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-acceleration/diamond_false-unreach-call1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:40:34,791 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:40:34,793 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:40:34,809 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:40:34,810 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:40:34,811 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:40:34,812 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:40:34,814 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:40:34,816 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:40:34,817 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:40:34,818 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:40:34,818 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:40:34,819 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:40:34,820 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:40:34,821 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:40:34,822 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:40:34,823 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:40:34,825 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:40:34,828 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:40:34,830 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:40:34,831 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:40:34,832 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:40:34,835 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:40:34,844 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 15:40:34,860 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:40:34,860 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:40:34,861 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:40:34,861 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:40:34,862 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:40:34,862 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:40:34,863 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:40:34,863 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:40:34,863 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:40:34,863 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:40:34,863 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:40:34,864 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:40:34,864 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:40:34,864 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:40:34,864 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:40:34,864 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:40:34,865 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:40:34,865 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:40:34,865 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:40:34,865 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:40:34,865 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:40:34,866 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:40:34,866 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:40:34,866 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:40:34,866 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:40:34,866 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:40:34,867 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:40:34,867 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:40:34,911 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:40:34,927 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:40:34,932 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:40:34,934 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:40:34,934 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:40:34,936 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_false-unreach-call1.i [2018-10-22 15:40:35,009 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/83972f382/41e142adaeec475ea15c84176f7d01a2/FLAG4b8875bb6 [2018-10-22 15:40:35,492 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:40:35,493 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_false-unreach-call1.i [2018-10-22 15:40:35,500 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/83972f382/41e142adaeec475ea15c84176f7d01a2/FLAG4b8875bb6 [2018-10-22 15:40:35,523 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/83972f382/41e142adaeec475ea15c84176f7d01a2 [2018-10-22 15:40:35,533 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:40:35,534 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:40:35,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:40:35,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:40:35,541 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:40:35,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:40:35" (1/1) ... [2018-10-22 15:40:35,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e5b32d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:35, skipping insertion in model container [2018-10-22 15:40:35,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:40:35" (1/1) ... [2018-10-22 15:40:35,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:40:35,578 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:40:35,773 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:40:35,777 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:40:35,795 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:40:35,811 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:40:35,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:35 WrapperNode [2018-10-22 15:40:35,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:40:35,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:40:35,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:40:35,813 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:40:35,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:35" (1/1) ... [2018-10-22 15:40:35,829 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:35" (1/1) ... [2018-10-22 15:40:35,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:40:35,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:40:35,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:40:35,853 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:40:35,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:35" (1/1) ... [2018-10-22 15:40:35,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:35" (1/1) ... [2018-10-22 15:40:35,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:35" (1/1) ... [2018-10-22 15:40:35,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:35" (1/1) ... [2018-10-22 15:40:35,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:35" (1/1) ... [2018-10-22 15:40:35,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:35" (1/1) ... [2018-10-22 15:40:35,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:35" (1/1) ... [2018-10-22 15:40:35,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:40:35,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:40:35,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:40:35,883 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:40:35,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:35" (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 15:40:36,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:40:36,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:40:36,203 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:40:36,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:40:36 BoogieIcfgContainer [2018-10-22 15:40:36,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:40:36,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:40:36,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:40:36,209 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:40:36,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:40:35" (1/3) ... [2018-10-22 15:40:36,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b69e3f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:40:36, skipping insertion in model container [2018-10-22 15:40:36,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:35" (2/3) ... [2018-10-22 15:40:36,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b69e3f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:40:36, skipping insertion in model container [2018-10-22 15:40:36,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:40:36" (3/3) ... [2018-10-22 15:40:36,214 INFO L112 eAbstractionObserver]: Analyzing ICFG diamond_false-unreach-call1.i [2018-10-22 15:40:36,224 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:40:36,232 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:40:36,250 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:40:36,288 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:40:36,289 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:40:36,289 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:40:36,289 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:40:36,289 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:40:36,289 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:40:36,290 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:40:36,290 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:40:36,290 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:40:36,302 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-10-22 15:40:36,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-22 15:40:36,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:36,310 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-22 15:40:36,312 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:36,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:36,319 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2018-10-22 15:40:36,321 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:36,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:36,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:36,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:36,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:36,424 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 15:40:36,426 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:40:36,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:40:36,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:40:36,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:40:36,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:40:36,447 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-10-22 15:40:36,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:36,465 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-22 15:40:36,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:40:36,466 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-22 15:40:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:36,478 INFO L225 Difference]: With dead ends: 21 [2018-10-22 15:40:36,480 INFO L226 Difference]: Without dead ends: 9 [2018-10-22 15:40:36,486 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 15:40:36,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-22 15:40:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-22 15:40:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-22 15:40:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-22 15:40:36,519 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-22 15:40:36,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:36,519 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-22 15:40:36,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:40:36,519 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-22 15:40:36,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-22 15:40:36,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:36,520 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:36,521 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:36,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:36,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1805929617, now seen corresponding path program 1 times [2018-10-22 15:40:36,521 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:36,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:36,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:36,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:36,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:36,743 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 15:40:36,744 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:40:36,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:40:36,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:40:36,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:40:36,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:40:36,748 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-10-22 15:40:36,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:36,869 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2018-10-22 15:40:36,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:40:36,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-22 15:40:36,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:36,872 INFO L225 Difference]: With dead ends: 16 [2018-10-22 15:40:36,873 INFO L226 Difference]: Without dead ends: 12 [2018-10-22 15:40:36,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:40:36,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-22 15:40:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-10-22 15:40:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-22 15:40:36,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-22 15:40:36,878 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2018-10-22 15:40:36,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:36,879 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-22 15:40:36,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:40:36,879 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-22 15:40:36,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:40:36,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:36,880 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:36,881 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:36,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:36,881 INFO L82 PathProgramCache]: Analyzing trace with hash -992266740, now seen corresponding path program 1 times [2018-10-22 15:40:36,881 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:36,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:36,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:36,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:36,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:37,081 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 15:40:37,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:37,082 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:37,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:37,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:37,173 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 15:40:37,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:37,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-22 15:40:37,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:40:37,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:40:37,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:40:37,199 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2018-10-22 15:40:37,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:37,324 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-10-22 15:40:37,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:40:37,325 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-22 15:40:37,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:37,327 INFO L225 Difference]: With dead ends: 19 [2018-10-22 15:40:37,327 INFO L226 Difference]: Without dead ends: 15 [2018-10-22 15:40:37,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:40:37,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-22 15:40:37,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-10-22 15:40:37,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 15:40:37,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-22 15:40:37,334 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-10-22 15:40:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:37,334 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-22 15:40:37,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:40:37,336 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-22 15:40:37,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:40:37,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:37,337 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:37,337 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:37,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:37,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1049525042, now seen corresponding path program 1 times [2018-10-22 15:40:37,338 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:37,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:37,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:37,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:37,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:37,476 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 15:40:37,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:37,477 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:37,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:37,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:37,560 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 15:40:37,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:37,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-22 15:40:37,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:40:37,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:40:37,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:40:37,583 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2018-10-22 15:40:37,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:37,691 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-22 15:40:37,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:40:37,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-22 15:40:37,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:37,693 INFO L225 Difference]: With dead ends: 21 [2018-10-22 15:40:37,693 INFO L226 Difference]: Without dead ends: 17 [2018-10-22 15:40:37,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:40:37,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-22 15:40:37,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-22 15:40:37,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 15:40:37,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-22 15:40:37,698 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-10-22 15:40:37,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:37,698 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-22 15:40:37,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:40:37,699 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-22 15:40:37,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 15:40:37,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:37,700 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:37,700 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:37,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:37,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1039690063, now seen corresponding path program 2 times [2018-10-22 15:40:37,701 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:37,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:37,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:37,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:37,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:37,892 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 15:40:37,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:37,893 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:37,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:37,919 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:37,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:37,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:37,937 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 15:40:37,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:37,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-22 15:40:37,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:40:37,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:40:37,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:40:37,960 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2018-10-22 15:40:38,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:38,186 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2018-10-22 15:40:38,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:40:38,188 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-22 15:40:38,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:38,189 INFO L225 Difference]: With dead ends: 24 [2018-10-22 15:40:38,189 INFO L226 Difference]: Without dead ends: 20 [2018-10-22 15:40:38,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:40:38,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-22 15:40:38,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2018-10-22 15:40:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-22 15:40:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2018-10-22 15:40:38,194 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2018-10-22 15:40:38,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:38,195 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2018-10-22 15:40:38,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:40:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2018-10-22 15:40:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 15:40:38,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:38,196 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:38,196 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:38,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:38,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1096948365, now seen corresponding path program 1 times [2018-10-22 15:40:38,197 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:38,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:38,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:38,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:38,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:38,300 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:40:38,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:40:38,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:40:38,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:40:38,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:40:38,301 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2018-10-22 15:40:38,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:38,382 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-10-22 15:40:38,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:40:38,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-10-22 15:40:38,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:38,384 INFO L225 Difference]: With dead ends: 33 [2018-10-22 15:40:38,384 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 15:40:38,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:40:38,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 15:40:38,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2018-10-22 15:40:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-22 15:40:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2018-10-22 15:40:38,392 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2018-10-22 15:40:38,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:38,392 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2018-10-22 15:40:38,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:40:38,393 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2018-10-22 15:40:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 15:40:38,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:38,393 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:38,394 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:38,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:38,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1719748433, now seen corresponding path program 2 times [2018-10-22 15:40:38,394 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:38,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:38,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:38,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:38,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:38,500 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:40:38,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:40:38,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:40:38,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:40:38,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:40:38,502 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 3 states. [2018-10-22 15:40:38,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:38,528 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-10-22 15:40:38,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:40:38,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-10-22 15:40:38,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:38,530 INFO L225 Difference]: With dead ends: 33 [2018-10-22 15:40:38,530 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 15:40:38,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:40:38,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 15:40:38,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2018-10-22 15:40:38,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-22 15:40:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-22 15:40:38,537 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2018-10-22 15:40:38,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:38,538 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-22 15:40:38,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:40:38,538 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-22 15:40:38,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 15:40:38,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:38,539 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:38,539 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:38,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:38,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1777006735, now seen corresponding path program 2 times [2018-10-22 15:40:38,540 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:38,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:38,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:38,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:38,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:38,804 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 15:40:38,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:38,804 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:38,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:38,829 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:38,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:38,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:38,844 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 15:40:38,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:38,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-22 15:40:38,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:40:38,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:40:38,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:40:38,873 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2018-10-22 15:40:38,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:38,957 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-10-22 15:40:38,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:40:38,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-22 15:40:38,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:38,960 INFO L225 Difference]: With dead ends: 30 [2018-10-22 15:40:38,960 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 15:40:38,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:40:38,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 15:40:38,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-22 15:40:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-22 15:40:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-22 15:40:38,966 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2018-10-22 15:40:38,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:38,967 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-22 15:40:38,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:40:38,967 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-22 15:40:38,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 15:40:38,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:38,968 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:38,968 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:38,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:38,968 INFO L82 PathProgramCache]: Analyzing trace with hash -783665172, now seen corresponding path program 3 times [2018-10-22 15:40:38,969 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:38,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:38,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:38,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:38,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:39,152 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 15:40:39,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:39,152 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:39,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:39,175 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:40:39,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:39,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:39,193 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 15:40:39,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:39,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-22 15:40:39,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:40:39,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:40:39,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:40:39,216 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2018-10-22 15:40:39,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:39,579 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-10-22 15:40:39,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:40:39,582 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-10-22 15:40:39,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:39,583 INFO L225 Difference]: With dead ends: 33 [2018-10-22 15:40:39,583 INFO L226 Difference]: Without dead ends: 29 [2018-10-22 15:40:39,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:40:39,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-22 15:40:39,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2018-10-22 15:40:39,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-22 15:40:39,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-22 15:40:39,598 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2018-10-22 15:40:39,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:39,599 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-22 15:40:39,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:40:39,599 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-22 15:40:39,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 15:40:39,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:39,604 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:39,605 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:39,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:39,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1779147282, now seen corresponding path program 3 times [2018-10-22 15:40:39,606 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:39,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:39,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:39,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:39,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:39,986 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 15:40:39,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:39,986 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:39,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:40,004 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:40:40,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:40,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:40,024 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 15:40:40,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:40,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-22 15:40:40,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:40:40,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:40:40,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:40:40,045 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2018-10-22 15:40:40,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:40,174 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-10-22 15:40:40,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:40:40,174 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-10-22 15:40:40,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:40,175 INFO L225 Difference]: With dead ends: 36 [2018-10-22 15:40:40,175 INFO L226 Difference]: Without dead ends: 32 [2018-10-22 15:40:40,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:40:40,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-22 15:40:40,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-10-22 15:40:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-22 15:40:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-22 15:40:40,184 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 16 [2018-10-22 15:40:40,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:40,184 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-22 15:40:40,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:40:40,184 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-22 15:40:40,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 15:40:40,185 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:40,185 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:40,186 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:40,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:40,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1408055087, now seen corresponding path program 4 times [2018-10-22 15:40:40,186 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:40,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:40,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:40,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:40,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:40,309 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 15:40:40,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:40,309 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:40,321 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:40:40,333 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:40:40,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:40,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:40,364 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 15:40:40,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:40,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-22 15:40:40,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:40:40,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:40:40,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:40:40,387 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 7 states. [2018-10-22 15:40:40,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:40,503 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-10-22 15:40:40,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:40:40,504 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-10-22 15:40:40,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:40,505 INFO L225 Difference]: With dead ends: 39 [2018-10-22 15:40:40,506 INFO L226 Difference]: Without dead ends: 35 [2018-10-22 15:40:40,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:40:40,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-22 15:40:40,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-10-22 15:40:40,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-22 15:40:40,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-22 15:40:40,513 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 19 [2018-10-22 15:40:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:40,513 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-22 15:40:40,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:40:40,513 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-22 15:40:40,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 15:40:40,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:40,514 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:40,515 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:40,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:40,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1123673519, now seen corresponding path program 4 times [2018-10-22 15:40:40,515 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:40,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:40,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:40,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:40,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:40,638 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 15:40:40,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:40,639 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:40,647 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:40:40,659 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:40:40,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:40,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:40,671 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 15:40:40,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:40,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-22 15:40:40,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:40:40,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:40:40,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:40:40,693 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 7 states. [2018-10-22 15:40:40,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:40,801 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-10-22 15:40:40,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:40:40,801 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-10-22 15:40:40,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:40,803 INFO L225 Difference]: With dead ends: 42 [2018-10-22 15:40:40,803 INFO L226 Difference]: Without dead ends: 38 [2018-10-22 15:40:40,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:40:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-22 15:40:40,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-10-22 15:40:40,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-22 15:40:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-10-22 15:40:40,809 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 19 [2018-10-22 15:40:40,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:40,809 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-10-22 15:40:40,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:40:40,810 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-10-22 15:40:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 15:40:40,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:40,811 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:40,811 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:40,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:40,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1104653876, now seen corresponding path program 5 times [2018-10-22 15:40:40,811 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:40,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:40,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:40,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:40,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:41,272 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 15:40:41,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:41,273 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:41,281 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:40:41,302 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 15:40:41,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:41,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:41,314 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 15:40:41,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:41,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-22 15:40:41,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:40:41,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:40:41,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:40:41,335 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 8 states. [2018-10-22 15:40:41,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:41,481 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-10-22 15:40:41,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:40:41,484 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-10-22 15:40:41,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:41,485 INFO L225 Difference]: With dead ends: 45 [2018-10-22 15:40:41,485 INFO L226 Difference]: Without dead ends: 41 [2018-10-22 15:40:41,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:40:41,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-22 15:40:41,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-10-22 15:40:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-22 15:40:41,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-22 15:40:41,491 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 22 [2018-10-22 15:40:41,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:41,491 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-22 15:40:41,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:40:41,491 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-22 15:40:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 15:40:41,492 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:41,492 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:41,492 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:41,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:41,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1173872398, now seen corresponding path program 5 times [2018-10-22 15:40:41,493 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:41,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:41,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:41,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:41,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:41,751 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 15:40:41,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:41,751 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:41,764 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:40:41,798 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 15:40:41,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:41,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:41,814 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 15:40:41,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:41,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-22 15:40:41,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:40:41,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:40:41,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:40:41,837 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 8 states. [2018-10-22 15:40:41,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:41,996 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-10-22 15:40:41,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:40:41,997 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-10-22 15:40:41,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:41,998 INFO L225 Difference]: With dead ends: 48 [2018-10-22 15:40:41,998 INFO L226 Difference]: Without dead ends: 44 [2018-10-22 15:40:41,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:40:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-22 15:40:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2018-10-22 15:40:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-22 15:40:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-22 15:40:42,006 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 22 [2018-10-22 15:40:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:42,006 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-22 15:40:42,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:40:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-22 15:40:42,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-22 15:40:42,007 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:42,007 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:42,008 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:42,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:42,008 INFO L82 PathProgramCache]: Analyzing trace with hash 909632241, now seen corresponding path program 6 times [2018-10-22 15:40:42,008 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:42,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:42,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:42,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:42,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:42,261 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 15:40:42,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:42,261 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:42,277 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:40:42,314 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 15:40:42,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:42,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:42,339 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 15:40:42,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:42,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-22 15:40:42,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:40:42,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:40:42,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:40:42,361 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 9 states. [2018-10-22 15:40:42,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:42,488 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-10-22 15:40:42,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:40:42,489 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-10-22 15:40:42,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:42,490 INFO L225 Difference]: With dead ends: 51 [2018-10-22 15:40:42,490 INFO L226 Difference]: Without dead ends: 47 [2018-10-22 15:40:42,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:40:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-22 15:40:42,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2018-10-22 15:40:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-22 15:40:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-22 15:40:42,498 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 25 [2018-10-22 15:40:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:42,499 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-22 15:40:42,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:40:42,499 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-22 15:40:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-22 15:40:42,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:42,500 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:42,501 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:42,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:42,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1529510607, now seen corresponding path program 6 times [2018-10-22 15:40:42,501 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:42,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:42,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:42,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:42,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:42,659 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 15:40:42,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:42,659 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:42,667 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:40:42,792 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 15:40:42,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:42,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:42,833 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 15:40:42,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:42,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-22 15:40:42,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:40:42,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:40:42,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:40:42,856 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 9 states. [2018-10-22 15:40:43,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:43,124 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-10-22 15:40:43,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:40:43,126 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-10-22 15:40:43,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:43,127 INFO L225 Difference]: With dead ends: 54 [2018-10-22 15:40:43,127 INFO L226 Difference]: Without dead ends: 50 [2018-10-22 15:40:43,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:40:43,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-22 15:40:43,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-10-22 15:40:43,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-22 15:40:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-10-22 15:40:43,134 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 25 [2018-10-22 15:40:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:43,135 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-10-22 15:40:43,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:40:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-10-22 15:40:43,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-22 15:40:43,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:43,136 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:43,136 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:43,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:43,137 INFO L82 PathProgramCache]: Analyzing trace with hash -775715924, now seen corresponding path program 7 times [2018-10-22 15:40:43,137 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:43,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:43,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:43,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:43,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:43,517 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 15:40:43,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:43,518 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:43,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:43,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:43,556 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 15:40:43,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:43,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-22 15:40:43,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:40:43,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:40:43,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:40:43,578 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 10 states. [2018-10-22 15:40:44,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:44,233 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-10-22 15:40:44,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:40:44,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-10-22 15:40:44,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:44,235 INFO L225 Difference]: With dead ends: 57 [2018-10-22 15:40:44,235 INFO L226 Difference]: Without dead ends: 53 [2018-10-22 15:40:44,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:40:44,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-22 15:40:44,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2018-10-22 15:40:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-22 15:40:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-22 15:40:44,243 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 28 [2018-10-22 15:40:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:44,244 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-22 15:40:44,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:40:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-22 15:40:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-22 15:40:44,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:44,245 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:44,245 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:44,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:44,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1214122030, now seen corresponding path program 7 times [2018-10-22 15:40:44,246 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:44,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:44,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:44,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:44,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:44,446 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 15:40:44,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:44,446 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:44,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:44,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:44,479 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 15:40:44,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:44,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-22 15:40:44,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:40:44,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:40:44,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:40:44,501 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 10 states. [2018-10-22 15:40:44,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:44,699 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-10-22 15:40:44,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:40:44,699 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-10-22 15:40:44,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:44,700 INFO L225 Difference]: With dead ends: 60 [2018-10-22 15:40:44,700 INFO L226 Difference]: Without dead ends: 56 [2018-10-22 15:40:44,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:40:44,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-22 15:40:44,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2018-10-22 15:40:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-22 15:40:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-10-22 15:40:44,708 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 28 [2018-10-22 15:40:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:44,709 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-10-22 15:40:44,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:40:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-10-22 15:40:44,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-22 15:40:44,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:44,711 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:44,711 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:44,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:44,711 INFO L82 PathProgramCache]: Analyzing trace with hash -815209199, now seen corresponding path program 8 times [2018-10-22 15:40:44,712 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:44,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:44,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:44,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:44,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:44,934 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 15:40:44,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:44,935 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:44,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:44,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:44,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:44,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:44,972 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 15:40:44,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:44,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-22 15:40:44,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:40:44,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:40:44,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:40:44,994 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 11 states. [2018-10-22 15:40:45,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:45,201 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-10-22 15:40:45,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:40:45,202 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-10-22 15:40:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:45,202 INFO L225 Difference]: With dead ends: 63 [2018-10-22 15:40:45,203 INFO L226 Difference]: Without dead ends: 59 [2018-10-22 15:40:45,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:40:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-22 15:40:45,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2018-10-22 15:40:45,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-22 15:40:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-10-22 15:40:45,209 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 31 [2018-10-22 15:40:45,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:45,210 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-10-22 15:40:45,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:40:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-10-22 15:40:45,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-22 15:40:45,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:45,211 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:45,211 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:45,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:45,212 INFO L82 PathProgramCache]: Analyzing trace with hash -748599279, now seen corresponding path program 8 times [2018-10-22 15:40:45,212 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:45,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:45,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:45,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:45,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:45,414 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 15:40:45,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:45,414 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:45,422 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:45,433 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:45,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:45,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:45,475 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 15:40:45,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:45,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-22 15:40:45,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:40:45,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:40:45,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:40:45,506 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 11 states. [2018-10-22 15:40:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:45,730 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-10-22 15:40:45,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:40:45,730 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-10-22 15:40:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:45,731 INFO L225 Difference]: With dead ends: 66 [2018-10-22 15:40:45,731 INFO L226 Difference]: Without dead ends: 62 [2018-10-22 15:40:45,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:40:45,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-22 15:40:45,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2018-10-22 15:40:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-22 15:40:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-10-22 15:40:45,739 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 31 [2018-10-22 15:40:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:45,740 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-10-22 15:40:45,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:40:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-10-22 15:40:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-22 15:40:45,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:45,741 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:45,741 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:45,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:45,742 INFO L82 PathProgramCache]: Analyzing trace with hash -538325620, now seen corresponding path program 9 times [2018-10-22 15:40:45,742 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:45,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:45,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:45,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:45,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:46,061 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 15:40:46,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:46,061 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:46,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:48,494 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-22 15:40:48,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:48,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:48,581 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 15:40:48,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:48,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-22 15:40:48,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:40:48,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:40:48,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:40:48,605 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 12 states. [2018-10-22 15:40:48,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:48,979 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-10-22 15:40:48,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:40:48,980 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-10-22 15:40:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:48,980 INFO L225 Difference]: With dead ends: 69 [2018-10-22 15:40:48,981 INFO L226 Difference]: Without dead ends: 65 [2018-10-22 15:40:48,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:40:48,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-22 15:40:48,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2018-10-22 15:40:48,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-22 15:40:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-10-22 15:40:48,987 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 34 [2018-10-22 15:40:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:48,988 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-10-22 15:40:48,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:40:48,988 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-10-22 15:40:48,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-22 15:40:48,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:48,989 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:48,989 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:48,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:48,989 INFO L82 PathProgramCache]: Analyzing trace with hash -494347954, now seen corresponding path program 9 times [2018-10-22 15:40:48,989 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:48,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:48,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:48,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:48,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:49,190 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 15:40:49,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:49,191 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:49,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:49,694 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-22 15:40:49,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:49,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:49,731 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 15:40:49,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:49,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-22 15:40:49,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:40:49,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:40:49,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:40:49,766 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 12 states. [2018-10-22 15:40:50,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:50,186 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-10-22 15:40:50,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:40:50,190 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-10-22 15:40:50,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:50,191 INFO L225 Difference]: With dead ends: 72 [2018-10-22 15:40:50,191 INFO L226 Difference]: Without dead ends: 68 [2018-10-22 15:40:50,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:40:50,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-22 15:40:50,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2018-10-22 15:40:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-22 15:40:50,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-10-22 15:40:50,196 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 34 [2018-10-22 15:40:50,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:50,197 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-10-22 15:40:50,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:40:50,197 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-10-22 15:40:50,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-22 15:40:50,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:50,198 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:50,198 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:50,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1763168049, now seen corresponding path program 10 times [2018-10-22 15:40:50,199 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:50,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:50,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:50,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:50,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:50,369 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 15:40:50,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:50,370 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:50,381 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:40:50,393 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:40:50,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:50,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:50,465 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 15:40:50,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:50,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-22 15:40:50,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:40:50,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:40:50,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:40:50,497 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 13 states. [2018-10-22 15:40:50,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:50,961 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-10-22 15:40:50,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:40:50,962 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-10-22 15:40:50,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:50,963 INFO L225 Difference]: With dead ends: 75 [2018-10-22 15:40:50,963 INFO L226 Difference]: Without dead ends: 71 [2018-10-22 15:40:50,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:40:50,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-22 15:40:50,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2018-10-22 15:40:50,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-22 15:40:50,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-22 15:40:50,970 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 37 [2018-10-22 15:40:50,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:50,971 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-22 15:40:50,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:40:50,971 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-22 15:40:50,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-22 15:40:50,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:50,972 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:50,972 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:50,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:50,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1879532273, now seen corresponding path program 10 times [2018-10-22 15:40:50,973 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:50,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:50,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:50,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:50,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:51,257 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 15:40:51,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:51,257 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:51,265 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:40:51,277 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:40:51,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:51,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:51,305 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 15:40:51,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:51,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-22 15:40:51,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:40:51,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:40:51,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:40:51,337 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 13 states. [2018-10-22 15:40:51,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:51,605 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-10-22 15:40:51,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:40:51,606 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-10-22 15:40:51,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:51,607 INFO L225 Difference]: With dead ends: 78 [2018-10-22 15:40:51,607 INFO L226 Difference]: Without dead ends: 74 [2018-10-22 15:40:51,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:40:51,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-22 15:40:51,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-10-22 15:40:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-22 15:40:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-22 15:40:51,612 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 37 [2018-10-22 15:40:51,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:51,612 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-22 15:40:51,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:40:51,612 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-22 15:40:51,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-22 15:40:51,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:51,613 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:51,613 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:51,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:51,614 INFO L82 PathProgramCache]: Analyzing trace with hash 703147884, now seen corresponding path program 11 times [2018-10-22 15:40:51,614 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:51,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:51,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:51,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:51,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:52,529 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 15:40:52,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:52,529 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:52,537 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:41:03,489 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-22 15:41:03,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:03,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:03,544 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 15:41:03,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:03,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-22 15:41:03,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:41:03,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:41:03,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:41:03,565 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 14 states. [2018-10-22 15:41:04,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:04,376 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-10-22 15:41:04,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:41:04,377 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2018-10-22 15:41:04,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:04,377 INFO L225 Difference]: With dead ends: 81 [2018-10-22 15:41:04,378 INFO L226 Difference]: Without dead ends: 77 [2018-10-22 15:41:04,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:41:04,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-22 15:41:04,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2018-10-22 15:41:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-22 15:41:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-22 15:41:04,384 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 40 [2018-10-22 15:41:04,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:04,384 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-22 15:41:04,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:41:04,385 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-22 15:41:04,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-22 15:41:04,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:04,385 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:04,386 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:04,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:04,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1213878894, now seen corresponding path program 11 times [2018-10-22 15:41:04,386 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:04,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:04,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:04,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:04,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:04,603 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 15:41:04,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:04,604 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:04,616 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:41:05,766 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-22 15:41:05,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:05,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:05,806 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 15:41:05,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:05,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-22 15:41:05,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:41:05,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:41:05,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:41:05,827 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 14 states. [2018-10-22 15:41:06,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:06,190 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-10-22 15:41:06,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:41:06,191 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2018-10-22 15:41:06,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:06,192 INFO L225 Difference]: With dead ends: 84 [2018-10-22 15:41:06,192 INFO L226 Difference]: Without dead ends: 80 [2018-10-22 15:41:06,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:41:06,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-22 15:41:06,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2018-10-22 15:41:06,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-22 15:41:06,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-10-22 15:41:06,197 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 40 [2018-10-22 15:41:06,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:06,197 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-10-22 15:41:06,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:41:06,197 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-10-22 15:41:06,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-22 15:41:06,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:06,198 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:06,198 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:06,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:06,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1758027439, now seen corresponding path program 12 times [2018-10-22 15:41:06,199 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:06,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:06,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:06,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:06,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:06,482 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 15:41:06,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:06,483 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:06,490 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:41:18,558 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-22 15:41:18,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:18,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:18,574 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 15:41:18,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:18,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-22 15:41:18,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:41:18,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:41:18,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:41:18,596 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 15 states. [2018-10-22 15:41:18,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:18,938 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-10-22 15:41:18,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:41:18,943 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-10-22 15:41:18,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:18,944 INFO L225 Difference]: With dead ends: 87 [2018-10-22 15:41:18,944 INFO L226 Difference]: Without dead ends: 83 [2018-10-22 15:41:18,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:41:18,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-22 15:41:18,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2018-10-22 15:41:18,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-22 15:41:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-10-22 15:41:18,949 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 43 [2018-10-22 15:41:18,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:18,949 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-10-22 15:41:18,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:41:18,949 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-10-22 15:41:18,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-22 15:41:18,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:18,950 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:18,950 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:18,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:18,951 INFO L82 PathProgramCache]: Analyzing trace with hash 598070737, now seen corresponding path program 12 times [2018-10-22 15:41:18,951 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:18,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:18,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:18,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:18,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:20,374 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 15:41:20,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:20,374 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:20,382 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:41:20,645 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-22 15:41:20,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:20,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:20,660 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 15:41:20,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:20,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-22 15:41:20,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:41:20,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:41:20,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:41:20,682 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 15 states. [2018-10-22 15:41:21,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:21,199 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-10-22 15:41:21,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:41:21,199 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-10-22 15:41:21,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:21,200 INFO L225 Difference]: With dead ends: 90 [2018-10-22 15:41:21,201 INFO L226 Difference]: Without dead ends: 86 [2018-10-22 15:41:21,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:41:21,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-22 15:41:21,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2018-10-22 15:41:21,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-22 15:41:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-10-22 15:41:21,207 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 43 [2018-10-22 15:41:21,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:21,207 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-10-22 15:41:21,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:41:21,208 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-10-22 15:41:21,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-22 15:41:21,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:21,208 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:21,209 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:21,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:21,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1049602380, now seen corresponding path program 13 times [2018-10-22 15:41:21,209 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:21,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:21,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:21,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:21,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:21,488 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 15:41:21,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:21,488 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:21,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:21,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:21,529 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 15:41:21,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:21,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-22 15:41:21,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:41:21,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:41:21,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:41:21,550 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 16 states. [2018-10-22 15:41:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:21,902 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-10-22 15:41:21,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:41:21,903 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2018-10-22 15:41:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:21,904 INFO L225 Difference]: With dead ends: 93 [2018-10-22 15:41:21,904 INFO L226 Difference]: Without dead ends: 89 [2018-10-22 15:41:21,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:41:21,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-22 15:41:21,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2018-10-22 15:41:21,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-22 15:41:21,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-10-22 15:41:21,911 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 46 [2018-10-22 15:41:21,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:21,911 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-10-22 15:41:21,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:41:21,912 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-10-22 15:41:21,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-22 15:41:21,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:21,912 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:21,913 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:21,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:21,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1137413234, now seen corresponding path program 13 times [2018-10-22 15:41:21,913 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:21,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:21,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:21,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:21,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:22,579 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 15:41:22,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:22,580 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:22,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:22,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:22,632 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 15:41:22,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:22,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-22 15:41:22,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:41:22,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:41:22,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:41:22,663 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 16 states. [2018-10-22 15:41:23,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:23,369 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-10-22 15:41:23,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:41:23,370 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2018-10-22 15:41:23,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:23,371 INFO L225 Difference]: With dead ends: 96 [2018-10-22 15:41:23,371 INFO L226 Difference]: Without dead ends: 92 [2018-10-22 15:41:23,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:41:23,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-22 15:41:23,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2018-10-22 15:41:23,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-22 15:41:23,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-22 15:41:23,377 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 46 [2018-10-22 15:41:23,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:23,377 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-22 15:41:23,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:41:23,377 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-22 15:41:23,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-22 15:41:23,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:23,378 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:23,378 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:23,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:23,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1338549391, now seen corresponding path program 14 times [2018-10-22 15:41:23,379 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:23,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:23,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:23,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:23,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:23,653 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 15:41:23,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:23,654 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:23,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:41:23,676 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:41:23,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:23,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:23,693 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 15:41:23,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:23,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-22 15:41:23,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:41:23,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:41:23,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:41:23,714 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 17 states. [2018-10-22 15:41:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:24,136 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-10-22 15:41:24,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:41:24,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-10-22 15:41:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:24,137 INFO L225 Difference]: With dead ends: 99 [2018-10-22 15:41:24,137 INFO L226 Difference]: Without dead ends: 95 [2018-10-22 15:41:24,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:41:24,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-22 15:41:24,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2018-10-22 15:41:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-22 15:41:24,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-22 15:41:24,144 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 49 [2018-10-22 15:41:24,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:24,145 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-22 15:41:24,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:41:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-22 15:41:24,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-22 15:41:24,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:24,146 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:24,146 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:24,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:24,146 INFO L82 PathProgramCache]: Analyzing trace with hash -124084047, now seen corresponding path program 14 times [2018-10-22 15:41:24,147 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:24,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:24,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:24,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:24,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:24,916 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 15:41:24,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:24,916 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:24,930 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:41:24,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:41:24,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:24,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:25,045 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 15:41:25,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:25,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-22 15:41:25,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:41:25,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:41:25,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:41:25,080 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 17 states. [2018-10-22 15:41:25,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:25,542 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-10-22 15:41:25,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:41:25,543 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-10-22 15:41:25,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:25,544 INFO L225 Difference]: With dead ends: 102 [2018-10-22 15:41:25,544 INFO L226 Difference]: Without dead ends: 98 [2018-10-22 15:41:25,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:41:25,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-22 15:41:25,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2018-10-22 15:41:25,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-22 15:41:25,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-10-22 15:41:25,550 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 49 [2018-10-22 15:41:25,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:25,550 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-10-22 15:41:25,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:41:25,550 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-10-22 15:41:25,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-22 15:41:25,551 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:25,551 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:25,551 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:25,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:25,551 INFO L82 PathProgramCache]: Analyzing trace with hash -634701012, now seen corresponding path program 15 times [2018-10-22 15:41:25,551 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:25,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:25,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:25,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:25,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:26,730 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 15:41:26,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:26,730 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:26,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:41:33,114 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-22 15:41:33,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:33,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:33,179 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 15:41:33,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:33,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-22 15:41:33,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:41:33,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:41:33,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:41:33,201 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 18 states. [2018-10-22 15:41:33,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:33,593 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-10-22 15:41:33,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:41:33,593 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-22 15:41:33,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:33,594 INFO L225 Difference]: With dead ends: 105 [2018-10-22 15:41:33,594 INFO L226 Difference]: Without dead ends: 101 [2018-10-22 15:41:33,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:41:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-22 15:41:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2018-10-22 15:41:33,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-22 15:41:33,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-22 15:41:33,601 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 52 [2018-10-22 15:41:33,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:33,601 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-22 15:41:33,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:41:33,601 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-22 15:41:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-22 15:41:33,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:33,602 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:33,602 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:33,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:33,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1359397714, now seen corresponding path program 15 times [2018-10-22 15:41:33,603 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:33,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:33,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:33,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:33,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:34,025 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 15:41:34,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:34,026 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:34,034 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:41:38,624 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-22 15:41:38,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:38,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:38,656 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 15:41:38,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:38,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-22 15:41:38,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:41:38,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:41:38,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:41:38,679 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 18 states. [2018-10-22 15:41:39,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:39,154 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-10-22 15:41:39,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:41:39,155 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-22 15:41:39,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:39,156 INFO L225 Difference]: With dead ends: 108 [2018-10-22 15:41:39,156 INFO L226 Difference]: Without dead ends: 104 [2018-10-22 15:41:39,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:41:39,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-22 15:41:39,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2018-10-22 15:41:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-22 15:41:39,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-10-22 15:41:39,162 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 52 [2018-10-22 15:41:39,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:39,162 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-10-22 15:41:39,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:41:39,163 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-10-22 15:41:39,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-22 15:41:39,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:39,163 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:39,164 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:39,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:39,164 INFO L82 PathProgramCache]: Analyzing trace with hash -317981295, now seen corresponding path program 16 times [2018-10-22 15:41:39,164 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:39,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:39,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:39,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:39,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:39,555 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 15:41:39,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:39,556 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:39,563 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:41:39,579 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:41:39,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:39,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:39,595 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 15:41:39,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:39,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-22 15:41:39,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:41:39,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:41:39,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:41:39,617 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 19 states. [2018-10-22 15:41:40,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:40,065 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-10-22 15:41:40,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:41:40,065 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-10-22 15:41:40,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:40,067 INFO L225 Difference]: With dead ends: 111 [2018-10-22 15:41:40,067 INFO L226 Difference]: Without dead ends: 107 [2018-10-22 15:41:40,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:41:40,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-22 15:41:40,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2018-10-22 15:41:40,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-22 15:41:40,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-22 15:41:40,073 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 55 [2018-10-22 15:41:40,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:40,074 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-22 15:41:40,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:41:40,074 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-22 15:41:40,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-22 15:41:40,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:40,075 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:40,075 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:40,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:40,075 INFO L82 PathProgramCache]: Analyzing trace with hash 985908113, now seen corresponding path program 16 times [2018-10-22 15:41:40,075 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:40,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:40,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:40,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:40,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:41,124 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 15:41:41,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:41,125 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:41,131 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:41:41,149 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:41:41,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:41,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:41,165 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 15:41:41,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:41,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-22 15:41:41,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:41:41,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:41:41,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:41:41,188 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 19 states. [2018-10-22 15:41:41,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:41,756 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-10-22 15:41:41,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:41:41,757 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-10-22 15:41:41,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:41,758 INFO L225 Difference]: With dead ends: 114 [2018-10-22 15:41:41,758 INFO L226 Difference]: Without dead ends: 110 [2018-10-22 15:41:41,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:41:41,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-22 15:41:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2018-10-22 15:41:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-22 15:41:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-10-22 15:41:41,765 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 55 [2018-10-22 15:41:41,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:41,765 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-10-22 15:41:41,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:41:41,766 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-10-22 15:41:41,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-22 15:41:41,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:41,766 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:41,767 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:41,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:41,767 INFO L82 PathProgramCache]: Analyzing trace with hash -964041460, now seen corresponding path program 17 times [2018-10-22 15:41:41,767 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:41,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:41,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:41,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:41,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:42,759 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 15:41:42,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:42,759 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:42,773 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:41:58,545 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-22 15:41:58,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:58,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:58,605 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 15:41:58,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:58,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-22 15:41:58,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:41:58,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:41:58,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:41:58,634 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 20 states. [2018-10-22 15:41:59,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:59,141 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-10-22 15:41:59,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:41:59,141 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2018-10-22 15:41:59,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:59,142 INFO L225 Difference]: With dead ends: 117 [2018-10-22 15:41:59,142 INFO L226 Difference]: Without dead ends: 113 [2018-10-22 15:41:59,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:41:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-22 15:41:59,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2018-10-22 15:41:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-22 15:41:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-22 15:41:59,149 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 58 [2018-10-22 15:41:59,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:59,149 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-22 15:41:59,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:41:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-22 15:41:59,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-22 15:41:59,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:59,150 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:59,150 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:59,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:59,151 INFO L82 PathProgramCache]: Analyzing trace with hash -536171058, now seen corresponding path program 17 times [2018-10-22 15:41:59,151 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:59,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:59,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:59,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:59,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:00,125 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 15:42:00,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:00,126 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:00,133 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:42:32,626 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-22 15:42:32,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:32,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:32,715 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 15:42:32,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:32,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-22 15:42:32,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:42:32,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:42:32,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:42:32,738 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 20 states. [2018-10-22 15:42:33,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:33,316 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-10-22 15:42:33,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:42:33,317 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2018-10-22 15:42:33,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:33,318 INFO L225 Difference]: With dead ends: 120 [2018-10-22 15:42:33,318 INFO L226 Difference]: Without dead ends: 116 [2018-10-22 15:42:33,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:42:33,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-22 15:42:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2018-10-22 15:42:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-22 15:42:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-22 15:42:33,323 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 58 [2018-10-22 15:42:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:33,323 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-22 15:42:33,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:42:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-22 15:42:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-22 15:42:33,324 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:33,324 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:33,324 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:33,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:33,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1993963599, now seen corresponding path program 18 times [2018-10-22 15:42:33,324 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:33,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:33,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:33,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:33,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:33,643 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 15:42:33,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:33,643 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:33,650 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:43:04,657 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-22 15:43:04,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:04,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:04,775 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 15:43:04,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:04,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-22 15:43:04,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:43:04,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:43:04,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:43:04,797 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 21 states. [2018-10-22 15:43:05,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:05,334 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-10-22 15:43:05,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 15:43:05,335 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2018-10-22 15:43:05,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:05,336 INFO L225 Difference]: With dead ends: 123 [2018-10-22 15:43:05,336 INFO L226 Difference]: Without dead ends: 119 [2018-10-22 15:43:05,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:43:05,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-22 15:43:05,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2018-10-22 15:43:05,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-22 15:43:05,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-10-22 15:43:05,342 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 61 [2018-10-22 15:43:05,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:05,342 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-10-22 15:43:05,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:43:05,343 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-10-22 15:43:05,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-22 15:43:05,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:05,343 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:05,343 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:05,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:05,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1467956849, now seen corresponding path program 18 times [2018-10-22 15:43:05,344 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:05,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:05,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:05,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:05,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:05,856 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 15:43:05,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:05,857 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:05,864 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:43:13,051 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-22 15:43:13,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:13,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:13,114 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 15:43:13,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:13,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-22 15:43:13,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:43:13,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:43:13,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:43:13,137 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 21 states. [2018-10-22 15:43:13,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:13,779 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-10-22 15:43:13,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 15:43:13,780 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2018-10-22 15:43:13,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:13,781 INFO L225 Difference]: With dead ends: 126 [2018-10-22 15:43:13,781 INFO L226 Difference]: Without dead ends: 122 [2018-10-22 15:43:13,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:43:13,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-22 15:43:13,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2018-10-22 15:43:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-22 15:43:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-10-22 15:43:13,787 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 61 [2018-10-22 15:43:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:13,787 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-10-22 15:43:13,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:43:13,787 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-10-22 15:43:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-22 15:43:13,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:13,788 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:13,788 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:13,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:13,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1158043924, now seen corresponding path program 19 times [2018-10-22 15:43:13,789 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:13,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:13,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:13,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:13,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:14,213 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 15:43:14,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:14,213 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:14,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:43:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:14,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:14,284 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 15:43:14,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:14,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-22 15:43:14,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:43:14,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:43:14,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:43:14,314 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 22 states. [2018-10-22 15:43:14,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:14,940 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-10-22 15:43:14,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:43:14,941 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2018-10-22 15:43:14,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:14,942 INFO L225 Difference]: With dead ends: 129 [2018-10-22 15:43:14,942 INFO L226 Difference]: Without dead ends: 125 [2018-10-22 15:43:14,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:43:14,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-22 15:43:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2018-10-22 15:43:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-22 15:43:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2018-10-22 15:43:14,949 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 64 [2018-10-22 15:43:14,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:14,949 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2018-10-22 15:43:14,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:43:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2018-10-22 15:43:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-22 15:43:14,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:14,950 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:14,950 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:14,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:14,950 INFO L82 PathProgramCache]: Analyzing trace with hash 2102052590, now seen corresponding path program 19 times [2018-10-22 15:43:14,950 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:14,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:14,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:14,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:43:14,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:15,720 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 15:43:15,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:15,720 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:15,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:43:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:15,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:15,785 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 15:43:15,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:15,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-22 15:43:15,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:43:15,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:43:15,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:43:15,814 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 22 states. [2018-10-22 15:43:16,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:16,574 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-10-22 15:43:16,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:43:16,574 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2018-10-22 15:43:16,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:16,575 INFO L225 Difference]: With dead ends: 132 [2018-10-22 15:43:16,575 INFO L226 Difference]: Without dead ends: 128 [2018-10-22 15:43:16,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:43:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-22 15:43:16,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2018-10-22 15:43:16,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-22 15:43:16,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-10-22 15:43:16,582 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 64 [2018-10-22 15:43:16,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:16,583 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-10-22 15:43:16,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:43:16,583 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-10-22 15:43:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-22 15:43:16,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:16,584 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:16,584 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:16,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:16,584 INFO L82 PathProgramCache]: Analyzing trace with hash -495388207, now seen corresponding path program 20 times [2018-10-22 15:43:16,584 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:16,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:16,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:16,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:43:16,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:17,794 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 15:43:17,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:17,795 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:17,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:43:17,821 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:43:17,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:17,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:17,836 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 15:43:17,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:17,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-22 15:43:17,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:43:17,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:43:17,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:43:17,857 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 23 states. [2018-10-22 15:43:18,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:18,509 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2018-10-22 15:43:18,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:43:18,509 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2018-10-22 15:43:18,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:18,511 INFO L225 Difference]: With dead ends: 135 [2018-10-22 15:43:18,511 INFO L226 Difference]: Without dead ends: 131 [2018-10-22 15:43:18,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:43:18,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-22 15:43:18,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2018-10-22 15:43:18,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-22 15:43:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-10-22 15:43:18,517 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 67 [2018-10-22 15:43:18,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:18,517 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-10-22 15:43:18,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:43:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-10-22 15:43:18,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-22 15:43:18,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:18,518 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:18,518 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:18,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:18,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1112862383, now seen corresponding path program 20 times [2018-10-22 15:43:18,519 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:18,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:18,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:18,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:18,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:19,506 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 15:43:19,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:19,506 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:19,513 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:43:19,536 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:43:19,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:19,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:19,560 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 15:43:19,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:19,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-22 15:43:19,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:43:19,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:43:19,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:43:19,582 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 23 states. [2018-10-22 15:43:20,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:20,353 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-10-22 15:43:20,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:43:20,354 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2018-10-22 15:43:20,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:20,355 INFO L225 Difference]: With dead ends: 138 [2018-10-22 15:43:20,355 INFO L226 Difference]: Without dead ends: 134 [2018-10-22 15:43:20,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:43:20,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-22 15:43:20,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2018-10-22 15:43:20,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-22 15:43:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-10-22 15:43:20,362 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 67 [2018-10-22 15:43:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:20,362 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-10-22 15:43:20,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:43:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-10-22 15:43:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-22 15:43:20,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:20,363 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:20,364 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:20,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:20,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1011384524, now seen corresponding path program 21 times [2018-10-22 15:43:20,364 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:20,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:20,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:20,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:20,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:20,787 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 15:43:20,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:20,787 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:20,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:43:45,467 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-22 15:43:45,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:45,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:45,503 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 15:43:45,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:45,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-22 15:43:45,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:43:45,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:43:45,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:43:45,525 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 24 states. [2018-10-22 15:43:47,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:47,833 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-10-22 15:43:47,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:43:47,833 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2018-10-22 15:43:47,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:47,834 INFO L225 Difference]: With dead ends: 141 [2018-10-22 15:43:47,835 INFO L226 Difference]: Without dead ends: 137 [2018-10-22 15:43:47,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:43:47,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-22 15:43:47,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2018-10-22 15:43:47,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-22 15:43:47,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-22 15:43:47,842 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 70 [2018-10-22 15:43:47,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:47,842 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-22 15:43:47,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:43:47,842 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-22 15:43:47,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-22 15:43:47,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:47,843 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:47,843 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:47,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:47,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1125877774, now seen corresponding path program 21 times [2018-10-22 15:43:47,844 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:47,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:47,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:47,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:47,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:48,356 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 15:43:48,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:48,356 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:48,364 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:45:05,282 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-22 15:45:05,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat Received shutdown request... [2018-10-22 15:45:06,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:06,998 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-22 15:45:07,198 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:45:07,199 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:45:07,204 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:45:07,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:45:07 BoogieIcfgContainer [2018-10-22 15:45:07,204 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:45:07,205 INFO L168 Benchmark]: Toolchain (without parser) took 271671.57 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 969.9 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -260.6 MB). Peak memory consumption was 709.3 MB. Max. memory is 7.1 GB. [2018-10-22 15:45:07,207 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:45:07,207 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.32 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 15:45:07,207 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.87 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 15:45:07,207 INFO L168 Benchmark]: Boogie Preprocessor took 29.63 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 15:45:07,208 INFO L168 Benchmark]: RCFGBuilder took 321.67 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 751.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -791.7 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:45:07,209 INFO L168 Benchmark]: TraceAbstraction took 270998.90 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 218.6 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 520.5 MB). Peak memory consumption was 739.1 MB. Max. memory is 7.1 GB. [2018-10-22 15:45:07,212 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 276.32 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 38.87 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 29.63 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 321.67 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 751.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -791.7 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 270998.90 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 218.6 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 520.5 MB). Peak memory consumption was 739.1 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 71 with TraceHistMax 22,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 24 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. TIMEOUT Result, 270.9s OverallTime, 46 OverallIterations, 22 TraceHistogramMax, 18.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 771 SDtfs, 50 SDslu, 8085 SDs, 0 SdLazy, 17696 SolverSat, 100 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2186 GetRequests, 1614 SyntacticMatches, 87 SemanticMatches, 485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=136occurred in iteration=45, 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, 45 MinimizatonAttempts, 54 StatesRemovedByMinimization, 44 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 150.3s SatisfiabilityAnalysisTime, 20.5s InterpolantComputationTime, 3259 NumberOfCodeBlocks, 3259 NumberOfCodeBlocksAsserted, 313 NumberOfCheckSat, 3173 ConstructedInterpolants, 0 QuantifiedInterpolants, 948175 SizeOfPredicates, 41 NumberOfNonLiveVariables, 2989 ConjunctsInSsa, 1009 ConjunctsInUnsatCore, 86 InterpolantComputations, 4 PerfectInterpolantSequences, 14/18998 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown