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-new/gauss_sum_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:50:49,805 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:50:49,807 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:50:49,818 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:50:49,819 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:50:49,820 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:50:49,821 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:50:49,823 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:50:49,824 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:50:49,825 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:50:49,826 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:50:49,826 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:50:49,827 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:50:49,828 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:50:49,830 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:50:49,832 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:50:49,833 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:50:49,835 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:50:49,837 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:50:49,842 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:50:49,843 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:50:49,847 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:50:49,851 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:50:49,867 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 15:50:49,891 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:50:49,892 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:50:49,893 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:50:49,893 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:50:49,893 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:50:49,895 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:50:49,895 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:50:49,895 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:50:49,895 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:50:49,895 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:50:49,896 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:50:49,896 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:50:49,896 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:50:49,896 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:50:49,896 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:50:49,897 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:50:49,898 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:50:49,898 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:50:49,898 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:50:49,899 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:50:49,899 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:50:49,899 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:50:49,899 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:50:49,899 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:50:49,900 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:50:49,900 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:50:49,900 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:50:49,900 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:50:49,957 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:50:49,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:50:49,980 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:50:49,981 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:50:49,982 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:50:49,983 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call_true-termination.i [2018-10-22 15:50:50,041 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cf64f3982/efc2e441beae4df1b444c7cdec8ab1c6/FLAGe5a2c342a [2018-10-22 15:50:50,546 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:50:50,547 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call_true-termination.i [2018-10-22 15:50:50,552 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cf64f3982/efc2e441beae4df1b444c7cdec8ab1c6/FLAGe5a2c342a [2018-10-22 15:50:50,566 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cf64f3982/efc2e441beae4df1b444c7cdec8ab1c6 [2018-10-22 15:50:50,575 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:50:50,577 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:50:50,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:50:50,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:50:50,582 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:50:50,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:50:50" (1/1) ... [2018-10-22 15:50:50,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12d2b2b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:50, skipping insertion in model container [2018-10-22 15:50:50,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:50:50" (1/1) ... [2018-10-22 15:50:50,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:50:50,615 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:50:50,801 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:50:50,805 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:50:50,824 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:50:50,840 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:50:50,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:50 WrapperNode [2018-10-22 15:50:50,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:50:50,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:50:50,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:50:50,842 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:50:50,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:50" (1/1) ... [2018-10-22 15:50:50,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:50" (1/1) ... [2018-10-22 15:50:50,879 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:50:50,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:50:50,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:50:50,879 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:50:50,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:50" (1/1) ... [2018-10-22 15:50:50,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:50" (1/1) ... [2018-10-22 15:50:50,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:50" (1/1) ... [2018-10-22 15:50:50,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:50" (1/1) ... [2018-10-22 15:50:50,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:50" (1/1) ... [2018-10-22 15:50:50,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:50" (1/1) ... [2018-10-22 15:50:50,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:50" (1/1) ... [2018-10-22 15:50:50,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:50:50,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:50:50,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:50:50,901 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:50:50,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:50" (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 15:50:51,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:50:51,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:50:51,268 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:50:51,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:50:51 BoogieIcfgContainer [2018-10-22 15:50:51,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:50:51,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:50:51,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:50:51,273 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:50:51,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:50:50" (1/3) ... [2018-10-22 15:50:51,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa24ad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:50:51, skipping insertion in model container [2018-10-22 15:50:51,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:50" (2/3) ... [2018-10-22 15:50:51,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa24ad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:50:51, skipping insertion in model container [2018-10-22 15:50:51,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:50:51" (3/3) ... [2018-10-22 15:50:51,277 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum_true-unreach-call_true-termination.i [2018-10-22 15:50:51,286 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:50:51,294 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:50:51,311 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:50:51,343 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:50:51,344 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:50:51,344 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:50:51,344 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:50:51,345 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:50:51,345 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:50:51,345 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:50:51,345 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:50:51,345 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:50:51,359 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-10-22 15:50:51,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-22 15:50:51,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:51,367 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:51,369 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:51,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:51,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1807151048, now seen corresponding path program 1 times [2018-10-22 15:50:51,378 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:51,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:51,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:51,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:51,512 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 15:50:51,514 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:50:51,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:50:51,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:50:51,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:50:51,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:50:51,533 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2018-10-22 15:50:51,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:51,549 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2018-10-22 15:50:51,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:50:51,550 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2018-10-22 15:50:51,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:51,561 INFO L225 Difference]: With dead ends: 22 [2018-10-22 15:50:51,561 INFO L226 Difference]: Without dead ends: 10 [2018-10-22 15:50:51,565 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 15:50:51,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-22 15:50:51,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-22 15:50:51,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-22 15:50:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-22 15:50:51,602 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-10-22 15:50:51,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:51,602 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-22 15:50:51,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:50:51,603 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-22 15:50:51,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-22 15:50:51,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:51,603 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:51,604 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:51,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:51,604 INFO L82 PathProgramCache]: Analyzing trace with hash 178554705, now seen corresponding path program 1 times [2018-10-22 15:50:51,605 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:51,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:51,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:51,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,614 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:50:51,615 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:50:51,615 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:50:51,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:51,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:51,790 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 15:50:51,841 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:50:51,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:50:51,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:50:51,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:50:51,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:50:51,846 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 3 states. [2018-10-22 15:50:51,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:51,923 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-22 15:50:51,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:50:51,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-10-22 15:50:51,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:51,925 INFO L225 Difference]: With dead ends: 17 [2018-10-22 15:50:51,925 INFO L226 Difference]: Without dead ends: 13 [2018-10-22 15:50:51,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 15:50:51,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-22 15:50:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2018-10-22 15:50:51,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-22 15:50:51,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-22 15:50:51,929 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2018-10-22 15:50:51,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:51,930 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-22 15:50:51,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:50:51,930 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-22 15:50:51,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:50:51,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:51,931 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:51,932 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:51,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:51,932 INFO L82 PathProgramCache]: Analyzing trace with hash -494066964, now seen corresponding path program 1 times [2018-10-22 15:50:51,932 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:51,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:51,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:51,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,943 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:50:51,943 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:50:51,943 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:50:51,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:51,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:52,218 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 15:50:52,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:50:52,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-22 15:50:52,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:50:52,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:50:52,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:50:52,242 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2018-10-22 15:50:52,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:52,678 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-22 15:50:52,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:50:52,679 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-22 15:50:52,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:52,680 INFO L225 Difference]: With dead ends: 19 [2018-10-22 15:50:52,680 INFO L226 Difference]: Without dead ends: 15 [2018-10-22 15:50:52,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:50:52,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-22 15:50:52,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-22 15:50:52,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-22 15:50:52,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-22 15:50:52,684 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2018-10-22 15:50:52,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:52,685 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-22 15:50:52,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:50:52,685 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-22 15:50:52,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-22 15:50:52,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:52,686 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:52,686 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:52,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:52,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1751194993, now seen corresponding path program 2 times [2018-10-22 15:50:52,687 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:52,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:52,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:52,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:52,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:52,696 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:50:52,696 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:50:52,696 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:50:52,716 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:52,729 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:52,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:52,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:53,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:50:53,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-22 15:50:53,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:50:53,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:50:53,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:50:53,029 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2018-10-22 15:50:53,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:53,213 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-22 15:50:53,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:50:53,214 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2018-10-22 15:50:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:53,215 INFO L225 Difference]: With dead ends: 22 [2018-10-22 15:50:53,216 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 15:50:53,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:50:53,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 15:50:53,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-22 15:50:53,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 15:50:53,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-22 15:50:53,221 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2018-10-22 15:50:53,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:53,222 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-22 15:50:53,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:50:53,222 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-22 15:50:53,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 15:50:53,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:53,223 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:53,223 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:53,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:53,224 