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/loops/eureka_01_true-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:36:22,845 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:36:22,848 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:36:22,864 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:36:22,864 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:36:22,865 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:36:22,869 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:36:22,872 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:36:22,874 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:36:22,875 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:36:22,876 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:36:22,876 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:36:22,877 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:36:22,878 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:36:22,879 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:36:22,880 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:36:22,881 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:36:22,883 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:36:22,885 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:36:22,886 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:36:22,887 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:36:22,888 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:36:22,891 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:36:22,903 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 15:36:22,918 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:36:22,918 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:36:22,919 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:36:22,919 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:36:22,920 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:36:22,920 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:36:22,921 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:36:22,921 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:36:22,921 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:36:22,921 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:36:22,922 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:36:22,922 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:36:22,922 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:36:22,922 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:36:22,922 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:36:22,923 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:36:22,923 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:36:22,923 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:36:22,923 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:36:22,923 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:36:22,924 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:36:22,924 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:36:22,924 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:36:22,924 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:36:22,924 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:36:22,925 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:36:22,925 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:36:22,925 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:36:22,975 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:36:22,993 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:36:22,998 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:36:22,999 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:36:23,000 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:36:23,001 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/eureka_01_true-unreach-call.i [2018-10-22 15:36:23,065 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cef021de5/e85ed6861cdf486bb37ce008687f0355/FLAGd1ccc75b1 [2018-10-22 15:36:23,521 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:36:23,522 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01_true-unreach-call.i [2018-10-22 15:36:23,533 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cef021de5/e85ed6861cdf486bb37ce008687f0355/FLAGd1ccc75b1 [2018-10-22 15:36:23,550 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cef021de5/e85ed6861cdf486bb37ce008687f0355 [2018-10-22 15:36:23,559 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:36:23,561 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:36:23,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:36:23,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:36:23,566 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:36:23,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:36:23" (1/1) ... [2018-10-22 15:36:23,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e1cff96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:23, skipping insertion in model container [2018-10-22 15:36:23,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:36:23" (1/1) ... [2018-10-22 15:36:23,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:36:23,604 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:36:23,847 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:36:23,862 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:36:23,924 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:36:23,947 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:36:23,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:23 WrapperNode [2018-10-22 15:36:23,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:36:23,949 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:36:23,949 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:36:23,949 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:36:23,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:23" (1/1) ... [2018-10-22 15:36:23,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:23" (1/1) ... [2018-10-22 15:36:24,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:36:24,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:36:24,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:36:24,022 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:36:24,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:23" (1/1) ... [2018-10-22 15:36:24,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:23" (1/1) ... [2018-10-22 15:36:24,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:23" (1/1) ... [2018-10-22 15:36:24,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:23" (1/1) ... [2018-10-22 15:36:24,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:23" (1/1) ... [2018-10-22 15:36:24,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:23" (1/1) ... [2018-10-22 15:36:24,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:23" (1/1) ... [2018-10-22 15:36:24,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:36:24,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:36:24,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:36:24,087 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:36:24,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:23" (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 15:36:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-10-22 15:36:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-10-22 15:36:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:36:24,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:36:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-10-22 15:36:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-10-22 15:36:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-10-22 15:36:25,263 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:36:25,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:36:25 BoogieIcfgContainer [2018-10-22 15:36:25,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:36:25,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:36:25,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:36:25,269 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:36:25,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:36:23" (1/3) ... [2018-10-22 15:36:25,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f61b508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:36:25, skipping insertion in model container [2018-10-22 15:36:25,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:23" (2/3) ... [2018-10-22 15:36:25,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f61b508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:36:25, skipping insertion in model container [2018-10-22 15:36:25,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:36:25" (3/3) ... [2018-10-22 15:36:25,273 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_01_true-unreach-call.i [2018-10-22 15:36:25,282 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:36:25,290 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:36:25,305 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:36:25,338 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:36:25,339 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:36:25,339 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:36:25,339 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:36:25,339 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:36:25,340 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:36:25,340 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:36:25,340 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:36:25,340 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:36:25,361 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states. [2018-10-22 15:36:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-22 15:36:25,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:25,373 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:25,375 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:25,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:25,381 INFO L82 PathProgramCache]: Analyzing trace with hash 780497550, now seen corresponding path program 1 times [2018-10-22 15:36:25,383 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:25,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:25,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:25,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:25,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:25,712 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 15:36:25,714 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:25,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:36:25,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:36:25,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:36:25,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:36:25,738 INFO L87 Difference]: Start difference. First operand 134 states. Second operand 2 states. [2018-10-22 15:36:25,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:25,768 INFO L93 Difference]: Finished difference Result 195 states and 218 transitions. [2018-10-22 15:36:25,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:36:25,770 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 79 [2018-10-22 15:36:25,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:25,784 INFO L225 Difference]: With dead ends: 195 [2018-10-22 15:36:25,784 INFO L226 Difference]: Without dead ends: 114 [2018-10-22 15:36:25,788 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 15:36:25,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-22 15:36:25,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-22 15:36:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-22 15:36:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2018-10-22 15:36:25,835 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 79 [2018-10-22 15:36:25,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:25,836 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2018-10-22 15:36:25,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:36:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2018-10-22 15:36:25,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-22 15:36:25,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:25,840 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:25,840 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:25,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:25,841 INFO L82 PathProgramCache]: Analyzing trace with hash 164022017, now seen corresponding path program 1 times [2018-10-22 15:36:25,841 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:25,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:25,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:25,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:25,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:26,229 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 15:36:26,230 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:26,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 15:36:26,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:36:26,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:36:26,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:36:26,234 INFO L87 Difference]: Start difference. First operand 114 states and 120 transitions. Second operand 4 states. [2018-10-22 15:36:26,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:26,480 INFO L93 Difference]: Finished difference Result 200 states and 216 transitions. [2018-10-22 15:36:26,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:36:26,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2018-10-22 15:36:26,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:26,483 INFO L225 Difference]: With dead ends: 200 [2018-10-22 15:36:26,483 INFO L226 Difference]: Without dead ends: 159 [2018-10-22 15:36:26,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:36:26,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-22 15:36:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2018-10-22 15:36:26,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-22 15:36:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2018-10-22 15:36:26,500 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 82 [2018-10-22 15:36:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:26,501 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2018-10-22 15:36:26,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:36:26,501 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2018-10-22 15:36:26,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-22 15:36:26,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:26,504 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:26,504 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:26,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:26,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1577792099, now seen corresponding path program 1 times [2018-10-22 15:36:26,505 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:26,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:26,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:26,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:26,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:36:26,673 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:26,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 15:36:26,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:36:26,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:36:26,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:36:26,674 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand 4 states. [2018-10-22 15:36:26,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:26,938 INFO L93 Difference]: Finished difference Result 206 states and 222 transitions. [2018-10-22 15:36:26,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:36:26,940 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2018-10-22 15:36:26,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:26,942 INFO L225 Difference]: With dead ends: 206 [2018-10-22 15:36:26,943 INFO L226 Difference]: Without dead ends: 157 [2018-10-22 15:36:26,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:36:26,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-22 15:36:26,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 119. [2018-10-22 15:36:26,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-22 15:36:26,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 125 transitions. [2018-10-22 15:36:26,955 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 125 transitions. Word has length 92 [2018-10-22 15:36:26,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:26,956 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 125 transitions. [2018-10-22 15:36:26,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:36:26,956 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 125 transitions. [2018-10-22 15:36:26,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-22 15:36:26,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:26,959 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:26,959 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:26,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:26,960 INFO L82 PathProgramCache]: Analyzing trace with hash 802083325, now seen corresponding path program 1 times [2018-10-22 15:36:26,960 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:26,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:26,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:26,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:26,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:36:27,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:27,347 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 15:36:27,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:27,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:36:27,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:27,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-22 15:36:27,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:36:27,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:36:27,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:36:27,784 INFO L87 Difference]: Start difference. First operand 119 states and 125 transitions. Second operand 7 states. [2018-10-22 15:36:28,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:28,416 INFO L93 Difference]: Finished difference Result 246 states and 265 transitions. [2018-10-22 15:36:28,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:36:28,418 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2018-10-22 15:36:28,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:28,423 INFO L225 Difference]: With dead ends: 246 [2018-10-22 15:36:28,423 INFO L226 Difference]: Without dead ends: 203 [2018-10-22 15:36:28,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:36:28,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-22 15:36:28,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 141. [2018-10-22 15:36:28,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-22 15:36:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 149 transitions. [2018-10-22 15:36:28,445 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 149 transitions. Word has length 92 [2018-10-22 15:36:28,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:28,445 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 149 transitions. [2018-10-22 15:36:28,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:36:28,446 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 149 transitions. [2018-10-22 15:36:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-22 15:36:28,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:28,448 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:28,449 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:28,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:28,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1197434401, now seen corresponding path program 1 times [2018-10-22 15:36:28,449 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:28,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:28,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:28,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:28,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-22 15:36:28,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:28,930 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 15:36:28,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:29,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-22 15:36:29,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:29,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-10-22 15:36:29,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:36:29,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:36:29,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:36:29,177 INFO L87 Difference]: Start difference. First operand 141 states and 149 transitions. Second operand 9 states. [2018-10-22 15:36:29,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:29,577 INFO L93 Difference]: Finished difference Result 309 states and 334 transitions. [2018-10-22 15:36:29,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:36:29,578 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 102 [2018-10-22 15:36:29,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:29,583 INFO L225 Difference]: With dead ends: 309 [2018-10-22 15:36:29,583 INFO L226 Difference]: Without dead ends: 248 [2018-10-22 15:36:29,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:36:29,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-10-22 15:36:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 165. [2018-10-22 15:36:29,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-22 15:36:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 176 transitions. [2018-10-22 15:36:29,599 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 176 transitions. Word has length 102 [2018-10-22 15:36:29,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:29,600 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 176 transitions. [2018-10-22 15:36:29,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:36:29,600 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 176 transitions. [2018-10-22 15:36:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-22 15:36:29,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:29,603 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:29,603 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:29,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:29,604 INFO L82 PathProgramCache]: Analyzing trace with hash -102032963, now seen corresponding path program 2 times [2018-10-22 15:36:29,604 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:29,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:29,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:29,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:29,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-22 15:36:29,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:29,887 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 15:36:29,895 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:36:29,946 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-10-22 15:36:29,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:29,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 15:36:30,135 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:36:30,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2018-10-22 15:36:30,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:36:30,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:36:30,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:36:30,137 INFO L87 Difference]: Start difference. First operand 165 states and 176 transitions. Second operand 9 states. [2018-10-22 15:36:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:30,742 INFO L93 Difference]: Finished difference Result 371 states and 402 transitions. [2018-10-22 15:36:30,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:36:30,742 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 112 [2018-10-22 15:36:30,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:30,744 INFO L225 Difference]: With dead ends: 371 [2018-10-22 15:36:30,745 INFO L226 Difference]: Without dead ends: 292 [2018-10-22 15:36:30,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:36:30,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-22 15:36:30,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 191. [2018-10-22 15:36:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-22 15:36:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 205 transitions. [2018-10-22 15:36:30,762 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 205 transitions. Word has length 112 [2018-10-22 15:36:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:30,762 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 205 transitions. [2018-10-22 15:36:30,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:36:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 205 transitions. [2018-10-22 15:36:30,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-22 15:36:30,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:30,766 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:30,766 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:30,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:30,766 INFO L82 PathProgramCache]: Analyzing trace with hash 202890186, now seen corresponding path program 1 times [2018-10-22 15:36:30,767 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:30,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:30,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:30,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:30,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 15:36:31,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:31,074 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:36:31,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:31,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 15:36:31,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:31,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-10-22 15:36:31,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:36:31,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:36:31,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:36:31,383 INFO L87 Difference]: Start difference. First operand 191 states and 205 transitions. Second operand 13 states. [2018-10-22 15:36:31,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:31,791 INFO L93 Difference]: Finished difference Result 436 states and 472 transitions. [2018-10-22 15:36:31,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:36:31,791 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 133 [2018-10-22 15:36:31,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:31,795 INFO L225 Difference]: With dead ends: 436 [2018-10-22 15:36:31,795 INFO L226 Difference]: Without dead ends: 337 [2018-10-22 15:36:31,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:36:31,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2018-10-22 15:36:31,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 215. [2018-10-22 15:36:31,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-22 15:36:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 232 transitions. [2018-10-22 15:36:31,811 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 232 transitions. Word has length 133 [2018-10-22 15:36:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:31,812 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 232 transitions. [2018-10-22 15:36:31,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:36:31,812 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 232 transitions. [2018-10-22 15:36:31,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-22 15:36:31,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:31,815 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:31,816 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:31,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:31,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1792969134, now seen corresponding path program 2 times [2018-10-22 15:36:31,816 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:31,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:31,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:31,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:31,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-22 15:36:31,967 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:31,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 15:36:31,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:36:31,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:36:31,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:36:31,969 INFO L87 Difference]: Start difference. First operand 215 states and 232 transitions. Second operand 4 states. [2018-10-22 15:36:32,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:32,147 INFO L93 Difference]: Finished difference Result 389 states and 426 transitions. [2018-10-22 15:36:32,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:36:32,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2018-10-22 15:36:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:32,150 INFO L225 Difference]: With dead ends: 389 [2018-10-22 15:36:32,150 INFO L226 Difference]: Without dead ends: 290 [2018-10-22 15:36:32,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:36:32,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-10-22 15:36:32,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 225. [2018-10-22 15:36:32,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-10-22 15:36:32,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 242 transitions. [2018-10-22 15:36:32,168 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 242 transitions. Word has length 143 [2018-10-22 15:36:32,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:32,169 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 242 transitions. [2018-10-22 15:36:32,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:36:32,169 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 242 transitions. [2018-10-22 15:36:32,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-22 15:36:32,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:32,171 INFO L375 BasicCegarLoop]: trace histogram [10, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:32,172 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:32,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:32,172 INFO L82 PathProgramCache]: Analyzing trace with hash -811429050, now seen corresponding path program 1 times [2018-10-22 15:36:32,172 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:32,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:32,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:32,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:32,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2018-10-22 15:36:32,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:32,566 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 15:36:32,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:32,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2018-10-22 15:36:33,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:33,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-22 15:36:33,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:36:33,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:36:33,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:36:33,091 INFO L87 Difference]: Start difference. First operand 225 states and 242 transitions. Second operand 7 states. [2018-10-22 15:36:33,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:33,247 INFO L93 Difference]: Finished difference Result 472 states and 514 transitions. [2018-10-22 15:36:33,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:36:33,248 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 198 [2018-10-22 15:36:33,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:33,250 INFO L225 Difference]: With dead ends: 472 [2018-10-22 15:36:33,251 INFO L226 Difference]: Without dead ends: 365 [2018-10-22 15:36:33,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:36:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2018-10-22 15:36:33,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 300. [2018-10-22 15:36:33,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-10-22 15:36:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 322 transitions. [2018-10-22 15:36:33,271 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 322 transitions. Word has length 198 [2018-10-22 15:36:33,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:33,271 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 322 transitions. [2018-10-22 15:36:33,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:36:33,278 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 322 transitions. [2018-10-22 15:36:33,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-22 15:36:33,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:33,280 INFO L375 BasicCegarLoop]: trace histogram [15, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:33,281 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:33,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:33,281 INFO L82 PathProgramCache]: Analyzing trace with hash 620066222, now seen corresponding path program 2 times [2018-10-22 15:36:33,281 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:33,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:33,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:33,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:33,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 226 proven. 15 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2018-10-22 15:36:33,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:33,693 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 15:36:33,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:36:45,853 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:36:45,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:45,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 226 proven. 15 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2018-10-22 15:36:46,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:46,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-10-22 15:36:46,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:36:46,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:36:46,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:36:46,034 INFO L87 Difference]: Start difference. First operand 300 states and 322 transitions. Second operand 9 states. [2018-10-22 15:36:46,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:46,263 INFO L93 Difference]: Finished difference Result 607 states and 658 transitions. [2018-10-22 15:36:46,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:36:46,263 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 253 [2018-10-22 15:36:46,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:46,266 INFO L225 Difference]: With dead ends: 607 [2018-10-22 15:36:46,266 INFO L226 Difference]: Without dead ends: 440 [2018-10-22 15:36:46,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:36:46,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2018-10-22 15:36:46,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 375. [2018-10-22 15:36:46,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2018-10-22 15:36:46,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 402 transitions. [2018-10-22 15:36:46,284 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 402 transitions. Word has length 253 [2018-10-22 15:36:46,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:46,284 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 402 transitions. [2018-10-22 15:36:46,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:36:46,285 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 402 transitions. [2018-10-22 15:36:46,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-10-22 15:36:46,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:46,287 INFO L375 BasicCegarLoop]: trace histogram [20, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 6, 6, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:46,287 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:46,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:46,287 INFO L82 PathProgramCache]: Analyzing trace with hash -979153338, now seen corresponding path program 3 times [2018-10-22 15:36:46,287 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:46,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:46,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:46,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:46,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1423 backedges. 462 proven. 39 refuted. 0 times theorem prover too weak. 922 trivial. 0 not checked. [2018-10-22 15:36:46,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:46,594 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 15:36:46,604 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:36:58,692 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-22 15:36:58,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:58,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1423 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1421 trivial. 0 not checked. [2018-10-22 15:36:59,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:59,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2018-10-22 15:36:59,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:36:59,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:36:59,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:36:59,008 INFO L87 Difference]: Start difference. First operand 375 states and 402 transitions. Second operand 9 states. [2018-10-22 15:37:00,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:00,951 INFO L93 Difference]: Finished difference Result 780 states and 841 transitions. [2018-10-22 15:37:00,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:37:00,951 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 308 [2018-10-22 15:37:00,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:00,956 INFO L225 Difference]: With dead ends: 780 [2018-10-22 15:37:00,956 INFO L226 Difference]: Without dead ends: 553 [2018-10-22 15:37:00,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:37:00,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2018-10-22 15:37:00,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 461. [2018-10-22 15:37:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2018-10-22 15:37:00,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 493 transitions. [2018-10-22 15:37:00,980 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 493 transitions. Word has length 308 [2018-10-22 15:37:00,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:00,981 INFO L481 AbstractCegarLoop]: Abstraction has 461 states and 493 transitions. [2018-10-22 15:37:00,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:37:00,981 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 493 transitions. [2018-10-22 15:37:00,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2018-10-22 15:37:00,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:00,984 INFO L375 BasicCegarLoop]: trace histogram [25, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:00,985 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:00,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:00,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1418268451, now seen corresponding path program 4 times [2018-10-22 15:37:00,985 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:00,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:00,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:00,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:37:00,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2421 backedges. 786 proven. 74 refuted. 0 times theorem prover too weak. 1561 trivial. 0 not checked. [2018-10-22 15:37:01,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:01,668 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 15:37:01,676 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:37:01,776 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:37:01,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:37:01,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:37:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2421 backedges. 49 proven. 642 refuted. 0 times theorem prover too weak. 1730 trivial. 0 not checked. [2018-10-22 15:37:02,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:37:02,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2018-10-22 15:37:02,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:37:02,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:37:02,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:37:02,095 INFO L87 Difference]: Start difference. First operand 461 states and 493 transitions. Second operand 16 states. [2018-10-22 15:37:03,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:03,811 INFO L93 Difference]: Finished difference Result 946 states and 1016 transitions. [2018-10-22 15:37:03,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:37:03,813 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 374 [2018-10-22 15:37:03,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:03,816 INFO L225 Difference]: With dead ends: 946 [2018-10-22 15:37:03,816 INFO L226 Difference]: Without dead ends: 648 [2018-10-22 15:37:03,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=429, Invalid=1293, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:37:03,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2018-10-22 15:37:03,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 547. [2018-10-22 15:37:03,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2018-10-22 15:37:03,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 584 transitions. [2018-10-22 15:37:03,844 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 584 transitions. Word has length 374 [2018-10-22 15:37:03,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:03,844 INFO L481 AbstractCegarLoop]: Abstraction has 547 states and 584 transitions. [2018-10-22 15:37:03,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:37:03,845 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 584 transitions. [2018-10-22 15:37:03,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2018-10-22 15:37:03,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:03,848 INFO L375 BasicCegarLoop]: trace histogram [30, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:03,849 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:03,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:03,849 INFO L82 PathProgramCache]: Analyzing trace with hash 199574502, now seen corresponding path program 5 times [2018-10-22 15:37:03,849 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:03,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:03,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:03,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:37:03,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 1198 proven. 120 refuted. 0 times theorem prover too weak. 2387 trivial. 0 not checked. [2018-10-22 15:37:04,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:04,798 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 15:37:04,805 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:37:06,293 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-22 15:37:06,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:37:06,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:37:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2145 proven. 120 refuted. 0 times theorem prover too weak. 1440 trivial. 0 not checked. [2018-10-22 15:37:06,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:37:06,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2018-10-22 15:37:06,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:37:06,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:37:06,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:37:06,605 INFO L87 Difference]: Start difference. First operand 547 states and 584 transitions. Second operand 17 states. [2018-10-22 15:37:06,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:06,760 INFO L93 Difference]: Finished difference Result 1066 states and 1149 transitions. [2018-10-22 15:37:06,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:37:06,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 440 [2018-10-22 15:37:06,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:06,765 INFO L225 Difference]: With dead ends: 1066 [2018-10-22 15:37:06,766 INFO L226 Difference]: Without dead ends: 697 [2018-10-22 15:37:06,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:37:06,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2018-10-22 15:37:06,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 697. [2018-10-22 15:37:06,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2018-10-22 15:37:06,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 744 transitions. [2018-10-22 15:37:06,795 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 744 transitions. Word has length 440 [2018-10-22 15:37:06,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:06,795 INFO L481 AbstractCegarLoop]: Abstraction has 697 states and 744 transitions. [2018-10-22 15:37:06,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:37:06,796 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 744 transitions. [2018-10-22 15:37:06,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2018-10-22 15:37:06,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:06,800 INFO L375 BasicCegarLoop]: trace histogram [40, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:06,800 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:06,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:06,801 INFO L82 PathProgramCache]: Analyzing trace with hash -885080346, now seen corresponding path program 6 times [2018-10-22 15:37:06,801 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:06,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:06,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:06,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:37:06,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7050 backedges. 2286 proven. 245 refuted. 0 times theorem prover too weak. 4519 trivial. 0 not checked. [2018-10-22 15:37:07,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:07,954 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 15:37:07,963 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:37:36,670 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 15:37:36,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:37:36,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:37:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7050 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 7011 trivial. 0 not checked. [2018-10-22 15:37:37,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:37:37,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2018-10-22 15:37:37,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:37:37,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:37:37,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:37:37,745 INFO L87 Difference]: Start difference. First operand 697 states and 744 transitions. Second operand 15 states. [2018-10-22 15:37:39,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:39,439 INFO L93 Difference]: Finished difference Result 1382 states and 1479 transitions. [2018-10-22 15:37:39,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-22 15:37:39,440 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 550 [2018-10-22 15:37:39,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:39,444 INFO L225 Difference]: With dead ends: 1382 [2018-10-22 15:37:39,445 INFO L226 Difference]: Without dead ends: 893 [2018-10-22 15:37:39,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=931, Invalid=1931, Unknown=0, NotChecked=0, Total=2862 [2018-10-22 15:37:39,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2018-10-22 15:37:39,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 783. [2018-10-22 15:37:39,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 783 states. [2018-10-22 15:37:39,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 835 transitions. [2018-10-22 15:37:39,478 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 835 transitions. Word has length 550 [2018-10-22 15:37:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:39,479 INFO L481 AbstractCegarLoop]: Abstraction has 783 states and 835 transitions. [2018-10-22 15:37:39,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:37:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 835 transitions. [2018-10-22 15:37:39,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2018-10-22 15:37:39,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:39,484 INFO L375 BasicCegarLoop]: trace histogram [45, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:39,484 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:39,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:39,485 INFO L82 PathProgramCache]: Analyzing trace with hash -789252035, now seen corresponding path program 7 times [2018-10-22 15:37:39,485 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:39,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:39,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:39,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:37:39,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9170 backedges. 2962 proven. 324 refuted. 0 times theorem prover too weak. 5884 trivial. 0 not checked. [2018-10-22 15:37:40,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:40,436 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 15:37:40,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:37:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:40,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:37:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9170 backedges. 2962 proven. 324 refuted. 0 times theorem prover too weak. 5884 trivial. 0 not checked. [2018-10-22 15:37:41,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:37:41,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-10-22 15:37:41,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:37:41,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:37:41,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:37:41,026 INFO L87 Difference]: Start difference. First operand 783 states and 835 transitions. Second operand 21 states. [2018-10-22 15:37:41,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:41,334 INFO L93 Difference]: Finished difference Result 1483 states and 1588 transitions. [2018-10-22 15:37:41,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:37:41,335 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 616 [2018-10-22 15:37:41,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:41,338 INFO L225 Difference]: With dead ends: 1483 [2018-10-22 15:37:41,338 INFO L226 Difference]: Without dead ends: 923 [2018-10-22 15:37:41,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:37:41,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2018-10-22 15:37:41,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 858. [2018-10-22 15:37:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 858 states. [2018-10-22 15:37:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 915 transitions. [2018-10-22 15:37:41,373 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 915 transitions. Word has length 616 [2018-10-22 15:37:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:41,374 INFO L481 AbstractCegarLoop]: Abstraction has 858 states and 915 transitions. [2018-10-22 15:37:41,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:37:41,374 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 915 transitions. [2018-10-22 15:37:41,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2018-10-22 15:37:41,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:41,379 INFO L375 BasicCegarLoop]: trace histogram [50, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:41,380 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:41,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:41,380 INFO L82 PathProgramCache]: Analyzing trace with hash 505398693, now seen corresponding path program 8 times [2018-10-22 15:37:41,380 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:41,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:41,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:41,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:37:41,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11530 backedges. 3726 proven. 414 refuted. 0 times theorem prover too weak. 7390 trivial. 0 not checked. [2018-10-22 15:37:42,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:42,165 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 15:37:42,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:37:49,381 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:37:49,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:37:49,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:37:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11530 backedges. 3726 proven. 414 refuted. 0 times theorem prover too weak. 7390 trivial. 0 not checked. [2018-10-22 15:37:50,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:37:50,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2018-10-22 15:37:50,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:37:50,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:37:50,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:37:50,065 INFO L87 Difference]: Start difference. First operand 858 states and 915 transitions. Second operand 23 states. [2018-10-22 15:37:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:50,245 INFO L93 Difference]: Finished difference Result 1618 states and 1732 transitions. [2018-10-22 15:37:50,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:37:50,246 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 671 [2018-10-22 15:37:50,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:50,251 INFO L225 Difference]: With dead ends: 1618 [2018-10-22 15:37:50,251 INFO L226 Difference]: Without dead ends: 998 [2018-10-22 15:37:50,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:37:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2018-10-22 15:37:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 933. [2018-10-22 15:37:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 933 states. [2018-10-22 15:37:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 995 transitions. [2018-10-22 15:37:50,286 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 995 transitions. Word has length 671 [2018-10-22 15:37:50,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:50,287 INFO L481 AbstractCegarLoop]: Abstraction has 933 states and 995 transitions. [2018-10-22 15:37:50,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:37:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 995 transitions. [2018-10-22 15:37:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2018-10-22 15:37:50,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:50,294 INFO L375 BasicCegarLoop]: trace histogram [55, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:50,295 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:50,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:50,295 INFO L82 PathProgramCache]: Analyzing trace with hash 329223229, now seen corresponding path program 9 times [2018-10-22 15:37:50,296 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:50,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:50,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:50,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:37:50,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 14165 backedges. 4578 proven. 515 refuted. 0 times theorem prover too weak. 9072 trivial. 0 not checked. [2018-10-22 15:37:50,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:50,929 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 15:37:50,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:38:13,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-22 15:38:13,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:38:13,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:38:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 14165 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 14091 trivial. 0 not checked. [2018-10-22 15:38:14,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:38:14,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2018-10-22 15:38:14,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:38:14,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:38:14,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:38:14,435 INFO L87 Difference]: Start difference. First operand 933 states and 995 transitions. Second operand 19 states. [2018-10-22 15:38:16,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:38:16,964 INFO L93 Difference]: Finished difference Result 2003 states and 2142 transitions. [2018-10-22 15:38:16,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-22 15:38:16,965 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 726 [2018-10-22 15:38:16,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:38:16,971 INFO L225 Difference]: With dead ends: 2003 [2018-10-22 15:38:16,971 INFO L226 Difference]: Without dead ends: 1323 [2018-10-22 15:38:16,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 722 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2190 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2166, Invalid=4806, Unknown=0, NotChecked=0, Total=6972 [2018-10-22 15:38:16,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2018-10-22 15:38:17,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1019. [2018-10-22 15:38:17,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2018-10-22 15:38:17,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1086 transitions. [2018-10-22 15:38:17,013 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1086 transitions. Word has length 726 [2018-10-22 15:38:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:38:17,013 INFO L481 AbstractCegarLoop]: Abstraction has 1019 states and 1086 transitions. [2018-10-22 15:38:17,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:38:17,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1086 transitions. [2018-10-22 15:38:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2018-10-22 15:38:17,021 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:38:17,021 INFO L375 BasicCegarLoop]: trace histogram [60, 55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:38:17,022 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:38:17,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:38:17,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1764194182, now seen corresponding path program 10 times [2018-10-22 15:38:17,022 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:38:17,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:38:17,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:38:17,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:38:17,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:38:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:38:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17121 backedges. 5518 proven. 627 refuted. 0 times theorem prover too weak. 10976 trivial. 0 not checked. [2018-10-22 15:38:18,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:38:18,237 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 15:38:18,248 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:38:18,453 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:38:18,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:38:18,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:38:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17121 backedges. 525 proven. 5248 refuted. 0 times theorem prover too weak. 11348 trivial. 0 not checked. [2018-10-22 15:38:19,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:38:19,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 33 [2018-10-22 15:38:19,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:38:19,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:38:19,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:38:19,245 INFO L87 Difference]: Start difference. First operand 1019 states and 1086 transitions. Second operand 33 states. [2018-10-22 15:38:23,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:38:23,084 INFO L93 Difference]: Finished difference Result 2390 states and 2557 transitions. [2018-10-22 15:38:23,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-22 15:38:23,085 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 792 [2018-10-22 15:38:23,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:38:23,091 INFO L225 Difference]: With dead ends: 2390 [2018-10-22 15:38:23,091 INFO L226 Difference]: Without dead ends: 1639 [2018-10-22 15:38:23,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 781 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5182 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2675, Invalid=13837, Unknown=0, NotChecked=0, Total=16512 [2018-10-22 15:38:23,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2018-10-22 15:38:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1105. [2018-10-22 15:38:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1105 states. [2018-10-22 15:38:23,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1177 transitions. [2018-10-22 15:38:23,143 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1177 transitions. Word has length 792 [2018-10-22 15:38:23,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:38:23,143 INFO L481 AbstractCegarLoop]: Abstraction has 1105 states and 1177 transitions. [2018-10-22 15:38:23,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:38:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1177 transitions. [2018-10-22 15:38:23,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 859 [2018-10-22 15:38:23,151 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:38:23,151 INFO L375 BasicCegarLoop]: trace histogram [65, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:38:23,152 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:38:23,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:38:23,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1622357917, now seen corresponding path program 11 times [2018-10-22 15:38:23,152 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:38:23,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:38:23,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:38:23,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:38:23,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:38:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:38:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20363 backedges. 6546 proven. 750 refuted. 0 times theorem prover too weak. 13067 trivial. 0 not checked. [2018-10-22 15:38:23,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:38:23,932 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 15:38:23,941 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:38:36,603 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2018-10-22 15:38:36,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:38:36,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:38:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20363 backedges. 11458 proven. 750 refuted. 0 times theorem prover too weak. 8155 trivial. 0 not checked. [2018-10-22 15:38:37,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:38:37,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2018-10-22 15:38:37,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:38:37,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:38:37,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:38:37,447 INFO L87 Difference]: Start difference. First operand 1105 states and 1177 transitions. Second operand 29 states. [2018-10-22 15:38:37,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:38:37,682 INFO L93 Difference]: Finished difference Result 2067 states and 2208 transitions. [2018-10-22 15:38:37,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:38:37,683 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 858 [2018-10-22 15:38:37,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:38:37,687 INFO L225 Difference]: With dead ends: 2067 [2018-10-22 15:38:37,687 INFO L226 Difference]: Without dead ends: 1245 [2018-10-22 15:38:37,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 846 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:38:37,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2018-10-22 15:38:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1180. [2018-10-22 15:38:37,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2018-10-22 15:38:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1257 transitions. [2018-10-22 15:38:37,730 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1257 transitions. Word has length 858 [2018-10-22 15:38:37,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:38:37,731 INFO L481 AbstractCegarLoop]: Abstraction has 1180 states and 1257 transitions. [2018-10-22 15:38:37,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:38:37,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1257 transitions. [2018-10-22 15:38:37,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 914 [2018-10-22 15:38:37,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:38:37,740 INFO L375 BasicCegarLoop]: trace histogram [70, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:38:37,740 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:38:37,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:38:37,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1209358075, now seen corresponding path program 12 times [2018-10-22 15:38:37,741 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:38:37,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:38:37,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:38:37,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:38:37,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:38:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:38:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 23823 backedges. 7662 proven. 884 refuted. 0 times theorem prover too weak. 15277 trivial. 0 not checked. [2018-10-22 15:38:38,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:38:38,856 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 15:38:38,863 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:39:12,847 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-22 15:39:12,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:39:12,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:39:13,349 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-22 15:39:13,351 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-22 15:39:13,352 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:13,356 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:13,371 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:13,371 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2018-10-22 15:39:13,433 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2018-10-22 15:39:13,441 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:13,443 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 23 [2018-10-22 15:39:13,443 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:13,464 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:13,486 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:13,486 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2018-10-22 15:39:13,559 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2018-10-22 15:39:13,583 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:13,597 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 45 [2018-10-22 15:39:13,599 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-22 15:39:13,621 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:39:13,700 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:39:13,701 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:41, output treesize:75 [2018-10-22 15:39:14,197 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-10-22 15:39:14,253 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 37 [2018-10-22 15:39:14,285 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:14,290 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2018-10-22 15:39:14,291 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:14,307 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:14,380 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2018-10-22 15:39:14,385 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:14,454 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 65 [2018-10-22 15:39:14,456 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2018-10-22 15:39:14,516 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:39:14,566 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2018-10-22 15:39:14,566 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:102, output treesize:94 [2018-10-22 15:39:15,381 WARN L179 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2018-10-22 15:39:15,812 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 57 [2018-10-22 15:39:15,816 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:15,820 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:15,823 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 56 [2018-10-22 15:39:15,824 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:15,843 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:15,921 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2018-10-22 15:39:15,929 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:15,938 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:15,950 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 56 [2018-10-22 15:39:15,951 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:15,977 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:16,034 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2018-10-22 15:39:16,035 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:135, output treesize:129 [2018-10-22 15:39:17,632 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-10-22 15:39:17,649 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2018-10-22 15:39:17,685 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:17,706 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:17,753 INFO L303 Elim1Store]: Index analysis took 102 ms [2018-10-22 15:39:17,754 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2018-10-22 15:39:17,755 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:17,777 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:17,819 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:17,820 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:3 [2018-10-22 15:39:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 23823 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2018-10-22 15:39:23,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:39:23,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 35 [2018-10-22 15:39:23,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:39:23,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:39:23,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:39:23,658 INFO L87 Difference]: Start difference. First operand 1180 states and 1257 transitions. Second operand 35 states. [2018-10-22 15:39:25,837 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 25 [2018-10-22 15:39:26,209 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 36 [2018-10-22 15:39:26,487 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 39 [2018-10-22 15:39:26,923 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 33 [2018-10-22 15:39:27,600 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2018-10-22 15:39:28,618 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2018-10-22 15:39:30,528 WARN L179 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2018-10-22 15:39:31,224 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2018-10-22 15:39:34,648 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2018-10-22 15:39:34,815 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 50 [2018-10-22 15:39:35,261 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2018-10-22 15:39:35,484 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2018-10-22 15:39:35,686 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2018-10-22 15:39:35,899 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2018-10-22 15:39:36,135 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2018-10-22 15:39:36,346 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2018-10-22 15:39:36,600 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2018-10-22 15:39:36,836 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2018-10-22 15:39:37,130 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2018-10-22 15:39:37,366 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2018-10-22 15:39:37,613 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2018-10-22 15:39:37,860 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2018-10-22 15:39:38,111 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2018-10-22 15:39:40,320 WARN L179 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2018-10-22 15:39:40,799 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2018-10-22 15:39:41,690 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2018-10-22 15:40:41,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:41,535 INFO L93 Difference]: Finished difference Result 3590 states and 3849 transitions. [2018-10-22 15:40:41,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-22 15:40:41,535 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 913 [2018-10-22 15:40:41,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:41,542 INFO L225 Difference]: With dead ends: 3590 [2018-10-22 15:40:41,542 INFO L226 Difference]: Without dead ends: 2486 [2018-10-22 15:40:41,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1035 GetRequests, 896 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5847 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=4003, Invalid=15734, Unknown=3, NotChecked=0, Total=19740 [2018-10-22 15:40:41,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2018-10-22 15:40:41,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2121. [2018-10-22 15:40:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2121 states. [2018-10-22 15:40:41,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 2277 transitions. [2018-10-22 15:40:41,638 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 2277 transitions. Word has length 913 [2018-10-22 15:40:41,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:41,639 INFO L481 AbstractCegarLoop]: Abstraction has 2121 states and 2277 transitions. [2018-10-22 15:40:41,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:40:41,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 2277 transitions. [2018-10-22 15:40:41,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 973 [2018-10-22 15:40:41,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:41,651 INFO L375 BasicCegarLoop]: trace histogram [75, 70, 70, 70, 70, 70, 70, 70, 70, 70, 69, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:41,651 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:41,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:41,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1221373729, now seen corresponding path program 1 times [2018-10-22 15:40:41,652 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:41,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:41,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:41,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:41,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 27558 backedges. 8866 proven. 1029 refuted. 0 times theorem prover too weak. 17663 trivial. 0 not checked. [2018-10-22 15:40:42,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:42,628 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 15:40:42,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:42,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 27558 backedges. 8866 proven. 1029 refuted. 0 times theorem prover too weak. 17663 trivial. 0 not checked. [2018-10-22 15:40:45,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:45,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2018-10-22 15:40:45,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:40:45,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:40:45,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:40:45,736 INFO L87 Difference]: Start difference. First operand 2121 states and 2277 transitions. Second operand 33 states. Received shutdown request... [2018-10-22 15:40:46,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:40:46,178 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:40:46,184 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:40:46,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:40:46 BoogieIcfgContainer [2018-10-22 15:40:46,185 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:40:46,186 INFO L168 Benchmark]: Toolchain (without parser) took 262625.94 ms. Allocated memory was 1.5 GB in the beginning and 3.4 GB in the end (delta: 1.8 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.5 GB). Peak memory consumption was 293.3 MB. Max. memory is 7.1 GB. [2018-10-22 15:40:46,187 INFO L168 Benchmark]: CDTParser took 0.24 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 15:40:46,187 INFO L168 Benchmark]: CACSL2BoogieTranslator took 386.49 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 15:40:46,188 INFO L168 Benchmark]: Boogie Procedure Inliner took 72.11 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 15:40:46,188 INFO L168 Benchmark]: Boogie Preprocessor took 64.70 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 15:40:46,189 INFO L168 Benchmark]: RCFGBuilder took 1178.06 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 762.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -779.6 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. [2018-10-22 15:40:46,189 INFO L168 Benchmark]: TraceAbstraction took 260919.68 ms. Allocated memory was 2.3 GB in the beginning and 3.4 GB in the end (delta: 1.1 GB). Free memory was 2.2 GB in the beginning and 3.0 GB in the end (delta: -779.0 MB). Peak memory consumption was 300.0 MB. Max. memory is 7.1 GB. [2018-10-22 15:40:46,193 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 386.49 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 72.11 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 64.70 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 1178.06 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 762.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -779.6 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 260919.68 ms. Allocated memory was 2.3 GB in the beginning and 3.4 GB in the end (delta: 1.1 GB). Free memory was 2.2 GB in the beginning and 3.0 GB in the end (delta: -779.0 MB). Peak memory consumption was 300.0 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 constructing difference of abstraction (2121states) and FLOYD_HOARE automaton (currently 3 states, 33 states before enhancement),while ReachableStatesComputation was computing reachable states (67 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 134 locations, 1 error locations. TIMEOUT Result, 260.8s OverallTime, 21 OverallIterations, 75 TraceHistogramMax, 94.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2325 SDtfs, 23722 SDslu, 18003 SDs, 0 SdLazy, 6591 SolverSat, 1593 SolverUnsat, 25 SolverUnknown, 0 SolverNotchecked, 62.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8643 GetRequests, 8017 SyntacticMatches, 0 SemanticMatches, 626 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15682 ImplicationChecksByTransitivity, 44.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2121occurred in iteration=20, 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: 0.5s AutomataMinimizationTime, 20 MinimizatonAttempts, 2343 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 132.2s SatisfiabilityAnalysisTime, 28.9s InterpolantComputationTime, 16616 NumberOfCodeBlocks, 14799 NumberOfCodeBlocksAsserted, 134 NumberOfCheckSat, 16578 ConstructedInterpolants, 827 QuantifiedInterpolants, 54475564 SizeOfPredicates, 50 NumberOfNonLiveVariables, 10456 ConjunctsInSsa, 182 ConjunctsInUnsatCore, 38 InterpolantComputations, 5 PerfectInterpolantSequences, 265172/279034 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown