,035 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:50:17,036 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:50:17,038 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:50:17,040 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:50:17,041 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:50:17,042 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:50:17,044 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:50:17,045 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:50:17,046 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:50:17,047 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:50:17,048 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:50:17,051 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:50:17,052 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:50:17,061 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:50:17,063 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:50:17,068 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:50:17,071 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:50:17,073 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:50:17,075 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:50:17,092 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-22 15:50:17,121 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:50:17,121 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:50:17,122 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:50:17,122 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:50:17,123 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:50:17,123 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:50:17,124 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:50:17,124 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:50:17,124 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:50:17,124 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:50:17,124 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:50:17,125 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:50:17,125 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:50:17,125 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:50:17,125 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:50:17,125 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:50:17,126 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:50:17,127 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:50:17,127 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:50:17,127 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:50:17,127 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:50:17,127 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:50:17,128 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:50:17,128 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:50:17,128 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:50:17,128 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:50:17,129 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:50:17,130 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:50:17,173 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:50:17,186 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:50:17,190 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:50:17,192 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:50:17,192 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:50:17,193 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/gj2007_true-unreach-call_true-termination.c.i [2018-10-22 15:50:17,266 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f04e857b9/0ac497b8e266465c96786d42fca44aa1/FLAG0749b87aa [2018-10-22 15:50:17,742 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:50:17,742 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007_true-unreach-call_true-termination.c.i [2018-10-22 15:50:17,748 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f04e857b9/0ac497b8e266465c96786d42fca44aa1/FLAG0749b87aa [2018-10-22 15:50:17,763 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f04e857b9/0ac497b8e266465c96786d42fca44aa1 [2018-10-22 15:50:17,774 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:50:17,775 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:50:17,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:50:17,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:50:17,781 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:50:17,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:50:17" (1/1) ... [2018-10-22 15:50:17,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3502ec3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:17, skipping insertion in model container [2018-10-22 15:50:17,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:50:17" (1/1) ... [2018-10-22 15:50:17,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:50:17,817 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:50:17,980 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:50:17,986 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:50:18,004 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:50:18,021 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:50:18,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:18 WrapperNode [2018-10-22 15:50:18,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:50:18,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:50:18,023 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:50:18,023 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:50:18,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:18" (1/1) ... [2018-10-22 15:50:18,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:18" (1/1) ... [2018-10-22 15:50:18,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:50:18,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:50:18,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:50:18,061 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:50:18,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:18" (1/1) ... [2018-10-22 15:50:18,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:18" (1/1) ... [2018-10-22 15:50:18,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:18" (1/1) ... [2018-10-22 15:50:18,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:18" (1/1) ... [2018-10-22 15:50:18,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:18" (1/1) ... [2018-10-22 15:50:18,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:18" (1/1) ... [2018-10-22 15:50:18,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:18" (1/1) ... [2018-10-22 15:50:18,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:50:18,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:50:18,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:50:18,083 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:50:18,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:50:18,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:50:18,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:50:18,439 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:50:18,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:50:18 BoogieIcfgContainer [2018-10-22 15:50:18,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:50:18,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:50:18,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:50:18,445 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:50:18,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:50:17" (1/3) ... [2018-10-22 15:50:18,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39bbc5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:50:18, skipping insertion in model container [2018-10-22 15:50:18,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:18" (2/3) ... [2018-10-22 15:50:18,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39bbc5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:50:18, skipping insertion in model container [2018-10-22 15:50:18,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:50:18" (3/3) ... [2018-10-22 15:50:18,449 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007_true-unreach-call_true-termination.c.i [2018-10-22 15:50:18,460 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:50:18,467 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:50:18,484 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:50:18,518 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:50:18,519 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:50:18,519 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:50:18,519 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:50:18,519 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:50:18,519 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:50:18,520 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:50:18,520 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:50:18,520 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:50:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-10-22 15:50:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-22 15:50:18,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:18,545 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-22 15:50:18,551 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:18,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:18,558 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2018-10-22 15:50:18,560 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:18,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:18,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:18,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:18,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:18,680 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:50:18,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:50:18,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:50:18,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:50:18,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:50:18,699 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-10-22 15:50:18,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:18,720 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-22 15:50:18,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:50:18,722 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-22 15:50:18,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:18,739 INFO L225 Difference]: With dead ends: 21 [2018-10-22 15:50:18,739 INFO L226 Difference]: Without dead ends: 9 [2018-10-22 15:50:18,745 INFO L605 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 [2018-10-22 15:50:18,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-22 15:50:18,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-22 15:50:18,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-22 15:50:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-22 15:50:18,775 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-22 15:50:18,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:18,775 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-22 15:50:18,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:50:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-22 15:50:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-22 15:50:18,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:18,776 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:18,776 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:18,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:18,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1805929617, now seen corresponding path program 1 times [2018-10-22 15:50:18,777 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:18,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:18,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:18,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:18,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:18,847 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:50:18,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:50:18,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:50:18,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:50:18,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:50:18,854 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-10-22 15:50:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:18,977 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2018-10-22 15:50:18,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:50:18,978 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-22 15:50:18,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:18,979 INFO L225 Difference]: With dead ends: 19 [2018-10-22 15:50:18,979 INFO L226 Difference]: Without dead ends: 12 [2018-10-22 15:50:18,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:50:18,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-22 15:50:18,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-22 15:50:18,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-22 15:50:18,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-10-22 15:50:18,984 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2018-10-22 15:50:18,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:18,984 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-10-22 15:50:18,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:50:18,985 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-10-22 15:50:18,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:50:18,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:18,985 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:18,986 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:18,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:18,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1049525042, now seen corresponding path program 1 times [2018-10-22 15:50:18,986 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:18,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:18,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:18,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:18,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:19,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:19,089 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:19,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:19,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:19,202 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:50:19,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-22 15:50:19,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:50:19,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:50:19,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:50:19,204 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2018-10-22 15:50:19,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:19,252 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-10-22 15:50:19,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:50:19,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-10-22 15:50:19,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:19,254 INFO L225 Difference]: With dead ends: 25 [2018-10-22 15:50:19,254 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 15:50:19,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:50:19,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 15:50:19,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-22 15:50:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-22 15:50:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-22 15:50:19,260 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 10 [2018-10-22 15:50:19,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:19,261 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-22 15:50:19,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:50:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-22 15:50:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 15:50:19,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:19,262 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:19,262 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:19,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:19,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1721888980, now seen corresponding path program 1 times [2018-10-22 15:50:19,263 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:19,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:19,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:19,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:19,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:19,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:19,333 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:19,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:19,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:19,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:19,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-22 15:50:19,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:50:19,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:50:19,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:50:19,401 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2018-10-22 15:50:19,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:19,454 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-10-22 15:50:19,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:50:19,457 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-10-22 15:50:19,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:19,458 INFO L225 Difference]: With dead ends: 29 [2018-10-22 15:50:19,458 INFO L226 Difference]: Without dead ends: 20 [2018-10-22 15:50:19,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:50:19,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-22 15:50:19,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-22 15:50:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-22 15:50:19,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-22 15:50:19,463 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2018-10-22 15:50:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:19,463 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-22 15:50:19,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:50:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-22 15:50:19,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 15:50:19,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:19,464 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:19,464 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:19,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:19,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1066415217, now seen corresponding path program 2 times [2018-10-22 15:50:19,465 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:19,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:19,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:19,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:19,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:19,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:19,636 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:19,654 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:19,701 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:19,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:19,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:19,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:19,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-22 15:50:19,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:50:19,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:50:19,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:50:19,749 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2018-10-22 15:50:19,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:19,895 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-10-22 15:50:19,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:50:19,896 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-10-22 15:50:19,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:19,897 INFO L225 Difference]: With dead ends: 32 [2018-10-22 15:50:19,897 INFO L226 Difference]: Without dead ends: 23 [2018-10-22 15:50:19,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:50:19,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-22 15:50:19,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-22 15:50:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-22 15:50:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-22 15:50:19,902 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2018-10-22 15:50:19,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:19,903 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-22 15:50:19,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:50:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-22 15:50:19,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 15:50:19,904 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:19,904 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:19,904 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:19,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:19,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1231130700, now seen corresponding path program 3 times [2018-10-22 15:50:19,905 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:19,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:19,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:19,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:19,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:20,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:20,085 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:20,100 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:20,114 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-22 15:50:20,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:20,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-22 15:50:20,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:20,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2018-10-22 15:50:20,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:50:20,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:50:20,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:50:20,197 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2018-10-22 15:50:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:20,358 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2018-10-22 15:50:20,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:50:20,358 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-10-22 15:50:20,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:20,361 INFO L225 Difference]: With dead ends: 39 [2018-10-22 15:50:20,361 INFO L226 Difference]: Without dead ends: 30 [2018-10-22 15:50:20,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:50:20,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-22 15:50:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-22 15:50:20,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-22 15:50:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-10-22 15:50:20,368 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2018-10-22 15:50:20,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:20,368 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-10-22 15:50:20,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:50:20,368 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-10-22 15:50:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-22 15:50:20,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:20,369 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 5, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:20,370 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:20,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:20,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1951438702, now seen corresponding path program 4 times [2018-10-22 15:50:20,370 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:20,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:20,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:20,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:20,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:50:20,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:20,490 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:20,505 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:20,517 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:20,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:20,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:50:20,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:20,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-22 15:50:20,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:50:20,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:50:20,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:50:20,552 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 8 states. [2018-10-22 15:50:20,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:20,653 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2018-10-22 15:50:20,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:50:20,654 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2018-10-22 15:50:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:20,655 INFO L225 Difference]: With dead ends: 44 [2018-10-22 15:50:20,655 INFO L226 Difference]: Without dead ends: 32 [2018-10-22 15:50:20,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:50:20,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-22 15:50:20,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-22 15:50:20,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-22 15:50:20,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-22 15:50:20,661 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2018-10-22 15:50:20,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:20,662 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-22 15:50:20,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:50:20,662 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-22 15:50:20,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-22 15:50:20,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:20,663 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:20,663 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:20,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:20,664 INFO L82 PathProgramCache]: Analyzing trace with hash -11282607, now seen corresponding path program 5 times [2018-10-22 15:50:20,664 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:20,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:20,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:20,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:20,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 35 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:50:21,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:21,141 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:21,153 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:21,178 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-22 15:50:21,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:21,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 35 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:50:21,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:21,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-22 15:50:21,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:50:21,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:50:21,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:50:21,216 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2018-10-22 15:50:21,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:21,262 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2018-10-22 15:50:21,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:50:21,263 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2018-10-22 15:50:21,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:21,264 INFO L225 Difference]: With dead ends: 47 [2018-10-22 15:50:21,264 INFO L226 Difference]: Without dead ends: 35 [2018-10-22 15:50:21,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:50:21,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-22 15:50:21,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-22 15:50:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-22 15:50:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-22 15:50:21,269 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2018-10-22 15:50:21,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:21,270 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-22 15:50:21,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:50:21,270 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-22 15:50:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-22 15:50:21,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:21,271 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 7, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:21,271 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:21,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:21,272 INFO L82 PathProgramCache]: Analyzing trace with hash 242968718, now seen corresponding path program 6 times [2018-10-22 15:50:21,272 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:21,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:21,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:21,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:21,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 40 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:50:21,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:21,544 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:21,552 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:21,585 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-22 15:50:21,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:21,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 56 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-10-22 15:50:21,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:21,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2018-10-22 15:50:21,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:50:21,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:50:21,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:50:21,733 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 13 states. [2018-10-22 15:50:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:21,871 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2018-10-22 15:50:21,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:50:21,872 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2018-10-22 15:50:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:21,873 INFO L225 Difference]: With dead ends: 54 [2018-10-22 15:50:21,873 INFO L226 Difference]: Without dead ends: 42 [2018-10-22 15:50:21,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:50:21,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-22 15:50:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-22 15:50:21,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-22 15:50:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-10-22 15:50:21,881 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2018-10-22 15:50:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:21,881 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-10-22 15:50:21,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:50:21,887 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-10-22 15:50:21,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-22 15:50:21,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:21,888 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 8, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:21,888 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:21,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:21,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2085606292, now seen corresponding path program 7 times [2018-10-22 15:50:21,889 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:21,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:21,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:21,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:21,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 72 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-22 15:50:22,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:22,101 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:22,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:22,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 72 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-22 15:50:22,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:22,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-22 15:50:22,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:50:22,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:50:22,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:50:22,165 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 11 states. [2018-10-22 15:50:22,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:22,505 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-10-22 15:50:22,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:50:22,505 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2018-10-22 15:50:22,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:22,506 INFO L225 Difference]: With dead ends: 59 [2018-10-22 15:50:22,506 INFO L226 Difference]: Without dead ends: 44 [2018-10-22 15:50:22,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:50:22,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-22 15:50:22,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-22 15:50:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-22 15:50:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2018-10-22 15:50:22,512 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 40 [2018-10-22 15:50:22,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:22,513 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2018-10-22 15:50:22,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:50:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2018-10-22 15:50:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-22 15:50:22,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:22,514 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 9, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:22,515 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:22,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:22,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1593552847, now seen corresponding path program 8 times [2018-10-22 15:50:22,515 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:22,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:22,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:22,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:22,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 80 proven. 135 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-22 15:50:22,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:22,775 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:22,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:22,799 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:22,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:22,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 80 proven. 135 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-22 15:50:22,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:22,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-22 15:50:22,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:50:22,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:50:22,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:50:22,838 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 12 states. [2018-10-22 15:50:22,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:22,946 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2018-10-22 15:50:22,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:50:22,946 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2018-10-22 15:50:22,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:22,947 INFO L225 Difference]: With dead ends: 62 [2018-10-22 15:50:22,948 INFO L226 Difference]: Without dead ends: 47 [2018-10-22 15:50:22,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:50:22,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-22 15:50:22,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-22 15:50:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-22 15:50:22,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2018-10-22 15:50:22,955 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 43 [2018-10-22 15:50:22,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:22,955 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2018-10-22 15:50:22,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:50:22,955 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2018-10-22 15:50:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-22 15:50:22,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:22,956 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 10, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:22,957 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:22,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:22,957 INFO L82 PathProgramCache]: Analyzing trace with hash -141931124, now seen corresponding path program 9 times [2018-10-22 15:50:22,957 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:22,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:22,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:22,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:22,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 88 proven. 165 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-22 15:50:23,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:23,113 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:23,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:23,141 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-22 15:50:23,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:23,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 110 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2018-10-22 15:50:23,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:23,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2018-10-22 15:50:23,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:50:23,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:50:23,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:50:23,275 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 17 states. [2018-10-22 15:50:23,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:23,377 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2018-10-22 15:50:23,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:50:23,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2018-10-22 15:50:23,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:23,378 INFO L225 Difference]: With dead ends: 69 [2018-10-22 15:50:23,379 INFO L226 Difference]: Without dead ends: 54 [2018-10-22 15:50:23,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:50:23,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-22 15:50:23,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-10-22 15:50:23,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-22 15:50:23,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-10-22 15:50:23,388 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 46 [2018-10-22 15:50:23,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:23,388 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-10-22 15:50:23,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:50:23,389 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-10-22 15:50:23,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-22 15:50:23,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:23,390 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 11, 4, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:23,390 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:23,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:23,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1643779282, now seen corresponding path program 10 times [2018-10-22 15:50:23,391 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:23,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:23,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:23,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:23,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 132 proven. 198 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-22 15:50:23,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:23,598 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-22 15:50:23,606 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:23,622 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:23,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:23,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 132 proven. 198 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-22 15:50:23,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:23,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-22 15:50:23,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:50:23,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:50:23,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:50:23,661 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 14 states. [2018-10-22 15:50:23,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:23,737 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2018-10-22 15:50:23,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:50:23,737 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2018-10-22 15:50:23,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:23,739 INFO L225 Difference]: With dead ends: 74 [2018-10-22 15:50:23,739 INFO L226 Difference]: Without dead ends: 56 [2018-10-22 15:50:23,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:50:23,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-22 15:50:23,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-22 15:50:23,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-22 15:50:23,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-10-22 15:50:23,746 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 52 [2018-10-22 15:50:23,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:23,747 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-10-22 15:50:23,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:50:23,747 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-10-22 15:50:23,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-22 15:50:23,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:23,748 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 12, 4, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:23,749 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:23,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:23,749 INFO L82 PathProgramCache]: Analyzing trace with hash 701526545, now seen corresponding path program 11 times [2018-10-22 15:50:23,749 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:23,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:23,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:23,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:23,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 143 proven. 234 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-22 15:50:23,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:23,939 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:23,949 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:23,975 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-10-22 15:50:23,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:23,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 143 proven. 234 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-22 15:50:24,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:24,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-22 15:50:24,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:50:24,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:50:24,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:50:24,019 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 15 states. [2018-10-22 15:50:24,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:24,110 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2018-10-22 15:50:24,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:50:24,110 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2018-10-22 15:50:24,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:24,111 INFO L225 Difference]: With dead ends: 77 [2018-10-22 15:50:24,111 INFO L226 Difference]: Without dead ends: 59 [2018-10-22 15:50:24,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:50:24,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-22 15:50:24,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-22 15:50:24,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-22 15:50:24,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2018-10-22 15:50:24,118 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 55 [2018-10-22 15:50:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:24,119 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2018-10-22 15:50:24,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:50:24,119 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2018-10-22 15:50:24,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-22 15:50:24,120 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:24,120 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 13, 4, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:24,121 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:24,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:24,121 INFO L82 PathProgramCache]: Analyzing trace with hash -820552626, now seen corresponding path program 12 times [2018-10-22 15:50:24,121 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:24,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:24,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:24,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:24,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 154 proven. 273 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-22 15:50:24,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:24,560 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:24,574 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:24,608 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-10-22 15:50:24,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:24,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 182 proven. 26 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-10-22 15:50:24,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:24,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 21 [2018-10-22 15:50:24,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:50:24,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:50:24,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:50:24,756 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 21 states. [2018-10-22 15:50:24,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:24,897 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2018-10-22 15:50:24,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 15:50:24,898 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2018-10-22 15:50:24,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:24,899 INFO L225 Difference]: With dead ends: 84 [2018-10-22 15:50:24,899 INFO L226 Difference]: Without dead ends: 66 [2018-10-22 15:50:24,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:50:24,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-22 15:50:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-10-22 15:50:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-22 15:50:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2018-10-22 15:50:24,908 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 58 [2018-10-22 15:50:24,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:24,908 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2018-10-22 15:50:24,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:50:24,909 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2018-10-22 15:50:24,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-22 15:50:24,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:24,910 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 14, 5, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:24,910 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:24,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:24,911 INFO L82 PathProgramCache]: Analyzing trace with hash -176473684, now seen corresponding path program 13 times [2018-10-22 15:50:24,911 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:24,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:24,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:24,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:24,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 210 proven. 315 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-22 15:50:25,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:25,334 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:25,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:25,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 210 proven. 315 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-22 15:50:25,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:25,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-22 15:50:25,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:50:25,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:50:25,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:50:25,428 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 17 states. [2018-10-22 15:50:25,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:25,502 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2018-10-22 15:50:25,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:50:25,503 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2018-10-22 15:50:25,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:25,504 INFO L225 Difference]: With dead ends: 89 [2018-10-22 15:50:25,505 INFO L226 Difference]: Without dead ends: 68 [2018-10-22 15:50:25,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:50:25,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-22 15:50:25,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-22 15:50:25,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-22 15:50:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2018-10-22 15:50:25,512 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 64 [2018-10-22 15:50:25,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:25,513 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2018-10-22 15:50:25,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:50:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2018-10-22 15:50:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-22 15:50:25,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:25,514 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 15, 5, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:25,514 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:25,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:25,515 INFO L82 PathProgramCache]: Analyzing trace with hash 903578639, now seen corresponding path program 14 times [2018-10-22 15:50:25,515 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:25,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:25,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:25,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:25,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 224 proven. 360 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-22 15:50:26,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:26,393 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:26,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:26,447 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:26,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:26,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 224 proven. 360 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-22 15:50:26,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:26,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-22 15:50:26,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:50:26,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:50:26,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:50:26,498 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 18 states. [2018-10-22 15:50:26,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:26,587 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2018-10-22 15:50:26,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:50:26,587 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2018-10-22 15:50:26,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:26,588 INFO L225 Difference]: With dead ends: 92 [2018-10-22 15:50:26,588 INFO L226 Difference]: Without dead ends: 71 [2018-10-22 15:50:26,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:50:26,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-22 15:50:26,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-22 15:50:26,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-22 15:50:26,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2018-10-22 15:50:26,596 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 67 [2018-10-22 15:50:26,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:26,596 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2018-10-22 15:50:26,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:50:26,596 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2018-10-22 15:50:26,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-22 15:50:26,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:26,601 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 16, 5, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:26,601 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:26,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:26,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1152648500, now seen corresponding path program 15 times [2018-10-22 15:50:26,604 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:26,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:26,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:26,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:26,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 238 proven. 408 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-22 15:50:27,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:27,011 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:27,022 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:27,035 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-22 15:50:27,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:27,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 272 proven. 40 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2018-10-22 15:50:27,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:27,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2018-10-22 15:50:27,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:50:27,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:50:27,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:50:27,219 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 25 states. [2018-10-22 15:50:27,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:27,465 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2018-10-22 15:50:27,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-22 15:50:27,466 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 70 [2018-10-22 15:50:27,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:27,467 INFO L225 Difference]: With dead ends: 99 [2018-10-22 15:50:27,467 INFO L226 Difference]: Without dead ends: 78 [2018-10-22 15:50:27,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:50:27,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-22 15:50:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-10-22 15:50:27,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-22 15:50:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2018-10-22 15:50:27,474 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 70 [2018-10-22 15:50:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:27,474 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2018-10-22 15:50:27,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:50:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2018-10-22 15:50:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-22 15:50:27,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:27,475 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 17, 6, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:27,475 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:27,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:27,475 INFO L82 PathProgramCache]: Analyzing trace with hash 767643374, now seen corresponding path program 16 times [2018-10-22 15:50:27,475 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:27,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:27,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:27,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:27,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 306 proven. 459 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 15:50:27,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:27,728 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:27,736 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:27,768 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:27,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:27,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 306 proven. 459 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 15:50:27,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:27,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-22 15:50:27,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:50:27,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:50:27,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:50:27,810 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand 20 states. [2018-10-22 15:50:27,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:27,959 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2018-10-22 15:50:27,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:50:27,959 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 76 [2018-10-22 15:50:27,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:27,961 INFO L225 Difference]: With dead ends: 104 [2018-10-22 15:50:27,961 INFO L226 Difference]: Without dead ends: 80 [2018-10-22 15:50:27,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:50:27,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-22 15:50:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-22 15:50:27,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-22 15:50:27,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2018-10-22 15:50:27,968 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 76 [2018-10-22 15:50:27,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:27,969 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2018-10-22 15:50:27,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:50:27,969 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2018-10-22 15:50:27,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-22 15:50:27,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:27,970 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 18, 6, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:27,970 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:27,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:27,970 INFO L82 PathProgramCache]: Analyzing trace with hash -89252655, now seen corresponding path program 17 times [2018-10-22 15:50:27,970 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:27,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:27,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:27,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:27,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 323 proven. 513 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 15:50:28,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:28,285 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:28,292 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:28,342 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-22 15:50:28,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:28,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 323 proven. 513 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 15:50:28,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:28,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-22 15:50:28,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:50:28,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:50:28,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:50:28,396 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 21 states. [2018-10-22 15:50:29,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:29,036 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2018-10-22 15:50:29,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 15:50:29,037 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 79 [2018-10-22 15:50:29,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:29,038 INFO L225 Difference]: With dead ends: 107 [2018-10-22 15:50:29,038 INFO L226 Difference]: Without dead ends: 83 [2018-10-22 15:50:29,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:50:29,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-22 15:50:29,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-22 15:50:29,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-22 15:50:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2018-10-22 15:50:29,043 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 79 [2018-10-22 15:50:29,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:29,043 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2018-10-22 15:50:29,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:50:29,044 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2018-10-22 15:50:29,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-22 15:50:29,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:29,044 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 19, 6, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:29,045 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:29,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:29,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1406754830, now seen corresponding path program 18 times [2018-10-22 15:50:29,045 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:29,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:29,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:29,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:29,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 340 proven. 570 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 15:50:29,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:29,391 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:29,399 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:29,478 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-22 15:50:29,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:29,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 380 proven. 57 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2018-10-22 15:50:29,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:29,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2018-10-22 15:50:29,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:50:29,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:50:29,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:50:29,695 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 29 states. [2018-10-22 15:50:29,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:29,861 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2018-10-22 15:50:29,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:50:29,862 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 82 [2018-10-22 15:50:29,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:29,863 INFO L225 Difference]: With dead ends: 114 [2018-10-22 15:50:29,863 INFO L226 Difference]: Without dead ends: 90 [2018-10-22 15:50:29,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:50:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-22 15:50:29,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-10-22 15:50:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-22 15:50:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2018-10-22 15:50:29,869 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 82 [2018-10-22 15:50:29,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:29,869 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2018-10-22 15:50:29,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:50:29,869 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2018-10-22 15:50:29,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-22 15:50:29,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:29,870 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 20, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:29,871 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:29,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:29,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1722496748, now seen corresponding path program 19 times [2018-10-22 15:50:29,871 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:29,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:29,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:29,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:29,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 420 proven. 630 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:50:30,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:30,243 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:30,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:30,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 420 proven. 630 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:50:30,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:30,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-22 15:50:30,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:50:30,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:50:30,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:50:30,332 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 23 states. [2018-10-22 15:50:30,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:30,516 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2018-10-22 15:50:30,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:50:30,519 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 88 [2018-10-22 15:50:30,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:30,520 INFO L225 Difference]: With dead ends: 119 [2018-10-22 15:50:30,520 INFO L226 Difference]: Without dead ends: 92 [2018-10-22 15:50:30,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:50:30,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-22 15:50:30,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-22 15:50:30,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-22 15:50:30,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2018-10-22 15:50:30,524 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 88 [2018-10-22 15:50:30,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:30,525 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2018-10-22 15:50:30,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:50:30,525 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2018-10-22 15:50:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-22 15:50:30,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:30,526 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 21, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:30,526 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:30,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:30,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1678030769, now seen corresponding path program 20 times [2018-10-22 15:50:30,526 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:30,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:30,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:30,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:30,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 440 proven. 693 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:50:30,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:30,889 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:30,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:30,918 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:30,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:30,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 440 proven. 693 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:50:30,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:30,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-22 15:50:30,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:50:30,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:50:30,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:50:30,965 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 24 states. [2018-10-22 15:50:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:31,182 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2018-10-22 15:50:31,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:50:31,183 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 91 [2018-10-22 15:50:31,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:31,184 INFO L225 Difference]: With dead ends: 122 [2018-10-22 15:50:31,184 INFO L226 Difference]: Without dead ends: 95 [2018-10-22 15:50:31,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:50:31,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-22 15:50:31,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-22 15:50:31,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-22 15:50:31,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2018-10-22 15:50:31,188 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 91 [2018-10-22 15:50:31,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:31,188 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2018-10-22 15:50:31,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:50:31,189 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2018-10-22 15:50:31,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-22 15:50:31,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:31,189 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 22, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:31,190 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:31,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:31,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1399678964, now seen corresponding path program 21 times [2018-10-22 15:50:31,190 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:31,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:31,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:31,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:31,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 460 proven. 759 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:50:31,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:31,686 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:31,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:31,717 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-22 15:50:31,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:31,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 506 proven. 77 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2018-10-22 15:50:32,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:32,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2018-10-22 15:50:32,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:50:32,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:50:32,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:50:32,274 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 33 states. [2018-10-22 15:50:32,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:32,441 INFO L93 Difference]: Finished difference Result 129 states and 147 transitions. [2018-10-22 15:50:32,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-22 15:50:32,442 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 94 [2018-10-22 15:50:32,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:32,443 INFO L225 Difference]: With dead ends: 129 [2018-10-22 15:50:32,443 INFO L226 Difference]: Without dead ends: 102 [2018-10-22 15:50:32,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:50:32,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-22 15:50:32,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2018-10-22 15:50:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-22 15:50:32,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2018-10-22 15:50:32,449 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 94 [2018-10-22 15:50:32,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:32,449 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2018-10-22 15:50:32,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:50:32,449 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2018-10-22 15:50:32,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-22 15:50:32,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:32,450 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 23, 8, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:32,450 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:32,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:32,451 INFO L82 PathProgramCache]: Analyzing trace with hash -183057746, now seen corresponding path program 22 times [2018-10-22 15:50:32,451 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:32,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:32,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:32,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:32,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 552 proven. 828 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-22 15:50:33,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:33,074 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:33,081 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:33,105 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:33,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:33,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 552 proven. 828 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-22 15:50:33,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:33,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-22 15:50:33,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:50:33,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:50:33,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:50:33,146 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 26 states. [2018-10-22 15:50:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:33,239 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2018-10-22 15:50:33,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:50:33,240 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 100 [2018-10-22 15:50:33,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:33,242 INFO L225 Difference]: With dead ends: 134 [2018-10-22 15:50:33,242 INFO L226 Difference]: Without dead ends: 104 [2018-10-22 15:50:33,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:50:33,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-22 15:50:33,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-22 15:50:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-22 15:50:33,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2018-10-22 15:50:33,247 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 100 [2018-10-22 15:50:33,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:33,247 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2018-10-22 15:50:33,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:50:33,247 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2018-10-22 15:50:33,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-22 15:50:33,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:33,248 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 24, 8, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:33,248 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:33,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:33,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1568614511, now seen corresponding path program 23 times [2018-10-22 15:50:33,249 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:33,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:33,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:33,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:33,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 575 proven. 900 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-22 15:50:34,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:34,701 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:34,710 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:34,756 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2018-10-22 15:50:34,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:34,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 575 proven. 900 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-22 15:50:34,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:34,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-22 15:50:34,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:50:34,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:50:34,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:50:34,807 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 27 states. [2018-10-22 15:50:34,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:34,936 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2018-10-22 15:50:34,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 15:50:34,937 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 103 [2018-10-22 15:50:34,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:34,938 INFO L225 Difference]: With dead ends: 137 [2018-10-22 15:50:34,938 INFO L226 Difference]: Without dead ends: 107 [2018-10-22 15:50:34,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:50:34,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-22 15:50:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-22 15:50:34,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-22 15:50:34,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2018-10-22 15:50:34,944 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 103 [2018-10-22 15:50:34,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:34,944 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2018-10-22 15:50:34,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:50:34,944 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2018-10-22 15:50:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-22 15:50:34,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:34,945 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 25, 8, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:34,945 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:34,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:34,945 INFO L82 PathProgramCache]: Analyzing trace with hash 240481230, now seen corresponding path program 24 times [2018-10-22 15:50:34,946 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:34,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:34,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:34,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:34,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 598 proven. 975 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-22 15:50:35,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:35,337 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:35,352 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:35,391 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-22 15:50:35,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:35,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 650 proven. 100 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2018-10-22 15:50:35,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:35,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11] total 37 [2018-10-22 15:50:35,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:50:35,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:50:35,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:50:35,670 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand 37 states. [2018-10-22 15:50:35,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:35,834 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2018-10-22 15:50:35,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-22 15:50:35,835 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 106 [2018-10-22 15:50:35,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:35,837 INFO L225 Difference]: With dead ends: 144 [2018-10-22 15:50:35,837 INFO L226 Difference]: Without dead ends: 114 [2018-10-22 15:50:35,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:50:35,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-22 15:50:35,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-10-22 15:50:35,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-22 15:50:35,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2018-10-22 15:50:35,841 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 106 [2018-10-22 15:50:35,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:35,842 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2018-10-22 15:50:35,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:50:35,842 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2018-10-22 15:50:35,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-22 15:50:35,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:35,843 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 26, 9, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:35,843 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:35,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:35,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1909709780, now seen corresponding path program 25 times [2018-10-22 15:50:35,844 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:35,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:35,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:35,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:35,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 702 proven. 1053 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-22 15:50:36,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:36,382 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:36,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:36,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 702 proven. 1053 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-22 15:50:36,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:36,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-22 15:50:36,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:50:36,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:50:36,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:50:36,460 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 29 states. [2018-10-22 15:50:36,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:36,627 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2018-10-22 15:50:36,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:50:36,627 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 112 [2018-10-22 15:50:36,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:36,628 INFO L225 Difference]: With dead ends: 149 [2018-10-22 15:50:36,629 INFO L226 Difference]: Without dead ends: 116 [2018-10-22 15:50:36,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:50:36,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-22 15:50:36,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-22 15:50:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-22 15:50:36,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2018-10-22 15:50:36,634 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 112 [2018-10-22 15:50:36,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:36,634 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2018-10-22 15:50:36,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:50:36,634 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2018-10-22 15:50:36,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-22 15:50:36,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:36,635 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 27, 9, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:36,635 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:36,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:36,636 INFO L82 PathProgramCache]: Analyzing trace with hash 658963599, now seen corresponding path program 26 times [2018-10-22 15:50:36,636 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:36,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:36,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:36,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:36,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:36,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 728 proven. 1134 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-22 15:50:37,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:37,440 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:37,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:37,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:37,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:37,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 728 proven. 1134 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-22 15:50:37,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:37,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-22 15:50:37,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-22 15:50:37,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-22 15:50:37,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:50:37,525 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand 30 states. [2018-10-22 15:50:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:37,766 INFO L93 Difference]: Finished difference Result 152 states and 171 transitions. [2018-10-22 15:50:37,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:50:37,767 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 115 [2018-10-22 15:50:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:37,768 INFO L225 Difference]: With dead ends: 152 [2018-10-22 15:50:37,768 INFO L226 Difference]: Without dead ends: 119 [2018-10-22 15:50:37,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:50:37,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-22 15:50:37,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-22 15:50:37,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-22 15:50:37,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 128 transitions. [2018-10-22 15:50:37,775 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 128 transitions. Word has length 115 [2018-10-22 15:50:37,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:37,775 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 128 transitions. [2018-10-22 15:50:37,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-22 15:50:37,775 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 128 transitions. [2018-10-22 15:50:37,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-22 15:50:37,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:37,776 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 28, 9, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:37,777 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:37,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:37,777 INFO L82 PathProgramCache]: Analyzing trace with hash 575284556, now seen corresponding path program 27 times [2018-10-22 15:50:37,777 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:37,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:37,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:37,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:37,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 754 proven. 1218 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-22 15:50:38,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:38,626 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:38,633 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:38,666 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-22 15:50:38,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:38,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 812 proven. 126 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2018-10-22 15:50:39,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:39,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2018-10-22 15:50:39,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:50:39,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:50:39,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:50:39,003 INFO L87 Difference]: Start difference. First operand 119 states and 128 transitions. Second operand 41 states. [2018-10-22 15:50:39,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:39,219 INFO L93 Difference]: Finished difference Result 159 states and 181 transitions. [2018-10-22 15:50:39,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-22 15:50:39,219 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 118 [2018-10-22 15:50:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:39,221 INFO L225 Difference]: With dead ends: 159 [2018-10-22 15:50:39,221 INFO L226 Difference]: Without dead ends: 126 [2018-10-22 15:50:39,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:50:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-22 15:50:39,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2018-10-22 15:50:39,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-22 15:50:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2018-10-22 15:50:39,227 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 118 [2018-10-22 15:50:39,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:39,227 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2018-10-22 15:50:39,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:50:39,227 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2018-10-22 15:50:39,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-22 15:50:39,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:39,228 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 29, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:39,228 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:39,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:39,229 INFO L82 PathProgramCache]: Analyzing trace with hash 647644782, now seen corresponding path program 28 times [2018-10-22 15:50:39,229 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:39,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:39,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:39,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:39,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 870 proven. 1305 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-22 15:50:39,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:39,698 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:39,706 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:39,735 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:39,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:39,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 870 proven. 1305 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-22 15:50:39,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:39,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-22 15:50:39,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 15:50:39,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 15:50:39,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:50:39,779 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand 32 states. [2018-10-22 15:50:39,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:39,933 INFO L93 Difference]: Finished difference Result 164 states and 185 transitions. [2018-10-22 15:50:39,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:50:39,934 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 124 [2018-10-22 15:50:39,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:39,935 INFO L225 Difference]: With dead ends: 164 [2018-10-22 15:50:39,935 INFO L226 Difference]: Without dead ends: 128 [2018-10-22 15:50:39,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:50:39,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-22 15:50:39,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-22 15:50:39,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-22 15:50:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2018-10-22 15:50:39,940 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 124 [2018-10-22 15:50:39,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:39,940 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2018-10-22 15:50:39,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 15:50:39,940 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2018-10-22 15:50:39,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-22 15:50:39,941 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:39,941 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 30, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:39,941 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:39,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:39,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1294163375, now seen corresponding path program 29 times [2018-10-22 15:50:39,942 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:39,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:39,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:39,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:39,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 899 proven. 1395 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-22 15:50:40,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:40,539 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:40,547 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:40,606 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2018-10-22 15:50:40,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:40,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 899 proven. 1395 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-22 15:50:40,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:40,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-22 15:50:40,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:50:40,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:50:40,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:50:40,657 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand 33 states. [2018-10-22 15:50:40,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:40,797 INFO L93 Difference]: Finished difference Result 167 states and 188 transitions. [2018-10-22 15:50:40,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-22 15:50:40,797 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 127 [2018-10-22 15:50:40,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:40,798 INFO L225 Difference]: With dead ends: 167 [2018-10-22 15:50:40,798 INFO L226 Difference]: Without dead ends: 131 [2018-10-22 15:50:40,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:50:40,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-22 15:50:40,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-22 15:50:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-22 15:50:40,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2018-10-22 15:50:40,804 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 127 [2018-10-22 15:50:40,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:40,804 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2018-10-22 15:50:40,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:50:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2018-10-22 15:50:40,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-22 15:50:40,805 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:40,805 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 31, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:40,806 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:40,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:40,806 INFO L82 PathProgramCache]: Analyzing trace with hash -786458738, now seen corresponding path program 30 times [2018-10-22 15:50:40,806 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:40,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:40,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:40,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:40,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 928 proven. 1488 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-22 15:50:41,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:41,325 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:41,333 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:41,392 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2018-10-22 15:50:41,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:41,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 992 proven. 155 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-22 15:50:41,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:41,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 13] total 45 [2018-10-22 15:50:41,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-22 15:50:41,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-22 15:50:41,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:50:41,749 INFO L87 Difference]: Start difference. First operand 131 states and 141 transitions. Second operand 45 states. [2018-10-22 15:50:42,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:42,023 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2018-10-22 15:50:42,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-22 15:50:42,023 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 130 [2018-10-22 15:50:42,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:42,025 INFO L225 Difference]: With dead ends: 174 [2018-10-22 15:50:42,025 INFO L226 Difference]: Without dead ends: 138 [2018-10-22 15:50:42,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:50:42,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-22 15:50:42,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-10-22 15:50:42,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-22 15:50:42,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2018-10-22 15:50:42,032 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 130 [2018-10-22 15:50:42,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:42,032 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2018-10-22 15:50:42,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-22 15:50:42,032 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2018-10-22 15:50:42,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-22 15:50:42,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:42,033 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 32, 11, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:42,033 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:42,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:42,034 INFO L82 PathProgramCache]: Analyzing trace with hash 568983916, now seen corresponding path program 31 times [2018-10-22 15:50:42,034 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:42,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:42,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:42,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:42,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 1056 proven. 1584 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-10-22 15:50:42,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:42,844 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:42,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:42,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 1056 proven. 1584 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-10-22 15:50:42,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:42,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-22 15:50:42,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:50:42,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:50:42,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:50:42,927 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 35 states. [2018-10-22 15:50:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:43,352 INFO L93 Difference]: Finished difference Result 179 states and 202 transitions. [2018-10-22 15:50:43,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:50:43,352 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 136 [2018-10-22 15:50:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:43,353 INFO L225 Difference]: With dead ends: 179 [2018-10-22 15:50:43,353 INFO L226 Difference]: Without dead ends: 140 [2018-10-22 15:50:43,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:50:43,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-22 15:50:43,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-22 15:50:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-22 15:50:43,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 151 transitions. [2018-10-22 15:50:43,359 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 151 transitions. Word has length 136 [2018-10-22 15:50:43,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:43,359 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 151 transitions. [2018-10-22 15:50:43,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:50:43,359 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 151 transitions. [2018-10-22 15:50:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-22 15:50:43,360 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:43,360 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 33, 11, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:43,361 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:43,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:43,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1823121615, now seen corresponding path program 32 times [2018-10-22 15:50:43,361 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:43,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:43,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:43,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:43,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 1088 proven. 1683 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-10-22 15:50:44,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:44,586 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:44,593 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:44,626 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:44,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:44,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 1088 proven. 1683 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-10-22 15:50:44,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:44,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-22 15:50:44,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 15:50:44,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 15:50:44,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:50:44,682 INFO L87 Difference]: Start difference. First operand 140 states and 151 transitions. Second operand 36 states. [2018-10-22 15:50:44,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:44,882 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2018-10-22 15:50:44,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-22 15:50:44,883 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 139 [2018-10-22 15:50:44,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:44,884 INFO L225 Difference]: With dead ends: 182 [2018-10-22 15:50:44,884 INFO L226 Difference]: Without dead ends: 143 [2018-10-22 15:50:44,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:50:44,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-22 15:50:44,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-22 15:50:44,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-22 15:50:44,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2018-10-22 15:50:44,892 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 139 [2018-10-22 15:50:44,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:44,893 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2018-10-22 15:50:44,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-22 15:50:44,893 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2018-10-22 15:50:44,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-22 15:50:44,894 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:44,894 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 34, 11, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:44,894 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:44,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:44,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1918804620, now seen corresponding path program 33 times [2018-10-22 15:50:44,895 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:44,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:44,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:44,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:44,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 1120 proven. 1785 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-10-22 15:50:45,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:45,526 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:45,533 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:45,562 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-22 15:50:45,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:45,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 1190 proven. 187 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2018-10-22 15:50:45,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:45,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2018-10-22 15:50:45,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-22 15:50:45,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-22 15:50:45,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:50:45,979 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand 49 states. [2018-10-22 15:50:46,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:46,466 INFO L93 Difference]: Finished difference Result 189 states and 215 transitions. [2018-10-22 15:50:46,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-22 15:50:46,467 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 142 [2018-10-22 15:50:46,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:46,468 INFO L225 Difference]: With dead ends: 189 [2018-10-22 15:50:46,468 INFO L226 Difference]: Without dead ends: 150 [2018-10-22 15:50:46,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:50:46,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-22 15:50:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2018-10-22 15:50:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-22 15:50:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 161 transitions. [2018-10-22 15:50:46,475 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 161 transitions. Word has length 142 [2018-10-22 15:50:46,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:46,475 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 161 transitions. [2018-10-22 15:50:46,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-22 15:50:46,476 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 161 transitions. [2018-10-22 15:50:46,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-22 15:50:46,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:46,476 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 35, 12, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:46,476 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:46,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:46,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1780491730, now seen corresponding path program 34 times [2018-10-22 15:50:46,477 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:46,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:46,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:46,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:46,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 1260 proven. 1890 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-22 15:50:47,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:47,071 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:47,080 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:47,130 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:47,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:47,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 1260 proven. 1890 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-22 15:50:47,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:47,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-22 15:50:47,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-22 15:50:47,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-22 15:50:47,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:50:47,195 INFO L87 Difference]: Start difference. First operand 149 states and 161 transitions. Second operand 38 states. [2018-10-22 15:50:47,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:47,490 INFO L93 Difference]: Finished difference Result 194 states and 219 transitions. [2018-10-22 15:50:47,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-22 15:50:47,490 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 148 [2018-10-22 15:50:47,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:47,492 INFO L225 Difference]: With dead ends: 194 [2018-10-22 15:50:47,492 INFO L226 Difference]: Without dead ends: 152 [2018-10-22 15:50:47,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:50:47,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-22 15:50:47,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-10-22 15:50:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-22 15:50:47,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2018-10-22 15:50:47,500 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 148 [2018-10-22 15:50:47,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:47,500 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2018-10-22 15:50:47,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-22 15:50:47,500 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2018-10-22 15:50:47,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-22 15:50:47,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:47,502 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 36, 12, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:47,502 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:47,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:47,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1582660881, now seen corresponding path program 35 times [2018-10-22 15:50:47,503 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:47,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:47,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:47,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 1295 proven. 1998 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-22 15:50:48,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:48,357 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:48,364 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:48,432 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-22 15:50:48,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:48,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 1295 proven. 1998 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-22 15:50:48,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:48,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-22 15:50:48,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-22 15:50:48,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-22 15:50:48,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:50:48,484 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand 39 states. [2018-10-22 15:50:48,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:48,678 INFO L93 Difference]: Finished difference Result 197 states and 222 transitions. [2018-10-22 15:50:48,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 15:50:48,679 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 151 [2018-10-22 15:50:48,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:48,680 INFO L225 Difference]: With dead ends: 197 [2018-10-22 15:50:48,681 INFO L226 Difference]: Without dead ends: 155 [2018-10-22 15:50:48,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:50:48,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-22 15:50:48,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-22 15:50:48,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-22 15:50:48,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 167 transitions. [2018-10-22 15:50:48,686 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 167 transitions. Word has length 151 [2018-10-22 15:50:48,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:48,686 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 167 transitions. [2018-10-22 15:50:48,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-22 15:50:48,687 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 167 transitions. [2018-10-22 15:50:48,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-22 15:50:48,687 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:48,688 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 37, 12, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:48,688 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:48,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:48,688 INFO L82 PathProgramCache]: Analyzing trace with hash 265014094, now seen corresponding path program 36 times [2018-10-22 15:50:48,688 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:48,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:48,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:48,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 1330 proven. 2109 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-22 15:50:49,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:49,862 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:49,869 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:50,092 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-10-22 15:50:50,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:50,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 1406 proven. 222 refuted. 0 times theorem prover too weak. 1998 trivial. 0 not checked. [2018-10-22 15:50:50,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:50,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 15] total 53 [2018-10-22 15:50:50,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-22 15:50:50,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-22 15:50:50,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-22 15:50:50,598 INFO L87 Difference]: Start difference. First operand 155 states and 167 transitions. Second operand 53 states. [2018-10-22 15:50:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:50,900 INFO L93 Difference]: Finished difference Result 204 states and 232 transitions. [2018-10-22 15:50:50,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-22 15:50:50,900 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 154 [2018-10-22 15:50:50,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:50,902 INFO L225 Difference]: With dead ends: 204 [2018-10-22 15:50:50,902 INFO L226 Difference]: Without dead ends: 162 [2018-10-22 15:50:50,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-22 15:50:50,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-22 15:50:50,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-10-22 15:50:50,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-22 15:50:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 174 transitions. [2018-10-22 15:50:50,909 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 174 transitions. Word has length 154 [2018-10-22 15:50:50,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:50,909 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 174 transitions. [2018-10-22 15:50:50,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-22 15:50:50,910 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 174 transitions. [2018-10-22 15:50:50,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-22 15:50:50,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:50,910 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 38, 13, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:50,911 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:50,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:50,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1764700500, now seen corresponding path program 37 times [2018-10-22 15:50:50,911 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:50,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:50,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:50,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 1482 proven. 2223 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:50:51,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:51,758 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:51,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:51,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 1482 proven. 2223 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:50:51,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:51,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-22 15:50:51,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:50:51,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:50:51,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:50:51,872 INFO L87 Difference]: Start difference. First operand 161 states and 174 transitions. Second operand 41 states. [2018-10-22 15:50:52,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:52,075 INFO L93 Difference]: Finished difference Result 209 states and 236 transitions. [2018-10-22 15:50:52,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-22 15:50:52,076 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 160 [2018-10-22 15:50:52,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:52,077 INFO L225 Difference]: With dead ends: 209 [2018-10-22 15:50:52,077 INFO L226 Difference]: Without dead ends: 164 [2018-10-22 15:50:52,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:50:52,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-22 15:50:52,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-10-22 15:50:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-22 15:50:52,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 177 transitions. [2018-10-22 15:50:52,083 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 177 transitions. Word has length 160 [2018-10-22 15:50:52,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:52,083 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 177 transitions. [2018-10-22 15:50:52,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:50:52,083 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 177 transitions. [2018-10-22 15:50:52,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-22 15:50:52,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:52,084 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 39, 13, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:52,085 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:52,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:52,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1072548593, now seen corresponding path program 38 times [2018-10-22 15:50:52,085 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:52,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:52,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:52,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:52,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 1520 proven. 2340 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:50:54,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:54,037 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:54,044 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:54,076 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:54,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:54,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 1520 proven. 2340 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:50:54,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:54,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-22 15:50:54,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-22 15:50:54,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-22 15:50:54,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:50:54,128 INFO L87 Difference]: Start difference. First operand 164 states and 177 transitions. Second operand 42 states. [2018-10-22 15:50:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:54,288 INFO L93 Difference]: Finished difference Result 212 states and 239 transitions. [2018-10-22 15:50:54,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-22 15:50:54,289 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 163 [2018-10-22 15:50:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:54,290 INFO L225 Difference]: With dead ends: 212 [2018-10-22 15:50:54,290 INFO L226 Difference]: Without dead ends: 167 [2018-10-22 15:50:54,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:50:54,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-22 15:50:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-22 15:50:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-22 15:50:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 180 transitions. [2018-10-22 15:50:54,296 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 180 transitions. Word has length 163 [2018-10-22 15:50:54,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:54,297 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 180 transitions. [2018-10-22 15:50:54,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-22 15:50:54,297 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 180 transitions. [2018-10-22 15:50:54,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-22 15:50:54,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:54,298 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 40, 13, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:54,298 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:54,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:54,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1313075252, now seen corresponding path program 39 times [2018-10-22 15:50:54,299 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:54,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:54,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:54,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 1558 proven. 2460 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:50:55,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:55,049 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:55,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:55,092 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-22 15:50:55,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:55,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 1640 proven. 260 refuted. 0 times theorem prover too weak. 2340 trivial. 0 not checked. [2018-10-22 15:50:56,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:56,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 16] total 57 [2018-10-22 15:50:56,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-22 15:50:56,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-22 15:50:56,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-22 15:50:56,831 INFO L87 Difference]: Start difference. First operand 167 states and 180 transitions. Second operand 57 states. [2018-10-22 15:50:57,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:57,109 INFO L93 Difference]: Finished difference Result 219 states and 249 transitions. [2018-10-22 15:50:57,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-22 15:50:57,110 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 166 [2018-10-22 15:50:57,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:57,111 INFO L225 Difference]: With dead ends: 219 [2018-10-22 15:50:57,111 INFO L226 Difference]: Without dead ends: 174 [2018-10-22 15:50:57,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-22 15:50:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-22 15:50:57,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2018-10-22 15:50:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-22 15:50:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 187 transitions. [2018-10-22 15:50:57,118 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 187 transitions. Word has length 166 [2018-10-22 15:50:57,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:57,118 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 187 transitions. [2018-10-22 15:50:57,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-22 15:50:57,118 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 187 transitions. [2018-10-22 15:50:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-22 15:50:57,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:57,119 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 41, 14, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:57,120 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:57,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:57,120 INFO L82 PathProgramCache]: Analyzing trace with hash -142901778, now seen corresponding path program 40 times [2018-10-22 15:50:57,120 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:57,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:57,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:57,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:57,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 1722 proven. 2583 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-10-22 15:50:58,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:58,368 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:58,377 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:58,415 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:58,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:58,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 1722 proven. 2583 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-10-22 15:50:58,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:58,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-22 15:50:58,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-22 15:50:58,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-22 15:50:58,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:50:58,487 INFO L87 Difference]: Start difference. First operand 173 states and 187 transitions. Second operand 44 states. [2018-10-22 15:50:59,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:59,985 INFO L93 Difference]: Finished difference Result 224 states and 253 transitions. [2018-10-22 15:50:59,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-22 15:50:59,986 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 172 [2018-10-22 15:50:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:59,987 INFO L225 Difference]: With dead ends: 224 [2018-10-22 15:50:59,987 INFO L226 Difference]: Without dead ends: 176 [2018-10-22 15:50:59,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:50:59,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-22 15:50:59,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-10-22 15:50:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-22 15:50:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 190 transitions. [2018-10-22 15:50:59,991 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 190 transitions. Word has length 172 [2018-10-22 15:50:59,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:59,991 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 190 transitions. [2018-10-22 15:50:59,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-22 15:50:59,991 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 190 transitions. [2018-10-22 15:50:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-22 15:50:59,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:59,992 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 42, 14, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:59,992 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:59,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:59,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1199609903, now seen corresponding path program 41 times [2018-10-22 15:50:59,993 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:59,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:59,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:59,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:59,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 1763 proven. 2709 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-10-22 15:51:01,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:01,175 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:01,182 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:01,265 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 57 check-sat command(s) [2018-10-22 15:51:01,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:01,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 1763 proven. 2709 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-10-22 15:51:01,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:01,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-22 15:51:01,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-22 15:51:01,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-22 15:51:01,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:51:01,327 INFO L87 Difference]: Start difference. First operand 176 states and 190 transitions. Second operand 45 states. [2018-10-22 15:51:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:01,511 INFO L93 Difference]: Finished difference Result 227 states and 256 transitions. [2018-10-22 15:51:01,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-22 15:51:01,511 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 175 [2018-10-22 15:51:01,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:01,513 INFO L225 Difference]: With dead ends: 227 [2018-10-22 15:51:01,513 INFO L226 Difference]: Without dead ends: 179 [2018-10-22 15:51:01,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:51:01,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-22 15:51:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-22 15:51:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-22 15:51:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 193 transitions. [2018-10-22 15:51:01,518 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 193 transitions. Word has length 175 [2018-10-22 15:51:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:01,519 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 193 transitions. [2018-10-22 15:51:01,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-22 15:51:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 193 transitions. [2018-10-22 15:51:01,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-22 15:51:01,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:01,520 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 43, 14, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:01,520 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:01,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:01,521 INFO L82 PathProgramCache]: Analyzing trace with hash 518917902, now seen corresponding path program 42 times [2018-10-22 15:51:01,521 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:01,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:01,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:01,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:01,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 1804 proven. 2838 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-10-22 15:51:02,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:02,384 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:02,393 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:02,466 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2018-10-22 15:51:02,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:02,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 1892 proven. 301 refuted. 0 times theorem prover too weak. 2709 trivial. 0 not checked. [2018-10-22 15:51:03,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:03,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 17] total 61 [2018-10-22 15:51:03,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-22 15:51:03,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-22 15:51:03,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-22 15:51:03,288 INFO L87 Difference]: Start difference. First operand 179 states and 193 transitions. Second operand 61 states. [2018-10-22 15:51:03,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:03,555 INFO L93 Difference]: Finished difference Result 234 states and 266 transitions. [2018-10-22 15:51:03,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-22 15:51:03,556 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 178 [2018-10-22 15:51:03,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:03,557 INFO L225 Difference]: With dead ends: 234 [2018-10-22 15:51:03,557 INFO L226 Difference]: Without dead ends: 186 [2018-10-22 15:51:03,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-22 15:51:03,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-22 15:51:03,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-10-22 15:51:03,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-22 15:51:03,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 200 transitions. [2018-10-22 15:51:03,561 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 200 transitions. Word has length 178 [2018-10-22 15:51:03,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:03,562 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 200 transitions. [2018-10-22 15:51:03,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-22 15:51:03,562 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 200 transitions. [2018-10-22 15:51:03,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-22 15:51:03,562 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:03,563 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 44, 15, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:03,563 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:03,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:03,563 INFO L82 PathProgramCache]: Analyzing trace with hash -523465748, now seen corresponding path program 43 times [2018-10-22 15:51:03,563 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:03,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:03,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:03,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:03,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 1980 proven. 2970 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-10-22 15:51:04,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:04,419 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:04,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:04,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 1980 proven. 2970 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-10-22 15:51:04,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:04,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-22 15:51:04,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-22 15:51:04,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-22 15:51:04,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:51:04,532 INFO L87 Difference]: Start difference. First operand 185 states and 200 transitions. Second operand 47 states. [2018-10-22 15:51:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:04,727 INFO L93 Difference]: Finished difference Result 239 states and 270 transitions. [2018-10-22 15:51:04,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-22 15:51:04,728 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 184 [2018-10-22 15:51:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:04,729 INFO L225 Difference]: With dead ends: 239 [2018-10-22 15:51:04,730 INFO L226 Difference]: Without dead ends: 188 [2018-10-22 15:51:04,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:51:04,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-10-22 15:51:04,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-10-22 15:51:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-10-22 15:51:04,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2018-10-22 15:51:04,734 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 184 [2018-10-22 15:51:04,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:04,734 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2018-10-22 15:51:04,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-22 15:51:04,735 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2018-10-22 15:51:04,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-22 15:51:04,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:04,735 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 45, 15, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:04,736 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:04,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:04,736 INFO L82 PathProgramCache]: Analyzing trace with hash -194397873, now seen corresponding path program 44 times [2018-10-22 15:51:04,736 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:04,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:04,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:04,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:04,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 2024 proven. 3105 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-10-22 15:51:05,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:05,984 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:05,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:06,037 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:06,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:06,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 2024 proven. 3105 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-10-22 15:51:06,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:06,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-22 15:51:06,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-22 15:51:06,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-22 15:51:06,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:51:06,115 INFO L87 Difference]: Start difference. First operand 188 states and 203 transitions. Second operand 48 states. [2018-10-22 15:51:06,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:06,465 INFO L93 Difference]: Finished difference Result 242 states and 273 transitions. [2018-10-22 15:51:06,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-22 15:51:06,465 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 187 [2018-10-22 15:51:06,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:06,466 INFO L225 Difference]: With dead ends: 242 [2018-10-22 15:51:06,466 INFO L226 Difference]: Without dead ends: 191 [2018-10-22 15:51:06,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:51:06,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-22 15:51:06,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-22 15:51:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-22 15:51:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 206 transitions. [2018-10-22 15:51:06,470 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 206 transitions. Word has length 187 [2018-10-22 15:51:06,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:06,470 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 206 transitions. [2018-10-22 15:51:06,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-22 15:51:06,470 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 206 transitions. [2018-10-22 15:51:06,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-22 15:51:06,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:06,471 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 46, 15, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:06,471 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:06,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:06,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1951296780, now seen corresponding path program 45 times [2018-10-22 15:51:06,472 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:06,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:06,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:06,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:06,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 2068 proven. 3243 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-10-22 15:51:07,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:07,412 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:07,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:07,593 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-22 15:51:07,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:07,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 2162 proven. 345 refuted. 0 times theorem prover too weak. 3105 trivial. 0 not checked. [2018-10-22 15:51:08,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:08,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 18] total 65 [2018-10-22 15:51:08,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-22 15:51:08,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-22 15:51:08,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-22 15:51:08,511 INFO L87 Difference]: Start difference. First operand 191 states and 206 transitions. Second operand 65 states. [2018-10-22 15:51:08,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:08,853 INFO L93 Difference]: Finished difference Result 249 states and 283 transitions. [2018-10-22 15:51:08,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-22 15:51:08,853 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 190 [2018-10-22 15:51:08,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:08,855 INFO L225 Difference]: With dead ends: 249 [2018-10-22 15:51:08,855 INFO L226 Difference]: Without dead ends: 198 [2018-10-22 15:51:08,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-22 15:51:08,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-22 15:51:08,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2018-10-22 15:51:08,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-22 15:51:08,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 213 transitions. [2018-10-22 15:51:08,860 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 213 transitions. Word has length 190 [2018-10-22 15:51:08,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:08,860 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 213 transitions. [2018-10-22 15:51:08,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-22 15:51:08,860 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 213 transitions. [2018-10-22 15:51:08,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-22 15:51:08,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:08,861 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 47, 16, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:08,861 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:08,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:08,861 INFO L82 PathProgramCache]: Analyzing trace with hash 553726382, now seen corresponding path program 46 times [2018-10-22 15:51:08,861 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:08,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:08,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:08,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:08,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 2256 proven. 3384 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-22 15:51:11,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:11,341 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:11,356 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:11,402 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:11,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:11,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 2256 proven. 3384 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-22 15:51:11,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:11,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-22 15:51:11,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-22 15:51:11,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-22 15:51:11,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:51:11,464 INFO L87 Difference]: Start difference. First operand 197 states and 213 transitions. Second operand 50 states. [2018-10-22 15:51:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:12,612 INFO L93 Difference]: Finished difference Result 254 states and 287 transitions. [2018-10-22 15:51:12,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-22 15:51:12,612 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 196 [2018-10-22 15:51:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:12,613 INFO L225 Difference]: With dead ends: 254 [2018-10-22 15:51:12,613 INFO L226 Difference]: Without dead ends: 200 [2018-10-22 15:51:12,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:51:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-10-22 15:51:12,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-10-22 15:51:12,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-22 15:51:12,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 216 transitions. [2018-10-22 15:51:12,620 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 216 transitions. Word has length 196 [2018-10-22 15:51:12,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:12,620 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 216 transitions. [2018-10-22 15:51:12,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-22 15:51:12,621 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 216 transitions. [2018-10-22 15:51:12,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-22 15:51:12,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:12,622 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 48, 16, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:12,622 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:12,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:12,623 INFO L82 PathProgramCache]: Analyzing trace with hash -168926575, now seen corresponding path program 47 times [2018-10-22 15:51:12,623 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:12,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:12,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:12,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:12,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 2303 proven. 3528 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-22 15:51:14,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:14,908 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:14,914 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:15,014 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2018-10-22 15:51:15,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:15,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 2303 proven. 3528 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-22 15:51:15,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:15,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-22 15:51:15,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-22 15:51:15,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-22 15:51:15,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:51:15,084 INFO L87 Difference]: Start difference. First operand 200 states and 216 transitions. Second operand 51 states. [2018-10-22 15:51:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:15,295 INFO L93 Difference]: Finished difference Result 257 states and 290 transitions. [2018-10-22 15:51:15,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-22 15:51:15,296 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 199 [2018-10-22 15:51:15,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:15,297 INFO L225 Difference]: With dead ends: 257 [2018-10-22 15:51:15,298 INFO L226 Difference]: Without dead ends: 203 [2018-10-22 15:51:15,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:51:15,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-22 15:51:15,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-22 15:51:15,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-22 15:51:15,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 219 transitions. [2018-10-22 15:51:15,303 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 219 transitions. Word has length 199 [2018-10-22 15:51:15,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:15,303 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 219 transitions. [2018-10-22 15:51:15,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-22 15:51:15,303 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 219 transitions. [2018-10-22 15:51:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-22 15:51:15,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:15,304 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 49, 16, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:15,305 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:15,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:15,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1947886286, now seen corresponding path program 48 times [2018-10-22 15:51:15,305 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:15,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:15,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:15,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:15,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 2350 proven. 3675 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-22 15:51:18,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:18,624 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:18,631 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:18,711 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2018-10-22 15:51:18,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:18,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 2450 proven. 392 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2018-10-22 15:51:19,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:19,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 19] total 69 [2018-10-22 15:51:19,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-22 15:51:19,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-22 15:51:19,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-22 15:51:19,691 INFO L87 Difference]: Start difference. First operand 203 states and 219 transitions. Second operand 69 states. [2018-10-22 15:51:20,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:20,126 INFO L93 Difference]: Finished difference Result 264 states and 300 transitions. [2018-10-22 15:51:20,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-22 15:51:20,127 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 202 [2018-10-22 15:51:20,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:20,129 INFO L225 Difference]: With dead ends: 264 [2018-10-22 15:51:20,129 INFO L226 Difference]: Without dead ends: 210 [2018-10-22 15:51:20,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-22 15:51:20,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-22 15:51:20,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2018-10-22 15:51:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-22 15:51:20,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 226 transitions. [2018-10-22 15:51:20,135 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 226 transitions. Word has length 202 [2018-10-22 15:51:20,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:20,135 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 226 transitions. [2018-10-22 15:51:20,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-22 15:51:20,135 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 226 transitions. [2018-10-22 15:51:20,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-22 15:51:20,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:20,137 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 50, 17, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:20,137 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:20,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:20,137 INFO L82 PathProgramCache]: Analyzing trace with hash 852048172, now seen corresponding path program 49 times [2018-10-22 15:51:20,137 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:20,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:20,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:20,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:20,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 2832 proven. 551 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-10-22 15:51:21,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:21,746 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:21,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:21,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:23,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:23,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 70] total 72 [2018-10-22 15:51:23,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-22 15:51:23,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-22 15:51:23,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-22 15:51:23,907 INFO L87 Difference]: Start difference. First operand 209 states and 226 transitions. Second operand 72 states. [2018-10-22 15:51:24,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:24,231 INFO L93 Difference]: Finished difference Result 223 states and 246 transitions. [2018-10-22 15:51:24,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-22 15:51:24,232 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 208 [2018-10-22 15:51:24,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:24,233 INFO L225 Difference]: With dead ends: 223 [2018-10-22 15:51:24,233 INFO L226 Difference]: Without dead ends: 219 [2018-10-22 15:51:24,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-22 15:51:24,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-22 15:51:24,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2018-10-22 15:51:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-10-22 15:51:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 238 transitions. [2018-10-22 15:51:24,239 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 238 transitions. Word has length 208 [2018-10-22 15:51:24,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:24,240 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 238 transitions. [2018-10-22 15:51:24,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-22 15:51:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 238 transitions. [2018-10-22 15:51:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-22 15:51:24,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:24,242 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 50, 20, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:24,242 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:24,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:24,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1868974513, now seen corresponding path program 50 times [2018-10-22 15:51:24,242 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:24,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:24,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:24,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:24,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 3264 proven. 737 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-10-22 15:51:25,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:25,624 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:25,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:25,682 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:25,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:25,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:27,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:27,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 73] total 75 [2018-10-22 15:51:27,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-22 15:51:27,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-22 15:51:27,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-22 15:51:27,872 INFO L87 Difference]: Start difference. First operand 218 states and 238 transitions. Second operand 75 states. [2018-10-22 15:51:28,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:28,358 INFO L93 Difference]: Finished difference Result 232 states and 258 transitions. [2018-10-22 15:51:28,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-22 15:51:28,358 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 217 [2018-10-22 15:51:28,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:28,360 INFO L225 Difference]: With dead ends: 232 [2018-10-22 15:51:28,360 INFO L226 Difference]: Without dead ends: 228 [2018-10-22 15:51:28,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2200 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-22 15:51:28,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-22 15:51:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2018-10-22 15:51:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-22 15:51:28,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 250 transitions. [2018-10-22 15:51:28,365 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 250 transitions. Word has length 217 [2018-10-22 15:51:28,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:28,365 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 250 transitions. [2018-10-22 15:51:28,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-22 15:51:28,365 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 250 transitions. [2018-10-22 15:51:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-22 15:51:28,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:28,366 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 50, 23, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:28,366 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:28,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:28,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1801257268, now seen corresponding path program 51 times [2018-10-22 15:51:28,367 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:28,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:28,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:28,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:28,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 3696 proven. 950 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-10-22 15:51:28,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:28,842 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:28,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:28,912 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-22 15:51:28,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:28,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 3550 proven. 805 refuted. 0 times theorem prover too weak. 3675 trivial. 0 not checked. [2018-10-22 15:51:28,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:28,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 28 [2018-10-22 15:51:28,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:51:28,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:51:28,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:51:28,977 INFO L87 Difference]: Start difference. First operand 227 states and 250 transitions. Second operand 28 states. [2018-10-22 15:51:29,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:29,112 INFO L93 Difference]: Finished difference Result 241 states and 270 transitions. [2018-10-22 15:51:29,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:51:29,113 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 226 [2018-10-22 15:51:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:29,115 INFO L225 Difference]: With dead ends: 241 [2018-10-22 15:51:29,115 INFO L226 Difference]: Without dead ends: 237 [2018-10-22 15:51:29,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:51:29,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-22 15:51:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2018-10-22 15:51:29,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-10-22 15:51:29,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 262 transitions. [2018-10-22 15:51:29,122 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 262 transitions. Word has length 226 [2018-10-22 15:51:29,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:29,122 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 262 transitions. [2018-10-22 15:51:29,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:51:29,122 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 262 transitions. [2018-10-22 15:51:29,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-22 15:51:29,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:29,124 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 50, 26, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:29,124 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:29,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:29,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1134614545, now seen corresponding path program 52 times [2018-10-22 15:51:29,124 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:29,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:29,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:29,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:29,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 4128 proven. 1190 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-10-22 15:51:30,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:30,011 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:30,018 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:30,081 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:30,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:30,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:31,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:31,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 79] total 81 [2018-10-22 15:51:31,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-22 15:51:31,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-22 15:51:31,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-22 15:51:31,473 INFO L87 Difference]: Start difference. First operand 236 states and 262 transitions. Second operand 81 states. [2018-10-22 15:51:31,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:31,972 INFO L93 Difference]: Finished difference Result 250 states and 282 transitions. [2018-10-22 15:51:31,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-22 15:51:31,973 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 235 [2018-10-22 15:51:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:31,974 INFO L225 Difference]: With dead ends: 250 [2018-10-22 15:51:31,974 INFO L226 Difference]: Without dead ends: 246 [2018-10-22 15:51:31,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-22 15:51:31,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-22 15:51:31,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2018-10-22 15:51:31,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-22 15:51:31,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 274 transitions. [2018-10-22 15:51:31,978 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 274 transitions. Word has length 235 [2018-10-22 15:51:31,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:31,979 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 274 transitions. [2018-10-22 15:51:31,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-22 15:51:31,979 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 274 transitions. [2018-10-22 15:51:31,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-22 15:51:31,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:31,980 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 50, 29, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:31,980 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:31,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:31,980 INFO L82 PathProgramCache]: Analyzing trace with hash 972201068, now seen corresponding path program 53 times [2018-10-22 15:51:31,980 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:31,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:31,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:31,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:31,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 4560 proven. 1457 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-10-22 15:51:32,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:32,532 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:32,539 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:32,685 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 80 check-sat command(s) [2018-10-22 15:51:32,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:32,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 4470 proven. 3626 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2018-10-22 15:51:33,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:33,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 52] total 52 [2018-10-22 15:51:33,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-22 15:51:33,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-22 15:51:33,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:51:33,564 INFO L87 Difference]: Start difference. First operand 245 states and 274 transitions. Second operand 52 states. [2018-10-22 15:51:33,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:33,884 INFO L93 Difference]: Finished difference Result 312 states and 382 transitions. [2018-10-22 15:51:33,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-22 15:51:33,884 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 244 [2018-10-22 15:51:33,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:33,886 INFO L225 Difference]: With dead ends: 312 [2018-10-22 15:51:33,886 INFO L226 Difference]: Without dead ends: 308 [2018-10-22 15:51:33,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:51:33,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-10-22 15:51:33,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2018-10-22 15:51:33,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-10-22 15:51:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 358 transitions. [2018-10-22 15:51:33,892 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 358 transitions. Word has length 244 [2018-10-22 15:51:33,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:33,893 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 358 transitions. [2018-10-22 15:51:33,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-22 15:51:33,893 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 358 transitions. [2018-10-22 15:51:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-10-22 15:51:33,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:33,895 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 50, 50, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:33,895 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:33,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:33,895 INFO L82 PathProgramCache]: Analyzing trace with hash -378887791, now seen corresponding path program 54 times [2018-10-22 15:51:33,895 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:33,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:33,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:33,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:33,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 11225 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-10-22 15:51:36,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:36,186 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:36,195 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:36,489 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 101 check-sat command(s) [2018-10-22 15:51:36,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:36,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 11225 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-10-22 15:51:36,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:36,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-22 15:51:36,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-22 15:51:36,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-22 15:51:36,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-22 15:51:36,905 INFO L87 Difference]: Start difference. First operand 308 states and 358 transitions. Second operand 54 states. [2018-10-22 15:51:39,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:39,380 INFO L93 Difference]: Finished difference Result 4289 states and 5664 transitions. [2018-10-22 15:51:39,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-22 15:51:39,381 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 307 [2018-10-22 15:51:39,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:39,397 INFO L225 Difference]: With dead ends: 4289 [2018-10-22 15:51:39,398 INFO L226 Difference]: Without dead ends: 4285 [2018-10-22 15:51:39,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 306 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:51:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2018-10-22 15:51:39,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 311. [2018-10-22 15:51:39,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-10-22 15:51:39,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 362 transitions. [2018-10-22 15:51:39,471 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 362 transitions. Word has length 307 [2018-10-22 15:51:39,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:39,472 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 362 transitions. [2018-10-22 15:51:39,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-22 15:51:39,472 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 362 transitions. [2018-10-22 15:51:39,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-22 15:51:39,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:39,474 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 51, 50, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:39,474 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:39,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:39,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1341702412, now seen corresponding path program 55 times [2018-10-22 15:51:39,475 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:39,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:39,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:39,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:39,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 11527 proven. 0 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-10-22 15:51:40,857 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:51:40,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2018-10-22 15:51:40,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-22 15:51:40,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-22 15:51:40,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:51:40,859 INFO L87 Difference]: Start difference. First operand 311 states and 362 transitions. Second operand 52 states. [2018-10-22 15:51:41,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:41,465 INFO L93 Difference]: Finished difference Result 460 states and 560 transitions. [2018-10-22 15:51:41,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-22 15:51:41,472 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 310 [2018-10-22 15:51:41,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:41,473 INFO L225 Difference]: With dead ends: 460 [2018-10-22 15:51:41,473 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 15:51:41,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:51:41,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 15:51:41,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 15:51:41,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 15:51:41,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 15:51:41,474 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 310 [2018-10-22 15:51:41,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:41,475 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 15:51:41,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-22 15:51:41,475 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 15:51:41,475 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 15:51:41,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 15:51:42,414 WARN L179 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 1832 DAG size of output: 407 [2018-10-22 15:51:45,113 WARN L179 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 407 DAG size of output: 357 [2018-10-22 15:51:45,119 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 15:51:45,119 INFO L425 ceAbstractionStarter]: For program point L13-1(lines 13 20) no Hoare annotation was computed. [2018-10-22 15:51:45,119 INFO L425 ceAbstractionStarter]: For program point L13-3(lines 13 20) no Hoare annotation was computed. [2018-10-22 15:51:45,119 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 15:51:45,119 INFO L425 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2018-10-22 15:51:45,119 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 15:51:45,119 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-10-22 15:51:45,119 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 15:51:45,119 INFO L428 ceAbstractionStarter]: At program point L22(lines 10 23) the Hoare annotation is: true [2018-10-22 15:51:45,120 INFO L425 ceAbstractionStarter]: For program point L14(lines 14 19) no Hoare annotation was computed. [2018-10-22 15:51:45,121 INFO L421 ceAbstractionStarter]: At program point L14-2(lines 13 20) the Hoare annotation is: (or (and (and (<= ULTIMATE.start_main_~y~0 72) (<= 72 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 72)) (<= 72 ULTIMATE.start_main_~x~0)) (and (<= 86 ULTIMATE.start_main_~x~0) (and (<= 86 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 86) (<= ULTIMATE.start_main_~y~0 86))) (and (and (<= 95 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 95) (<= ULTIMATE.start_main_~x~0 95)) (<= 95 ULTIMATE.start_main_~x~0)) (and (and (<= 76 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 76) (<= ULTIMATE.start_main_~y~0 76)) (<= 76 ULTIMATE.start_main_~x~0)) (and (<= 82 ULTIMATE.start_main_~x~0) (and (<= 82 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 82) (<= ULTIMATE.start_main_~x~0 82))) (and (and (<= ULTIMATE.start_main_~y~0 70) (<= ULTIMATE.start_main_~x~0 70) (<= 70 ULTIMATE.start_main_~y~0)) (<= 70 ULTIMATE.start_main_~x~0)) (and (<= 52 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 52) (<= 52 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 52))) (and (<= 87 ULTIMATE.start_main_~x~0) (and (<= 87 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 87) (<= ULTIMATE.start_main_~y~0 87))) (and (<= 81 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 81) (<= ULTIMATE.start_main_~x~0 81) (<= 81 ULTIMATE.start_main_~y~0))) (and (and (<= ULTIMATE.start_main_~y~0 98) (<= 98 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 98)) (<= 98 ULTIMATE.start_main_~x~0)) (and (<= 84 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 84) (<= 84 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 84))) (and (<= 85 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 85) (<= 85 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 85))) (and (and (<= 68 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 68) (<= ULTIMATE.start_main_~y~0 68)) (<= 68 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 91) (<= 91 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 91)) (<= 91 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 58) (<= ULTIMATE.start_main_~x~0 58) (<= 58 ULTIMATE.start_main_~y~0)) (<= 58 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 65) (<= ULTIMATE.start_main_~x~0 65) (<= 65 ULTIMATE.start_main_~y~0)) (<= 65 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 79) (<= 79 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 79)) (<= 79 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 88) (<= ULTIMATE.start_main_~x~0 88) (<= 88 ULTIMATE.start_main_~y~0)) (<= 88 ULTIMATE.start_main_~x~0)) (and (<= 99 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 99) (<= 99 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 99))) (and (<= 55 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 55) (<= 55 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 55))) (and (and (<= 93 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 93) (<= ULTIMATE.start_main_~y~0 93)) (<= 93 ULTIMATE.start_main_~x~0)) (and (<= 71 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 71) (<= ULTIMATE.start_main_~x~0 71) (<= 71 ULTIMATE.start_main_~y~0))) (and (<= 89 ULTIMATE.start_main_~x~0) (and (<= 89 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 89) (<= ULTIMATE.start_main_~y~0 89))) (and (<= 59 ULTIMATE.start_main_~x~0) (and (<= 59 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 59) (<= ULTIMATE.start_main_~x~0 59))) (and (and (<= 100 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 100)) (<= 100 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 50) (<= ULTIMATE.start_main_~y~0 50) (<= 50 ULTIMATE.start_main_~y~0)) (and (and (<= ULTIMATE.start_main_~x~0 78) (<= 78 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 78)) (<= 78 ULTIMATE.start_main_~x~0)) (and (<= 66 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 66) (<= ULTIMATE.start_main_~x~0 66) (<= 66 ULTIMATE.start_main_~y~0))) (and (<= 57 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~x~0 57) (<= ULTIMATE.start_main_~y~0 57) (<= 57 ULTIMATE.start_main_~y~0))) (and (and (<= ULTIMATE.start_main_~x~0 94) (<= ULTIMATE.start_main_~y~0 94) (<= 94 ULTIMATE.start_main_~y~0)) (<= 94 ULTIMATE.start_main_~x~0)) (and (<= 63 ULTIMATE.start_main_~x~0) (and (<= 63 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 63) (<= ULTIMATE.start_main_~x~0 63))) (and (and (<= 97 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 97) (<= ULTIMATE.start_main_~y~0 97)) (<= 97 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 74) (<= 74 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 74)) (<= 74 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 51) (<= ULTIMATE.start_main_~y~0 51) (<= 51 ULTIMATE.start_main_~y~0)) (<= 51 ULTIMATE.start_main_~x~0)) (and (and (<= 64 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 64) (<= ULTIMATE.start_main_~y~0 64)) (<= 64 ULTIMATE.start_main_~x~0)) (and (<= 73 ULTIMATE.start_main_~x~0) (and (<= 73 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 73) (<= ULTIMATE.start_main_~x~0 73))) (and (<= 67 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~x~0 67) (<= 67 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 67))) (and (<= 54 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 54) (<= 54 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 54))) (and (and (<= ULTIMATE.start_main_~y~0 69) (<= 69 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 69)) (<= 69 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 62) (<= ULTIMATE.start_main_~y~0 62) (<= 62 ULTIMATE.start_main_~y~0)) (<= 62 ULTIMATE.start_main_~x~0)) (and (and (<= 61 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 61) (<= ULTIMATE.start_main_~y~0 61)) (<= 61 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 53) (<= ULTIMATE.start_main_~y~0 53) (<= 53 ULTIMATE.start_main_~y~0)) (<= 53 ULTIMATE.start_main_~x~0)) (and (<= 60 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~x~0 60) (<= ULTIMATE.start_main_~y~0 60) (<= 60 ULTIMATE.start_main_~y~0))) (and (and (<= ULTIMATE.start_main_~y~0 75) (<= ULTIMATE.start_main_~x~0 75) (<= 75 ULTIMATE.start_main_~y~0)) (<= 75 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 90) (<= ULTIMATE.start_main_~y~0 90) (<= 90 ULTIMATE.start_main_~y~0)) (<= 90 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 96) (<= 96 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 96)) (<= 96 ULTIMATE.start_main_~x~0)) (and (and (<= 80 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 80) (<= ULTIMATE.start_main_~y~0 80)) (<= 80 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 83) (<= ULTIMATE.start_main_~y~0 83) (<= 83 ULTIMATE.start_main_~y~0)) (<= 83 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 56) (<= ULTIMATE.start_main_~x~0 56) (<= 56 ULTIMATE.start_main_~y~0)) (<= 56 ULTIMATE.start_main_~x~0)) (and (<= 77 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~x~0 77) (<= 77 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 77))) (and (<= 92 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 92) (<= ULTIMATE.start_main_~x~0 92) (<= 92 ULTIMATE.start_main_~y~0)))) [2018-10-22 15:51:45,121 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 15:51:45,121 INFO L428 ceAbstractionStarter]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2018-10-22 15:51:45,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:51:45 BoogieIcfgContainer [2018-10-22 15:51:45,160 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:51:45,161 INFO L168 Benchmark]: Toolchain (without parser) took 87386.30 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.3 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -340.6 MB). Peak memory consumption was 955.5 MB. Max. memory is 7.1 GB. [2018-10-22 15:51:45,162 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:51:45,162 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.90 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:51:45,163 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.74 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:51:45,163 INFO L168 Benchmark]: Boogie Preprocessor took 21.92 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:51:45,163 INFO L168 Benchmark]: RCFGBuilder took 357.82 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 782.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -824.5 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:51:45,164 INFO L168 Benchmark]: TraceAbstraction took 86718.24 ms. Allocated memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: 513.8 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 473.4 MB). Peak memory consumption was 987.2 MB. Max. memory is 7.1 GB. [2018-10-22 15:51:45,168 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.90 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 37.74 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.92 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 357.82 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 782.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -824.5 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 86718.24 ms. Allocated memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: 513.8 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 473.4 MB). Peak memory consumption was 987.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((y <= 72 && 72 <= y) && x <= 72) && 72 <= x) || (86 <= x && (86 <= y && x <= 86) && y <= 86)) || (((95 <= y && y <= 95) && x <= 95) && 95 <= x)) || (((76 <= y && x <= 76) && y <= 76) && 76 <= x)) || (82 <= x && (82 <= y && y <= 82) && x <= 82)) || (((y <= 70 && x <= 70) && 70 <= y) && 70 <= x)) || (52 <= x && (y <= 52 && 52 <= y) && x <= 52)) || (87 <= x && (87 <= y && x <= 87) && y <= 87)) || (81 <= x && (y <= 81 && x <= 81) && 81 <= y)) || (((y <= 98 && 98 <= y) && x <= 98) && 98 <= x)) || (84 <= x && (y <= 84 && 84 <= y) && x <= 84)) || (85 <= x && (y <= 85 && 85 <= y) && x <= 85)) || (((68 <= y && x <= 68) && y <= 68) && 68 <= x)) || (((y <= 91 && 91 <= y) && x <= 91) && 91 <= x)) || (((y <= 58 && x <= 58) && 58 <= y) && 58 <= x)) || (((y <= 65 && x <= 65) && 65 <= y) && 65 <= x)) || (((y <= 79 && 79 <= y) && x <= 79) && 79 <= x)) || (((y <= 88 && x <= 88) && 88 <= y) && 88 <= x)) || (99 <= x && (y <= 99 && 99 <= y) && x <= 99)) || (55 <= x && (y <= 55 && 55 <= y) && x <= 55)) || (((93 <= y && x <= 93) && y <= 93) && 93 <= x)) || (71 <= x && (y <= 71 && x <= 71) && 71 <= y)) || (89 <= x && (89 <= y && x <= 89) && y <= 89)) || (59 <= x && (59 <= y && y <= 59) && x <= 59)) || ((100 <= y && y <= 100) && 100 <= x)) || ((x <= 50 && y <= 50) && 50 <= y)) || (((x <= 78 && 78 <= y) && y <= 78) && 78 <= x)) || (66 <= x && (y <= 66 && x <= 66) && 66 <= y)) || (57 <= x && (x <= 57 && y <= 57) && 57 <= y)) || (((x <= 94 && y <= 94) && 94 <= y) && 94 <= x)) || (63 <= x && (63 <= y && y <= 63) && x <= 63)) || (((97 <= y && x <= 97) && y <= 97) && 97 <= x)) || (((x <= 74 && 74 <= y) && y <= 74) && 74 <= x)) || (((x <= 51 && y <= 51) && 51 <= y) && 51 <= x)) || (((64 <= y && x <= 64) && y <= 64) && 64 <= x)) || (73 <= x && (73 <= y && y <= 73) && x <= 73)) || (67 <= x && (x <= 67 && 67 <= y) && y <= 67)) || (54 <= x && (y <= 54 && 54 <= y) && x <= 54)) || (((y <= 69 && 69 <= y) && x <= 69) && 69 <= x)) || (((x <= 62 && y <= 62) && 62 <= y) && 62 <= x)) || (((61 <= y && x <= 61) && y <= 61) && 61 <= x)) || (((x <= 53 && y <= 53) && 53 <= y) && 53 <= x)) || (60 <= x && (x <= 60 && y <= 60) && 60 <= y)) || (((y <= 75 && x <= 75) && 75 <= y) && 75 <= x)) || (((x <= 90 && y <= 90) && 90 <= y) && 90 <= x)) || (((y <= 96 && 96 <= y) && x <= 96) && 96 <= x)) || (((80 <= y && x <= 80) && y <= 80) && 80 <= x)) || (((x <= 83 && y <= 83) && 83 <= y) && 83 <= x)) || (((y <= 56 && x <= 56) && 56 <= y) && 56 <= x)) || (77 <= x && (x <= 77 && 77 <= y) && y <= 77)) || (92 <= x && (y <= 92 && x <= 92) && 92 <= y) - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. SAFE Result, 86.6s OverallTime, 58 OverallIterations, 102 TraceHistogramMax, 17.4s AutomataDifference, 0.0s DeadEndRemovalTime, 3.6s HoareAnnotationTime, HoareTripleCheckerStatistics: 646 SDtfs, 948 SDslu, 13072 SDs, 0 SdLazy, 8243 SolverSat, 1931 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8248 GetRequests, 6417 SyntacticMatches, 2 SemanticMatches, 1829 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6900 ImplicationChecksByTransitivity, 55.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=311occurred in iteration=57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 58 MinimizatonAttempts, 3995 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 710 HoareAnnotationTreeSize, 3 FomulaSimplifications, 13400 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 3 FomulaSimplificationsInter, 200 FormulaSimplificationTreeSizeReductionInter, 2.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 58.5s InterpolantComputationTime, 13681 NumberOfCodeBlocks, 12883 NumberOfCodeBlocksAsserted, 965 NumberOfCheckSat, 13568 ConstructedInterpolants, 0 QuantifiedInterpolants, 5819482 SizeOfPredicates, 25 NumberOfNonLiveVariables, 11186 ConjunctsInSsa, 1456 ConjunctsInUnsatCore, 113 InterpolantComputations, 4 PerfectInterpolantSequences, 183380/343178 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...