INFO L82 PathProgramCache]: Analyzing trace with hash 529488076, now seen corresponding path program 3 times [2018-10-22 15:50:53,224 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:53,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:53,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:53,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:53,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:53,234 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:50:53,235 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:50:53,235 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:50:53,243 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:53,257 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:50:53,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:53,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:53,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:50:53,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-22 15:50:53,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:50:53,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:50:53,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:50:53,906 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 11 states. [2018-10-22 15:50:54,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:54,078 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-22 15:50:54,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:50:54,081 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2018-10-22 15:50:54,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:54,082 INFO L225 Difference]: With dead ends: 25 [2018-10-22 15:50:54,082 INFO L226 Difference]: Without dead ends: 21 [2018-10-22 15:50:54,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:50:54,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-22 15:50:54,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-22 15:50:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-22 15:50:54,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-22 15:50:54,087 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2018-10-22 15:50:54,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:54,087 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-22 15:50:54,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:50:54,088 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-22 15:50:54,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-22 15:50:54,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:54,088 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:54,089 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:54,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:54,089 INFO L82 PathProgramCache]: Analyzing trace with hash 211590033, now seen corresponding path program 4 times [2018-10-22 15:50:54,090 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:54,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:54,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:54,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,100 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:50:54,101 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:50:54,101 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:50:54,139 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:54,182 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:54,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:54,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:54,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:50:54,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-22 15:50:54,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:50:54,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:50:54,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:50:54,493 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2018-10-22 15:50:54,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:54,821 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-22 15:50:54,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:50:54,824 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2018-10-22 15:50:54,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:54,825 INFO L225 Difference]: With dead ends: 28 [2018-10-22 15:50:54,825 INFO L226 Difference]: Without dead ends: 24 [2018-10-22 15:50:54,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:50:54,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-22 15:50:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-22 15:50:54,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-22 15:50:54,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-22 15:50:54,831 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 20 [2018-10-22 15:50:54,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:54,831 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-22 15:50:54,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:50:54,831 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-22 15:50:54,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-22 15:50:54,832 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:54,832 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:54,833 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:54,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:54,833 INFO L82 PathProgramCache]: Analyzing trace with hash 113878700, now seen corresponding path program 5 times [2018-10-22 15:50:54,833 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:54,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:54,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:54,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,846 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:50:54,846 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:50:54,847 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:50:54,864 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:54,884 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 15:50:54,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:54,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:55,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:50:55,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-22 15:50:55,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:50:55,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:50:55,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:50:55,174 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 15 states. [2018-10-22 15:50:55,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:55,423 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-22 15:50:55,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:50:55,424 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2018-10-22 15:50:55,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:55,425 INFO L225 Difference]: With dead ends: 31 [2018-10-22 15:50:55,425 INFO L226 Difference]: Without dead ends: 27 [2018-10-22 15:50:55,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:50:55,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-22 15:50:55,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-22 15:50:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-22 15:50:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-22 15:50:55,430 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2018-10-22 15:50:55,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:55,431 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-22 15:50:55,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:50:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-22 15:50:55,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-22 15:50:55,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:55,432 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:55,432 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:55,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:55,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1183383985, now seen corresponding path program 6 times [2018-10-22 15:50:55,433 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:55,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:55,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:55,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:55,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:55,444 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:50:55,444 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:50:55,445 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:50:55,462 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:55,484 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 15:50:55,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:55,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:55,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:50:55,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-22 15:50:55,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:50:55,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:50:55,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:50:55,891 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 17 states. [2018-10-22 15:50:56,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:56,518 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-22 15:50:56,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:50:56,519 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2018-10-22 15:50:56,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:56,520 INFO L225 Difference]: With dead ends: 34 [2018-10-22 15:50:56,520 INFO L226 Difference]: Without dead ends: 30 [2018-10-22 15:50:56,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:50:56,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-22 15:50:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-22 15:50:56,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-22 15:50:56,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-22 15:50:56,526 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2018-10-22 15:50:56,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:56,526 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-22 15:50:56,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:50:56,527 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-22 15:50:56,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-22 15:50:56,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:56,528 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:56,528 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:56,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:56,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1547039604, now seen corresponding path program 7 times [2018-10-22 15:50:56,529 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:56,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:56,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:56,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:56,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:56,540 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:50:56,540 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:50:56,540 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:50:56,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:56,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:57,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:50:57,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-22 15:50:57,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:50:57,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:50:57,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:50:57,102 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 19 states. [2018-10-22 15:50:57,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:57,534 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-22 15:50:57,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:50:57,535 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 29 [2018-10-22 15:50:57,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:57,536 INFO L225 Difference]: With dead ends: 37 [2018-10-22 15:50:57,536 INFO L226 Difference]: Without dead ends: 33 [2018-10-22 15:50:57,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:50:57,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-22 15:50:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-22 15:50:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-22 15:50:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-22 15:50:57,541 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 29 [2018-10-22 15:50:57,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:57,542 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-22 15:50:57,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:50:57,542 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-22 15:50:57,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-22 15:50:57,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:57,543 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:57,543 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:57,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:57,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1210560559, now seen corresponding path program 8 times [2018-10-22 15:50:57,544 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:57,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:57,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:57,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:57,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:57,558 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:50:57,558 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:50:57,558 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:50:57,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:57,586 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:57,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:57,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:58,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:50:58,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-22 15:50:58,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:50:58,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:50:58,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:50:58,195 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 21 states. [2018-10-22 15:50:58,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:58,664 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-22 15:50:58,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 15:50:58,665 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2018-10-22 15:50:58,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:58,665 INFO L225 Difference]: With dead ends: 40 [2018-10-22 15:50:58,666 INFO L226 Difference]: Without dead ends: 36 [2018-10-22 15:50:58,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:50:58,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-22 15:50:58,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-22 15:50:58,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-22 15:50:58,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-22 15:50:58,672 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 32 [2018-10-22 15:50:58,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:58,672 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-22 15:50:58,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:50:58,672 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-22 15:50:58,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-22 15:50:58,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:58,674 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:58,674 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:58,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:58,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1616999828, now seen corresponding path program 9 times [2018-10-22 15:50:58,674 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:58,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:58,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:58,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:58,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:58,686 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:50:58,686 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:50:58,686 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:50:58,701 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:58,724 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-22 15:50:58,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:58,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:59,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:50:59,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-22 15:50:59,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:50:59,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:50:59,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:50:59,418 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 23 states. [2018-10-22 15:50:59,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:59,857 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-22 15:50:59,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:50:59,857 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2018-10-22 15:50:59,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:59,859 INFO L225 Difference]: With dead ends: 43 [2018-10-22 15:50:59,859 INFO L226 Difference]: Without dead ends: 39 [2018-10-22 15:50:59,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:50:59,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-22 15:50:59,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-22 15:50:59,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-22 15:50:59,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-22 15:50:59,865 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 35 [2018-10-22 15:50:59,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:59,865 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-22 15:50:59,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:50:59,866 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-22 15:50:59,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-22 15:50:59,867 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:59,867 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:59,867 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:59,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:59,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1958512113, now seen corresponding path program 10 times [2018-10-22 15:50:59,867 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:59,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:59,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:59,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:59,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:59,879 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:50:59,879 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:50:59,880 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:50:59,896 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:59,922 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:59,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:59,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:00,414 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:00,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:00,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-22 15:51:00,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:51:00,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:51:00,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:51:00,446 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 25 states. [2018-10-22 15:51:00,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:00,983 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-22 15:51:00,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-22 15:51:00,983 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2018-10-22 15:51:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:00,985 INFO L225 Difference]: With dead ends: 46 [2018-10-22 15:51:00,986 INFO L226 Difference]: Without dead ends: 42 [2018-10-22 15:51:00,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:51:00,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-22 15:51:00,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-22 15:51:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-22 15:51:00,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-22 15:51:00,992 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 38 [2018-10-22 15:51:00,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:00,992 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-22 15:51:00,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:51:00,992 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-22 15:51:00,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-22 15:51:00,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:00,993 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:00,994 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:00,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:00,994 INFO L82 PathProgramCache]: Analyzing trace with hash 550838348, now seen corresponding path program 11 times [2018-10-22 15:51:00,994 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:00,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:00,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:00,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:00,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:01,007 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:01,007 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:01,008 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:01,017 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:01,039 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-22 15:51:01,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:01,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:01,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:01,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-22 15:51:01,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:51:01,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:51:01,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:51:01,708 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 27 states. [2018-10-22 15:51:02,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:02,868 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-22 15:51:02,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 15:51:02,870 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 41 [2018-10-22 15:51:02,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:02,871 INFO L225 Difference]: With dead ends: 49 [2018-10-22 15:51:02,871 INFO L226 Difference]: Without dead ends: 45 [2018-10-22 15:51:02,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=750, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:51:02,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-22 15:51:02,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-22 15:51:02,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-22 15:51:02,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-22 15:51:02,878 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 41 [2018-10-22 15:51:02,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:02,879 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-22 15:51:02,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:51:02,879 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-22 15:51:02,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-22 15:51:02,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:02,880 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:02,880 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:02,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:02,881 INFO L82 PathProgramCache]: Analyzing trace with hash 602383377, now seen corresponding path program 12 times [2018-10-22 15:51:02,881 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:02,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:02,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:02,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:02,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:02,893 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:02,894 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:02,894 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:02,903 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:02,935 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-22 15:51:02,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:02,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:04,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:04,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-22 15:51:04,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:51:04,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:51:04,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:51:04,602 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 29 states. [2018-10-22 15:51:05,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:05,375 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-22 15:51:05,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:51:05,376 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 44 [2018-10-22 15:51:05,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:05,377 INFO L225 Difference]: With dead ends: 52 [2018-10-22 15:51:05,378 INFO L226 Difference]: Without dead ends: 48 [2018-10-22 15:51:05,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=66, Invalid=864, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:51:05,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-22 15:51:05,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-22 15:51:05,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-22 15:51:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-22 15:51:05,384 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 44 [2018-10-22 15:51:05,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:05,384 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-22 15:51:05,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:51:05,385 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-22 15:51:05,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-22 15:51:05,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:05,386 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:05,386 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:05,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:05,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1417949652, now seen corresponding path program 13 times [2018-10-22 15:51:05,386 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:05,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:05,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:05,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:05,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:05,398 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:05,398 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:05,398 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:05,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:05,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:06,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:06,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-22 15:51:06,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:51:06,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:51:06,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:51:06,176 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 31 states. [2018-10-22 15:51:06,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:06,772 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-22 15:51:06,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:51:06,773 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 47 [2018-10-22 15:51:06,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:06,774 INFO L225 Difference]: With dead ends: 55 [2018-10-22 15:51:06,774 INFO L226 Difference]: Without dead ends: 51 [2018-10-22 15:51:06,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=986, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:51:06,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-22 15:51:06,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-22 15:51:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-22 15:51:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-22 15:51:06,787 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 47 [2018-10-22 15:51:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:06,788 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-22 15:51:06,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:51:06,788 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-22 15:51:06,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-22 15:51:06,789 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:06,789 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:06,790 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:06,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:06,790 INFO L82 PathProgramCache]: Analyzing trace with hash 512469553, now seen corresponding path program 14 times [2018-10-22 15:51:06,790 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:06,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:06,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:06,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:06,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:06,802 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:06,802 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:06,803 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:06,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:06,852 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:06,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:06,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:07,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:07,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-22 15:51:07,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:51:07,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:51:07,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:51:07,976 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 33 states. [2018-10-22 15:51:08,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:08,652 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-22 15:51:08,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-22 15:51:08,653 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 50 [2018-10-22 15:51:08,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:08,653 INFO L225 Difference]: With dead ends: 58 [2018-10-22 15:51:08,654 INFO L226 Difference]: Without dead ends: 54 [2018-10-22 15:51:08,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:51:08,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-22 15:51:08,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-22 15:51:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-22 15:51:08,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-22 15:51:08,660 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 50 [2018-10-22 15:51:08,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:08,661 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-22 15:51:08,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:51:08,661 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-22 15:51:08,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-22 15:51:08,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:08,662 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:08,662 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:08,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:08,662 INFO L82 PathProgramCache]: Analyzing trace with hash 18912268, now seen corresponding path program 15 times [2018-10-22 15:51:08,662 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:08,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:08,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:08,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:08,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:08,673 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:08,673 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:08,673 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:08,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:08,736 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-22 15:51:08,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:08,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:09,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:09,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-22 15:51:09,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:51:09,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:51:09,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:51:09,559 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 35 states. [2018-10-22 15:51:10,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:10,313 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-22 15:51:10,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:51:10,314 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 53 [2018-10-22 15:51:10,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:10,315 INFO L225 Difference]: With dead ends: 61 [2018-10-22 15:51:10,315 INFO L226 Difference]: Without dead ends: 57 [2018-10-22 15:51:10,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=1255, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:51:10,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-22 15:51:10,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-22 15:51:10,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-22 15:51:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-22 15:51:10,323 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 53 [2018-10-22 15:51:10,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:10,323 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-22 15:51:10,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:51:10,323 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-22 15:51:10,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-22 15:51:10,324 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:10,324 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:10,325 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:10,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:10,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1873110959, now seen corresponding path program 16 times [2018-10-22 15:51:10,325 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:10,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:10,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:10,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:10,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:10,336 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:10,336 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:10,336 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:10,362 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:10,391 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:10,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:10,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:11,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:11,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-22 15:51:11,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:51:11,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:51:11,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:51:11,201 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 37 states. [2018-10-22 15:51:12,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:12,096 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-22 15:51:12,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-22 15:51:12,096 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 56 [2018-10-22 15:51:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:12,097 INFO L225 Difference]: With dead ends: 64 [2018-10-22 15:51:12,097 INFO L226 Difference]: Without dead ends: 60 [2018-10-22 15:51:12,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=1400, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:51:12,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-22 15:51:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-22 15:51:12,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-22 15:51:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-22 15:51:12,102 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 56 [2018-10-22 15:51:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:12,103 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-22 15:51:12,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:51:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-22 15:51:12,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-22 15:51:12,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:12,104 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:12,104 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:12,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:12,104 INFO L82 PathProgramCache]: Analyzing trace with hash 13726188, now seen corresponding path program 17 times [2018-10-22 15:51:12,105 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:12,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:12,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:12,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:12,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:12,115 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:12,115 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:12,115 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:12,134 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:12,167 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-22 15:51:12,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:12,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:13,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:13,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-22 15:51:13,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-22 15:51:13,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-22 15:51:13,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:51:13,268 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 39 states. [2018-10-22 15:51:14,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:14,374 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-22 15:51:14,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 15:51:14,375 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 59 [2018-10-22 15:51:14,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:14,376 INFO L225 Difference]: With dead ends: 67 [2018-10-22 15:51:14,376 INFO L226 Difference]: Without dead ends: 63 [2018-10-22 15:51:14,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=86, Invalid=1554, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:51:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-22 15:51:14,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-22 15:51:14,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-22 15:51:14,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-22 15:51:14,384 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 59 [2018-10-22 15:51:14,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:14,384 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-22 15:51:14,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-22 15:51:14,385 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-22 15:51:14,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-22 15:51:14,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:14,386 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:14,386 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:14,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:14,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1752797583, now seen corresponding path program 18 times [2018-10-22 15:51:14,387 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:14,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:14,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:14,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:14,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:14,397 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:14,397 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:14,398 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:14,425 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:14,465 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-22 15:51:14,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:14,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:15,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:15,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-22 15:51:15,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:51:15,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:51:15,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:51:15,353 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 41 states. [2018-10-22 15:51:16,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:16,382 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-22 15:51:16,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-22 15:51:16,383 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 62 [2018-10-22 15:51:16,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:16,384 INFO L225 Difference]: With dead ends: 70 [2018-10-22 15:51:16,384 INFO L226 Difference]: Without dead ends: 66 [2018-10-22 15:51:16,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=1716, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:51:16,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-22 15:51:16,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-22 15:51:16,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-22 15:51:16,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-22 15:51:16,391 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 62 [2018-10-22 15:51:16,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:16,391 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-22 15:51:16,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:51:16,391 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-22 15:51:16,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-22 15:51:16,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:16,392 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:16,393 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:16,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:16,393 INFO L82 PathProgramCache]: Analyzing trace with hash -2028181556, now seen corresponding path program 19 times [2018-10-22 15:51:16,393 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:16,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:16,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:16,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:16,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:16,403 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:16,403 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:16,403 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:16,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:16,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:17,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:17,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-22 15:51:17,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:51:17,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:51:17,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:51:17,795 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 43 states. [2018-10-22 15:51:19,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:19,117 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-22 15:51:19,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-22 15:51:19,117 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 65 [2018-10-22 15:51:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:19,118 INFO L225 Difference]: With dead ends: 73 [2018-10-22 15:51:19,118 INFO L226 Difference]: Without dead ends: 69 [2018-10-22 15:51:19,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=94, Invalid=1886, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:51:19,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-22 15:51:19,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-22 15:51:19,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-22 15:51:19,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-22 15:51:19,125 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 65 [2018-10-22 15:51:19,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:19,126 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-22 15:51:19,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:51:19,126 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-22 15:51:19,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-22 15:51:19,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:19,127 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:19,127 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:19,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:19,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1690381457, now seen corresponding path program 20 times [2018-10-22 15:51:19,127 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:19,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:19,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:19,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:19,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:19,137 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:19,137 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:19,137 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:19,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:19,190 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:19,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:19,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:20,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:20,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-22 15:51:20,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-22 15:51:20,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-22 15:51:20,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:51:20,265 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 45 states. [2018-10-22 15:51:21,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:21,491 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-22 15:51:21,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-22 15:51:21,494 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 68 [2018-10-22 15:51:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:21,495 INFO L225 Difference]: With dead ends: 76 [2018-10-22 15:51:21,495 INFO L226 Difference]: Without dead ends: 72 [2018-10-22 15:51:21,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=98, Invalid=2064, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:51:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-22 15:51:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-22 15:51:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-22 15:51:21,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-22 15:51:21,500 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 68 [2018-10-22 15:51:21,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:21,500 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-22 15:51:21,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-22 15:51:21,500 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-22 15:51:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-22 15:51:21,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:21,501 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:21,501 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:21,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:21,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1309636012, now seen corresponding path program 21 times [2018-10-22 15:51:21,502 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:21,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:21,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:21,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:21,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:21,511 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:21,511 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:21,511 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:21,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:21,631 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-22 15:51:21,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:21,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:23,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:23,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-22 15:51:23,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-22 15:51:23,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-22 15:51:23,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:51:23,582 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 47 states. [2018-10-22 15:51:24,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:24,947 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-22 15:51:24,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-22 15:51:24,947 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 71 [2018-10-22 15:51:24,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:24,948 INFO L225 Difference]: With dead ends: 79 [2018-10-22 15:51:24,949 INFO L226 Difference]: Without dead ends: 75 [2018-10-22 15:51:24,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=101, Invalid=2251, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:51:24,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-22 15:51:24,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-22 15:51:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-22 15:51:24,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-22 15:51:24,955 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 71 [2018-10-22 15:51:24,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:24,956 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-22 15:51:24,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-22 15:51:24,956 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-22 15:51:24,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-22 15:51:24,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:24,957 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:24,957 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:24,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:24,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1530712753, now seen corresponding path program 22 times [2018-10-22 15:51:24,957 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:24,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:24,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:24,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:24,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:24,968 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:24,969 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:24,969 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:24,991 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:25,034 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:25,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:25,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:26,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:26,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-22 15:51:26,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-22 15:51:26,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-22 15:51:26,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:51:26,660 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 49 states. [2018-10-22 15:51:28,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:28,249 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-22 15:51:28,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-22 15:51:28,249 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 74 [2018-10-22 15:51:28,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:28,250 INFO L225 Difference]: With dead ends: 82 [2018-10-22 15:51:28,250 INFO L226 Difference]: Without dead ends: 78 [2018-10-22 15:51:28,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=106, Invalid=2444, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:51:28,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-22 15:51:28,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-22 15:51:28,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-22 15:51:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-22 15:51:28,255 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 74 [2018-10-22 15:51:28,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:28,256 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-22 15:51:28,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-22 15:51:28,256 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-22 15:51:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-22 15:51:28,256 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:28,256 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:28,257 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:28,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:28,257 INFO L82 PathProgramCache]: Analyzing trace with hash -851928180, now seen corresponding path program 23 times [2018-10-22 15:51:28,257 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:28,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:28,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:28,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:28,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:28,266 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:28,266 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:28,266 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:28,277 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:28,326 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-22 15:51:28,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:28,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:29,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:29,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-22 15:51:29,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-22 15:51:29,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-22 15:51:29,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:51:29,755 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 51 states. [2018-10-22 15:51:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:31,307 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-22 15:51:31,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-22 15:51:31,308 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 77 [2018-10-22 15:51:31,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:31,309 INFO L225 Difference]: With dead ends: 85 [2018-10-22 15:51:31,309 INFO L226 Difference]: Without dead ends: 81 [2018-10-22 15:51:31,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=110, Invalid=2646, Unknown=0, NotChecked=0, Total=2756 [2018-10-22 15:51:31,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-22 15:51:31,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-22 15:51:31,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-22 15:51:31,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-22 15:51:31,315 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 77 [2018-10-22 15:51:31,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:31,316 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-22 15:51:31,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-22 15:51:31,316 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-22 15:51:31,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-22 15:51:31,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:31,317 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:31,317 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:31,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:31,317 INFO L82 PathProgramCache]: Analyzing trace with hash 816537809, now seen corresponding path program 24 times [2018-10-22 15:51:31,317 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:31,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:31,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:31,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:31,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:31,326 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:31,326 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:31,326 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:31,342 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:31,407 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-22 15:51:31,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:31,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:34,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:34,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-22 15:51:34,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-22 15:51:34,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-22 15:51:34,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2018-10-22 15:51:34,087 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 53 states. [2018-10-22 15:51:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:35,757 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-22 15:51:35,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-22 15:51:35,758 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 80 [2018-10-22 15:51:35,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:35,759 INFO L225 Difference]: With dead ends: 88 [2018-10-22 15:51:35,759 INFO L226 Difference]: Without dead ends: 84 [2018-10-22 15:51:35,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=114, Invalid=2856, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:51:35,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-22 15:51:35,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-22 15:51:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-22 15:51:35,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-22 15:51:35,765 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 80 [2018-10-22 15:51:35,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:35,765 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-22 15:51:35,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-22 15:51:35,765 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-22 15:51:35,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-22 15:51:35,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:35,766 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:35,766 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:35,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:35,766 INFO L82 PathProgramCache]: Analyzing trace with hash 430299500, now seen corresponding path program 25 times [2018-10-22 15:51:35,766 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:35,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:35,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:35,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:35,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:35,774 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:35,774 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:35,774 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:35,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:35,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:37,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:37,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-22 15:51:37,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-22 15:51:37,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-22 15:51:37,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:51:37,356 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 55 states. [2018-10-22 15:51:39,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:39,308 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-22 15:51:39,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-22 15:51:39,308 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 83 [2018-10-22 15:51:39,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:39,309 INFO L225 Difference]: With dead ends: 91 [2018-10-22 15:51:39,310 INFO L226 Difference]: Without dead ends: 87 [2018-10-22 15:51:39,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=118, Invalid=3074, Unknown=0, NotChecked=0, Total=3192 [2018-10-22 15:51:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-22 15:51:39,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-22 15:51:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-22 15:51:39,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-22 15:51:39,316 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 83 [2018-10-22 15:51:39,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:39,317 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-22 15:51:39,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-22 15:51:39,317 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-22 15:51:39,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-22 15:51:39,317 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:39,318 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:39,318 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:39,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:39,318 INFO L82 PathProgramCache]: Analyzing trace with hash 222222065, now seen corresponding path program 26 times [2018-10-22 15:51:39,318 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:39,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:39,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:39,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:39,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:39,326 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:39,326 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:39,327 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:39,341 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:39,388 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:39,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:39,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:41,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:41,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-22 15:51:41,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-22 15:51:41,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-22 15:51:41,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2018-10-22 15:51:41,057 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 57 states. [2018-10-22 15:51:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:43,039 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-22 15:51:43,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-22 15:51:43,039 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 86 [2018-10-22 15:51:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:43,041 INFO L225 Difference]: With dead ends: 94 [2018-10-22 15:51:43,041 INFO L226 Difference]: Without dead ends: 90 [2018-10-22 15:51:43,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=122, Invalid=3300, Unknown=0, NotChecked=0, Total=3422 [2018-10-22 15:51:43,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-22 15:51:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-22 15:51:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-22 15:51:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-22 15:51:43,047 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 86 [2018-10-22 15:51:43,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:43,047 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-22 15:51:43,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-22 15:51:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-22 15:51:43,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-22 15:51:43,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:43,048 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:43,048 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:43,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:43,049 INFO L82 PathProgramCache]: Analyzing trace with hash -974835892, now seen corresponding path program 27 times [2018-10-22 15:51:43,049 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:43,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:43,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:43,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:43,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:43,057 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:43,058 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:43,058 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:43,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:43,283 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-22 15:51:43,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:43,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:45,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:45,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-10-22 15:51:45,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-22 15:51:45,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-22 15:51:45,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-22 15:51:45,509 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 59 states. [2018-10-22 15:51:47,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:47,623 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-22 15:51:47,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-22 15:51:47,623 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 89 [2018-10-22 15:51:47,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:47,624 INFO L225 Difference]: With dead ends: 97 [2018-10-22 15:51:47,625 INFO L226 Difference]: Without dead ends: 93 [2018-10-22 15:51:47,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=125, Invalid=3535, Unknown=0, NotChecked=0, Total=3660 [2018-10-22 15:51:47,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-22 15:51:47,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-22 15:51:47,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-22 15:51:47,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-22 15:51:47,630 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 89 [2018-10-22 15:51:47,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:47,631 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-22 15:51:47,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-22 15:51:47,631 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-22 15:51:47,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-22 15:51:47,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:47,632 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:47,632 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:47,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:47,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1414974191, now seen corresponding path program 28 times [2018-10-22 15:51:47,633 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:47,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:47,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:47,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:47,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:47,641 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:47,641 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:47,641 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:47,655 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:47,705 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:47,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:47,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:49,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:49,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-22 15:51:49,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-22 15:51:49,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-22 15:51:49,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2018-10-22 15:51:49,930 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 61 states. [2018-10-22 15:51:52,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:52,168 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-22 15:51:52,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-22 15:51:52,168 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 92 [2018-10-22 15:51:52,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:52,169 INFO L225 Difference]: With dead ends: 100 [2018-10-22 15:51:52,169 INFO L226 Difference]: Without dead ends: 96 [2018-10-22 15:51:52,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=130, Invalid=3776, Unknown=0, NotChecked=0, Total=3906 [2018-10-22 15:51:52,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-22 15:51:52,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-22 15:51:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-22 15:51:52,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-22 15:51:52,173 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 92 [2018-10-22 15:51:52,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:52,173 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-22 15:51:52,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-22 15:51:52,173 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-22 15:51:52,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-22 15:51:52,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:52,174 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:52,174 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:52,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:52,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1039885012, now seen corresponding path program 29 times [2018-10-22 15:51:52,175 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:52,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:52,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:52,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:52,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:52,182 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:52,182 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:52,183 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:52,197 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:52,278 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-22 15:51:52,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:52,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:54,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:54,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-10-22 15:51:54,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-22 15:51:54,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-22 15:51:54,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3782, Unknown=0, NotChecked=0, Total=3906 [2018-10-22 15:51:54,421 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 63 states. [2018-10-22 15:51:56,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:56,763 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-22 15:51:56,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-22 15:51:56,763 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 95 [2018-10-22 15:51:56,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:56,764 INFO L225 Difference]: With dead ends: 103 [2018-10-22 15:51:56,765 INFO L226 Difference]: Without dead ends: 99 [2018-10-22 15:51:56,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=134, Invalid=4026, Unknown=0, NotChecked=0, Total=4160 [2018-10-22 15:51:56,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-22 15:51:56,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-22 15:51:56,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-22 15:51:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-22 15:51:56,771 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 95 [2018-10-22 15:51:56,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:56,771 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-22 15:51:56,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-22 15:51:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-22 15:51:56,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-22 15:51:56,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:56,772 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:56,772 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:56,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:56,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2031909681, now seen corresponding path program 30 times [2018-10-22 15:51:56,772 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:56,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:56,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:56,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:56,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:56,780 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:51:56,780 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:51:56,780 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:51:56,790 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:56,906 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-22 15:51:56,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:56,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:59,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:51:59,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-22 15:51:59,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-22 15:51:59,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-22 15:51:59,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2018-10-22 15:51:59,395 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 65 states. [2018-10-22 15:52:01,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:01,881 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-22 15:52:01,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-22 15:52:01,882 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 98 [2018-10-22 15:52:01,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:01,883 INFO L225 Difference]: With dead ends: 106 [2018-10-22 15:52:01,884 INFO L226 Difference]: Without dead ends: 102 [2018-10-22 15:52:01,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=138, Invalid=4284, Unknown=0, NotChecked=0, Total=4422 [2018-10-22 15:52:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-22 15:52:01,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-22 15:52:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-22 15:52:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-22 15:52:01,890 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 98 [2018-10-22 15:52:01,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:01,890 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-22 15:52:01,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-22 15:52:01,890 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-22 15:52:01,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-22 15:52:01,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:01,891 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:01,891 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:01,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:01,892 INFO L82 PathProgramCache]: Analyzing trace with hash 999432972, now seen corresponding path program 31 times [2018-10-22 15:52:01,892 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:01,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:01,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:01,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:01,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:01,900 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:52:01,900 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:52:01,900 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:52:01,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:01,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:05,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:52:05,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-10-22 15:52:05,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-22 15:52:05,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-22 15:52:05,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2018-10-22 15:52:05,348 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 67 states. [2018-10-22 15:52:07,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:07,986 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-22 15:52:07,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-22 15:52:07,987 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 101 [2018-10-22 15:52:07,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:07,988 INFO L225 Difference]: With dead ends: 109 [2018-10-22 15:52:07,988 INFO L226 Difference]: Without dead ends: 105 [2018-10-22 15:52:07,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=142, Invalid=4550, Unknown=0, NotChecked=0, Total=4692 [2018-10-22 15:52:07,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-22 15:52:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-22 15:52:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-22 15:52:07,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-22 15:52:07,996 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 101 [2018-10-22 15:52:07,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:07,996 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-22 15:52:07,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-22 15:52:07,996 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-22 15:52:07,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-22 15:52:07,997 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:07,997 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:07,997 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:07,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:07,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1253398191, now seen corresponding path program 32 times [2018-10-22 15:52:07,998 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:07,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:07,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:07,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:07,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:08,006 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:52:08,006 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:52:08,006 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 (exit command is (exit), workingDir is null) [2018-10-22 15:52:08,022 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:52:08,086 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:52:08,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:08,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:10,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:52:10,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-10-22 15:52:10,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-22 15:52:10,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-22 15:52:10,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4556, Unknown=0, NotChecked=0, Total=4692 [2018-10-22 15:52:10,695 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 69 states. [2018-10-22 15:52:13,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:13,568 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-22 15:52:13,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-22 15:52:13,569 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 104 [2018-10-22 15:52:13,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:13,570 INFO L225 Difference]: With dead ends: 112 [2018-10-22 15:52:13,570 INFO L226 Difference]: Without dead ends: 108 [2018-10-22 15:52:13,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=146, Invalid=4824, Unknown=0, NotChecked=0, Total=4970 [2018-10-22 15:52:13,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-22 15:52:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-22 15:52:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-22 15:52:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-22 15:52:13,575 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 104 [2018-10-22 15:52:13,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:13,575 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-22 15:52:13,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-22 15:52:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-22 15:52:13,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-22 15:52:13,576 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:13,576 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:13,576 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:13,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:13,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2107359468, now seen corresponding path program 33 times [2018-10-22 15:52:13,577 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:13,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:13,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:13,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:13,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:13,584 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:52:13,584 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:52:13,584 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:52:13,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:52:13,997 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-22 15:52:13,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:14,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:16,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:52:16,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-10-22 15:52:16,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-22 15:52:16,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-22 15:52:16,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-10-22 15:52:16,961 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 71 states. [2018-10-22 15:52:20,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:20,146 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-22 15:52:20,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-22 15:52:20,147 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 107 [2018-10-22 15:52:20,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:20,148 INFO L225 Difference]: With dead ends: 115 [2018-10-22 15:52:20,148 INFO L226 Difference]: Without dead ends: 111 [2018-10-22 15:52:20,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=149, Invalid=5107, Unknown=0, NotChecked=0, Total=5256 [2018-10-22 15:52:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-22 15:52:20,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-22 15:52:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-22 15:52:20,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-22 15:52:20,153 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 107 [2018-10-22 15:52:20,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:20,153 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-22 15:52:20,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-22 15:52:20,153 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-22 15:52:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-22 15:52:20,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:20,154 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:20,154 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:20,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:20,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1838825615, now seen corresponding path program 34 times [2018-10-22 15:52:20,154 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:20,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:20,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:20,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:20,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:20,162 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:52:20,162 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:52:20,162 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:52:20,173 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:52:20,250 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:52:20,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:20,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:23,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:52:23,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-10-22 15:52:23,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-22 15:52:23,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-22 15:52:23,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=5112, Unknown=0, NotChecked=0, Total=5256 [2018-10-22 15:52:23,430 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 73 states. [2018-10-22 15:52:26,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:26,782 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-10-22 15:52:26,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-22 15:52:26,782 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 110 [2018-10-22 15:52:26,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:26,783 INFO L225 Difference]: With dead ends: 118 [2018-10-22 15:52:26,783 INFO L226 Difference]: Without dead ends: 114 [2018-10-22 15:52:26,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=154, Invalid=5396, Unknown=0, NotChecked=0, Total=5550 [2018-10-22 15:52:26,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-22 15:52:26,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-22 15:52:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-22 15:52:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-22 15:52:26,790 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 110 [2018-10-22 15:52:26,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:26,790 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-22 15:52:26,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-22 15:52:26,790 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-22 15:52:26,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-22 15:52:26,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:26,791 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:26,791 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:26,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:26,792 INFO L82 PathProgramCache]: Analyzing trace with hash -793807156, now seen corresponding path program 35 times [2018-10-22 15:52:26,792 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:26,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:26,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:26,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:26,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:26,800 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:52:26,801 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:52:26,801 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:52:26,813 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:52:26,913 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-22 15:52:26,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:26,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:29,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:52:29,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-10-22 15:52:29,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-22 15:52:29,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-22 15:52:29,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5402, Unknown=0, NotChecked=0, Total=5550 [2018-10-22 15:52:29,931 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 75 states. [2018-10-22 15:52:33,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:33,017 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-22 15:52:33,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-22 15:52:33,018 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 113 [2018-10-22 15:52:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:33,019 INFO L225 Difference]: With dead ends: 121 [2018-10-22 15:52:33,019 INFO L226 Difference]: Without dead ends: 117 [2018-10-22 15:52:33,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=158, Invalid=5694, Unknown=0, NotChecked=0, Total=5852 [2018-10-22 15:52:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-22 15:52:33,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-22 15:52:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-22 15:52:33,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-22 15:52:33,024 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 113 [2018-10-22 15:52:33,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:33,024 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-22 15:52:33,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-22 15:52:33,025 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-22 15:52:33,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-22 15:52:33,025 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:33,025 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:33,026 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:33,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:33,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1428143505, now seen corresponding path program 36 times [2018-10-22 15:52:33,026 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:33,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:33,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:33,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:33,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:33,033 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:52:33,033 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:52:33,033 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:52:33,045 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:52:33,171 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-22 15:52:33,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:33,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:36,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:52:36,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-10-22 15:52:36,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-22 15:52:36,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-22 15:52:36,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5700, Unknown=0, NotChecked=0, Total=5852 [2018-10-22 15:52:36,267 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 77 states. [2018-10-22 15:52:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:39,540 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-10-22 15:52:39,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-22 15:52:39,541 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 116 [2018-10-22 15:52:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:39,542 INFO L225 Difference]: With dead ends: 124 [2018-10-22 15:52:39,542 INFO L226 Difference]: Without dead ends: 120 [2018-10-22 15:52:39,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=162, Invalid=6000, Unknown=0, NotChecked=0, Total=6162 [2018-10-22 15:52:39,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-22 15:52:39,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-22 15:52:39,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-22 15:52:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-10-22 15:52:39,549 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 116 [2018-10-22 15:52:39,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:39,549 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-10-22 15:52:39,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-22 15:52:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-10-22 15:52:39,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-22 15:52:39,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:39,550 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:39,550 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:39,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:39,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1524319404, now seen corresponding path program 37 times [2018-10-22 15:52:39,551 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:39,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:39,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:39,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:39,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:39,559 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:52:39,559 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:52:39,559 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:52:39,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:39,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:42,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:52:42,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-10-22 15:52:42,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-22 15:52:42,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-22 15:52:42,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=6006, Unknown=0, NotChecked=0, Total=6162 [2018-10-22 15:52:42,900 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 79 states. [2018-10-22 15:52:46,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:46,530 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-22 15:52:46,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-22 15:52:46,530 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 119 [2018-10-22 15:52:46,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:46,532 INFO L225 Difference]: With dead ends: 127 [2018-10-22 15:52:46,532 INFO L226 Difference]: Without dead ends: 123 [2018-10-22 15:52:46,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=166, Invalid=6314, Unknown=0, NotChecked=0, Total=6480 [2018-10-22 15:52:46,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-22 15:52:46,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-22 15:52:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-22 15:52:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-22 15:52:46,539 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 119 [2018-10-22 15:52:46,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:46,539 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-22 15:52:46,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-22 15:52:46,539 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-22 15:52:46,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-22 15:52:46,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:46,540 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:46,540 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:46,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:46,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1957340081, now seen corresponding path program 38 times [2018-10-22 15:52:46,541 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:46,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:46,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:46,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:46,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:46,550 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:52:46,550 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:52:46,550 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:52:46,567 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:52:46,650 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:52:46,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:46,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:50,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:52:50,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-10-22 15:52:50,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-22 15:52:50,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-22 15:52:50,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=6320, Unknown=0, NotChecked=0, Total=6480 [2018-10-22 15:52:50,162 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 81 states. [2018-10-22 15:52:55,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:55,074 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-10-22 15:52:55,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-22 15:52:55,075 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 122 [2018-10-22 15:52:55,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:55,076 INFO L225 Difference]: With dead ends: 130 [2018-10-22 15:52:55,076 INFO L226 Difference]: Without dead ends: 126 [2018-10-22 15:52:55,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=170, Invalid=6636, Unknown=0, NotChecked=0, Total=6806 [2018-10-22 15:52:55,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-22 15:52:55,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-22 15:52:55,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-22 15:52:55,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-10-22 15:52:55,081 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 122 [2018-10-22 15:52:55,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:55,081 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-10-22 15:52:55,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-22 15:52:55,081 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-10-22 15:52:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-22 15:52:55,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:55,082 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:55,082 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:55,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:55,083 INFO L82 PathProgramCache]: Analyzing trace with hash -5428596, now seen corresponding path program 39 times [2018-10-22 15:52:55,083 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:55,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:55,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:55,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:55,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:55,090 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:52:55,090 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:52:55,090 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:52:55,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:52:56,064 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-22 15:52:56,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:56,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:59,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:52:59,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-10-22 15:52:59,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-22 15:52:59,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-22 15:52:59,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-10-22 15:52:59,654 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 83 states. [2018-10-22 15:53:03,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:03,674 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-22 15:53:03,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-22 15:53:03,674 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 125 [2018-10-22 15:53:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:03,676 INFO L225 Difference]: With dead ends: 133 [2018-10-22 15:53:03,676 INFO L226 Difference]: Without dead ends: 129 [2018-10-22 15:53:03,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=173, Invalid=6967, Unknown=0, NotChecked=0, Total=7140 [2018-10-22 15:53:03,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-22 15:53:03,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-22 15:53:03,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-22 15:53:03,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-22 15:53:03,682 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 125 [2018-10-22 15:53:03,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:03,682 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-22 15:53:03,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-22 15:53:03,682 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-22 15:53:03,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-22 15:53:03,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:03,683 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:03,683 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:03,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:03,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1162317359, now seen corresponding path program 40 times [2018-10-22 15:53:03,684 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:03,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:03,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:03,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:03,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:03,692 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:53:03,692 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:53:03,692 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:53:03,707 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:53:03,784 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:53:03,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:03,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:07,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:53:07,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-10-22 15:53:07,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-22 15:53:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-22 15:53:07,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=6972, Unknown=0, NotChecked=0, Total=7140 [2018-10-22 15:53:07,365 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 85 states. [2018-10-22 15:53:11,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:11,445 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-10-22 15:53:11,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-22 15:53:11,446 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 128 [2018-10-22 15:53:11,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:11,447 INFO L225 Difference]: With dead ends: 136 [2018-10-22 15:53:11,447 INFO L226 Difference]: Without dead ends: 132 [2018-10-22 15:53:11,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=178, Invalid=7304, Unknown=0, NotChecked=0, Total=7482 [2018-10-22 15:53:11,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-22 15:53:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-22 15:53:11,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-22 15:53:11,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-10-22 15:53:11,453 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 128 [2018-10-22 15:53:11,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:11,454 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-10-22 15:53:11,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-22 15:53:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-10-22 15:53:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-22 15:53:11,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:11,455 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:11,455 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:11,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:11,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1077094508, now seen corresponding path program 41 times [2018-10-22 15:53:11,455 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:11,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:11,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:11,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:11,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:11,464 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:53:11,464 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:53:11,465 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:53:11,484 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:53:11,631 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-22 15:53:11,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:11,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:15,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:53:15,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-10-22 15:53:15,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-22 15:53:15,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-22 15:53:15,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=7310, Unknown=0, NotChecked=0, Total=7482 [2018-10-22 15:53:15,891 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 87 states. [2018-10-22 15:53:20,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:20,042 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-22 15:53:20,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-22 15:53:20,042 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 131 [2018-10-22 15:53:20,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:20,044 INFO L225 Difference]: With dead ends: 139 [2018-10-22 15:53:20,044 INFO L226 Difference]: Without dead ends: 135 [2018-10-22 15:53:20,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=182, Invalid=7650, Unknown=0, NotChecked=0, Total=7832 [2018-10-22 15:53:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-22 15:53:20,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-22 15:53:20,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-22 15:53:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-22 15:53:20,050 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 131 [2018-10-22 15:53:20,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:20,051 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-22 15:53:20,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-22 15:53:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-22 15:53:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-22 15:53:20,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:20,052 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:20,052 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:20,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:20,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1669015537, now seen corresponding path program 42 times [2018-10-22 15:53:20,052 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:20,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:20,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:20,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:20,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:20,060 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:53:20,060 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:53:20,060 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:53:20,075 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:53:20,257 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-22 15:53:20,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:20,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:24,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:53:24,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-10-22 15:53:24,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-22 15:53:24,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-22 15:53:24,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=7656, Unknown=0, NotChecked=0, Total=7832 [2018-10-22 15:53:24,771 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 89 states. [2018-10-22 15:53:29,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:29,074 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-10-22 15:53:29,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-22 15:53:29,075 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 134 [2018-10-22 15:53:29,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:29,076 INFO L225 Difference]: With dead ends: 142 [2018-10-22 15:53:29,076 INFO L226 Difference]: Without dead ends: 138 [2018-10-22 15:53:29,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=186, Invalid=8004, Unknown=0, NotChecked=0, Total=8190 [2018-10-22 15:53:29,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-22 15:53:29,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-22 15:53:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-22 15:53:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-22 15:53:29,082 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 134 [2018-10-22 15:53:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:29,082 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-22 15:53:29,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-22 15:53:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-22 15:53:29,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-22 15:53:29,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:29,083 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:29,083 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:29,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:29,083 INFO L82 PathProgramCache]: Analyzing trace with hash 452673100, now seen corresponding path program 43 times [2018-10-22 15:53:29,084 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:29,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:29,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:29,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:29,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:29,092 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:53:29,093 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:53:29,093 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 (exit command is (exit), workingDir is null) [2018-10-22 15:53:29,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:53:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:29,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:33,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:53:33,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-10-22 15:53:33,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-22 15:53:33,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-22 15:53:33,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=8010, Unknown=0, NotChecked=0, Total=8190 [2018-10-22 15:53:33,012 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 91 states. [2018-10-22 15:53:37,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:37,580 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-22 15:53:37,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-22 15:53:37,581 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 137 [2018-10-22 15:53:37,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:37,582 INFO L225 Difference]: With dead ends: 145 [2018-10-22 15:53:37,582 INFO L226 Difference]: Without dead ends: 141 [2018-10-22 15:53:37,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=190, Invalid=8366, Unknown=0, NotChecked=0, Total=8556 [2018-10-22 15:53:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-22 15:53:37,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-22 15:53:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-22 15:53:37,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-10-22 15:53:37,588 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 137 [2018-10-22 15:53:37,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:37,589 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-10-22 15:53:37,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-22 15:53:37,589 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-10-22 15:53:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-22 15:53:37,590 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:37,590 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:37,590 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:37,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:37,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1034208785, now seen corresponding path program 44 times [2018-10-22 15:53:37,591 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:37,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:37,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:37,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:53:37,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:37,600 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:53:37,600 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:53:37,600 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:53:37,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:53:37,733 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:53:37,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:37,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:41,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:53:41,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-10-22 15:53:41,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-22 15:53:41,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-22 15:53:41,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=8372, Unknown=0, NotChecked=0, Total=8556 [2018-10-22 15:53:41,986 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 93 states. [2018-10-22 15:53:46,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:46,580 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-10-22 15:53:46,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-22 15:53:46,581 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 140 [2018-10-22 15:53:46,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:46,582 INFO L225 Difference]: With dead ends: 148 [2018-10-22 15:53:46,582 INFO L226 Difference]: Without dead ends: 144 [2018-10-22 15:53:46,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=194, Invalid=8736, Unknown=0, NotChecked=0, Total=8930 [2018-10-22 15:53:46,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-22 15:53:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-22 15:53:46,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-22 15:53:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-10-22 15:53:46,588 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 140 [2018-10-22 15:53:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:46,589 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-10-22 15:53:46,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-22 15:53:46,589 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-10-22 15:53:46,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-22 15:53:46,589 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:46,590 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:46,590 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:46,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:46,590 INFO L82 PathProgramCache]: Analyzing trace with hash -334271444, now seen corresponding path program 45 times [2018-10-22 15:53:46,590 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:46,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:46,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:46,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:46,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:46,598 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:53:46,598 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:53:46,598 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:53:46,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:53:48,136 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-22 15:53:48,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:48,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:49,566 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-22 15:53:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:53,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:53:53,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-10-22 15:53:53,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-22 15:53:53,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-22 15:53:53,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2018-10-22 15:53:53,955 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 95 states. [2018-10-22 15:53:58,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:58,919 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-22 15:53:58,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-22 15:53:58,919 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 143 [2018-10-22 15:53:58,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:58,920 INFO L225 Difference]: With dead ends: 151 [2018-10-22 15:53:58,920 INFO L226 Difference]: Without dead ends: 147 [2018-10-22 15:53:58,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=197, Invalid=9115, Unknown=0, NotChecked=0, Total=9312 [2018-10-22 15:53:58,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-22 15:53:58,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-22 15:53:58,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-22 15:53:58,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-22 15:53:58,926 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 143 [2018-10-22 15:53:58,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:58,926 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-22 15:53:58,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-22 15:53:58,926 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-22 15:53:58,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-22 15:53:58,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:58,927 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:58,927 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:58,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:58,927 INFO L82 PathProgramCache]: Analyzing trace with hash -899199951, now seen corresponding path program 46 times [2018-10-22 15:53:58,927 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:58,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:58,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:58,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:58,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:58,935 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:53:58,936 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:53:58,936 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:53:58,953 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:53:59,077 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:53:59,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:59,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:03,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:54:03,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-10-22 15:54:03,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-22 15:54:03,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-22 15:54:03,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=9120, Unknown=0, NotChecked=0, Total=9312 [2018-10-22 15:54:03,371 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 97 states. [2018-10-22 15:54:08,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:08,403 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-10-22 15:54:08,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-22 15:54:08,403 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 146 [2018-10-22 15:54:08,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:08,404 INFO L225 Difference]: With dead ends: 154 [2018-10-22 15:54:08,404 INFO L226 Difference]: Without dead ends: 150 [2018-10-22 15:54:08,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=202, Invalid=9500, Unknown=0, NotChecked=0, Total=9702 [2018-10-22 15:54:08,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-22 15:54:08,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-22 15:54:08,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-22 15:54:08,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-10-22 15:54:08,410 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 146 [2018-10-22 15:54:08,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:08,411 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-10-22 15:54:08,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-22 15:54:08,411 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-10-22 15:54:08,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-22 15:54:08,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:08,411 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:08,412 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:08,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:08,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1292481036, now seen corresponding path program 47 times [2018-10-22 15:54:08,412 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:08,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:08,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:08,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:08,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:08,420 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:54:08,420 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:54:08,420 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:54:08,436 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:54:08,577 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-22 15:54:08,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:08,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:13,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:54:13,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2018-10-22 15:54:13,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-22 15:54:13,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-22 15:54:13,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=9506, Unknown=0, NotChecked=0, Total=9702 [2018-10-22 15:54:13,029 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 99 states. [2018-10-22 15:54:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:18,247 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-22 15:54:18,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-22 15:54:18,248 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 149 [2018-10-22 15:54:18,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:18,249 INFO L225 Difference]: With dead ends: 157 [2018-10-22 15:54:18,249 INFO L226 Difference]: Without dead ends: 153 [2018-10-22 15:54:18,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=206, Invalid=9894, Unknown=0, NotChecked=0, Total=10100 [2018-10-22 15:54:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-22 15:54:18,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-22 15:54:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-22 15:54:18,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-22 15:54:18,255 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 149 [2018-10-22 15:54:18,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:18,256 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-22 15:54:18,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-22 15:54:18,256 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-22 15:54:18,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-22 15:54:18,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:18,257 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:18,257 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:18,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:18,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1567930961, now seen corresponding path program 48 times [2018-10-22 15:54:18,257 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:18,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:18,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:18,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:18,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:18,265 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:54:18,265 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:54:18,266 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:54:18,280 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:54:18,493 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-22 15:54:18,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:18,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:23,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:54:23,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2018-10-22 15:54:23,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-22 15:54:23,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-22 15:54:23,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=9900, Unknown=0, NotChecked=0, Total=10100 [2018-10-22 15:54:23,103 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 101 states. [2018-10-22 15:54:28,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:28,547 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-10-22 15:54:28,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-22 15:54:28,547 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 152 [2018-10-22 15:54:28,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:28,548 INFO L225 Difference]: With dead ends: 160 [2018-10-22 15:54:28,548 INFO L226 Difference]: Without dead ends: 156 [2018-10-22 15:54:28,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=210, Invalid=10296, Unknown=0, NotChecked=0, Total=10506 [2018-10-22 15:54:28,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-22 15:54:28,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-22 15:54:28,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-22 15:54:28,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-10-22 15:54:28,553 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 152 [2018-10-22 15:54:28,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:28,553 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-10-22 15:54:28,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-22 15:54:28,553 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-10-22 15:54:28,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-22 15:54:28,554 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:28,554 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:28,554 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:28,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:28,555 INFO L82 PathProgramCache]: Analyzing trace with hash -185856020, now seen corresponding path program 49 times [2018-10-22 15:54:28,555 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:28,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:28,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:28,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:28,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:28,563 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:54:28,563 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:54:28,563 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:54:28,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:54:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:28,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:33,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:54:33,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2018-10-22 15:54:33,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-22 15:54:33,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-22 15:54:33,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=10302, Unknown=0, NotChecked=0, Total=10506 [2018-10-22 15:54:33,487 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 103 states. [2018-10-22 15:54:39,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:39,150 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-22 15:54:39,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-22 15:54:39,150 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 155 [2018-10-22 15:54:39,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:39,152 INFO L225 Difference]: With dead ends: 163 [2018-10-22 15:54:39,152 INFO L226 Difference]: Without dead ends: 159 [2018-10-22 15:54:39,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=214, Invalid=10706, Unknown=0, NotChecked=0, Total=10920 [2018-10-22 15:54:39,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-22 15:54:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-22 15:54:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-22 15:54:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-22 15:54:39,157 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 155 [2018-10-22 15:54:39,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:39,157 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-22 15:54:39,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-22 15:54:39,158 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-22 15:54:39,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-22 15:54:39,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:39,159 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:39,159 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:39,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:39,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1023348849, now seen corresponding path program 50 times [2018-10-22 15:54:39,159 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:39,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:39,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:39,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:54:39,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:39,167 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:54:39,168 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:54:39,168 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:54:39,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:54:39,316 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:54:39,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:39,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:44,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:54:44,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2018-10-22 15:54:44,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-22 15:54:44,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-22 15:54:44,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=10712, Unknown=0, NotChecked=0, Total=10920 [2018-10-22 15:54:44,257 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 105 states. [2018-10-22 15:54:50,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:50,106 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-10-22 15:54:50,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-22 15:54:50,106 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 158 [2018-10-22 15:54:50,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:50,108 INFO L225 Difference]: With dead ends: 166 [2018-10-22 15:54:50,108 INFO L226 Difference]: Without dead ends: 162 [2018-10-22 15:54:50,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=218, Invalid=11124, Unknown=0, NotChecked=0, Total=11342 [2018-10-22 15:54:50,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-22 15:54:50,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-22 15:54:50,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-22 15:54:50,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-10-22 15:54:50,114 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 158 [2018-10-22 15:54:50,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:50,114 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-10-22 15:54:50,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-22 15:54:50,115 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-10-22 15:54:50,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-22 15:54:50,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:50,116 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 51, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:50,116 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:50,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:50,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1740077620, now seen corresponding path program 51 times [2018-10-22 15:54:50,116 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:50,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:50,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:50,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:50,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:50,124 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:54:50,125 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:54:50,125 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:54:50,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:54:52,728 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-22 15:54:52,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:52,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-22 15:54:57,072 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-22 15:54:57,272 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:54:57,273 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:54:57,279 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:54:57,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:54:57 BoogieIcfgContainer [2018-10-22 15:54:57,279 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:54:57,280 INFO L168 Benchmark]: Toolchain (without parser) took 246704.43 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 744.5 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -261.2 MB). Peak memory consumption was 483.3 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:57,281 INFO L168 Benchmark]: CDTParser took 0.24 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 15:54:57,281 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.87 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 15:54:57,282 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.69 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 15:54:57,282 INFO L168 Benchmark]: Boogie Preprocessor took 21.57 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 15:54:57,283 INFO L168 Benchmark]: RCFGBuilder took 368.16 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 744.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -805.2 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:57,283 INFO L168 Benchmark]: TraceAbstraction took 246009.49 ms. Allocated memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 524.3 kB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 533.4 MB). Peak memory consumption was 533.9 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:57,286 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.87 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 36.69 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 21.57 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 368.16 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 744.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -805.2 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 246009.49 ms. Allocated memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 524.3 kB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 533.4 MB). Peak memory consumption was 533.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 162 with TraceHistMax 52,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 94 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. TIMEOUT Result, 245.9s OverallTime, 53 OverallIterations, 52 TraceHistogramMax, 117.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1598 SDtfs, 151 SDslu, 99157 SDs, 0 SdLazy, 192777 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 92.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4284 GetRequests, 1483 SyntacticMatches, 0 SemanticMatches, 2801 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 113.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=52, 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: 0.2s AutomataMinimizationTime, 52 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 5.8s SatisfiabilityAnalysisTime, 111.7s InterpolantComputationTime, 4240 NumberOfCodeBlocks, 4240 NumberOfCodeBlocksAsserted, 685 NumberOfCheckSat, 4188 ConstructedInterpolants, 0 QuantifiedInterpolants, 3506588 SizeOfPredicates, 252 NumberOfNonLiveVariables, 8670 ConjunctsInSsa, 5669 ConjunctsInUnsatCore, 52 InterpolantComputations, 2 PerfectInterpolantSequences, 0/65025 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown