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/eca-rers2012/Problem03_label55_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 15:01:32,086 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 15:01:32,088 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 15:01:32,100 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 15:01:32,101 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 15:01:32,102 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 15:01:32,103 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 15:01:32,105 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 15:01:32,106 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 15:01:32,107 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 15:01:32,108 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 15:01:32,109 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 15:01:32,110 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 15:01:32,111 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 15:01:32,112 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 15:01:32,113 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 15:01:32,113 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 15:01:32,115 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 15:01:32,117 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 15:01:32,119 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 15:01:32,124 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 15:01:32,126 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 15:01:32,131 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 15:01:32,146 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 [2018-10-24 15:01:32,176 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 15:01:32,176 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 15:01:32,177 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 15:01:32,177 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 15:01:32,179 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 15:01:32,179 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 15:01:32,179 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 15:01:32,179 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 15:01:32,179 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 15:01:32,180 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 15:01:32,180 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 15:01:32,180 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 15:01:32,180 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 15:01:32,180 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 15:01:32,181 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 15:01:32,181 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 15:01:32,181 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 15:01:32,182 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 15:01:32,182 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 15:01:32,182 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 15:01:32,182 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 15:01:32,182 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 15:01:32,182 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 15:01:32,184 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 15:01:32,184 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 15:01:32,184 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 15:01:32,185 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 15:01:32,185 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 15:01:32,250 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 15:01:32,262 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 15:01:32,268 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 15:01:32,270 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 15:01:32,270 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 15:01:32,271 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label55_true-unreach-call.c [2018-10-24 15:01:32,329 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f2334a444/0b3a268b638140568e988ae9734d070b/FLAG7e960c950 [2018-10-24 15:01:33,046 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 15:01:33,047 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label55_true-unreach-call.c [2018-10-24 15:01:33,068 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f2334a444/0b3a268b638140568e988ae9734d070b/FLAG7e960c950 [2018-10-24 15:01:33,084 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f2334a444/0b3a268b638140568e988ae9734d070b [2018-10-24 15:01:33,094 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 15:01:33,096 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 15:01:33,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 15:01:33,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 15:01:33,103 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 15:01:33,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 03:01:33" (1/1) ... [2018-10-24 15:01:33,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b2e66ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:01:33, skipping insertion in model container [2018-10-24 15:01:33,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 03:01:33" (1/1) ... [2018-10-24 15:01:33,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 15:01:33,220 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 15:01:33,975 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 15:01:33,982 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 15:01:34,461 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 15:01:34,487 INFO L193 MainTranslator]: Completed translation [2018-10-24 15:01:34,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:01:34 WrapperNode [2018-10-24 15:01:34,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 15:01:34,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 15:01:34,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 15:01:34,489 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 15:01:34,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:01:34" (1/1) ... [2018-10-24 15:01:34,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:01:34" (1/1) ... [2018-10-24 15:01:34,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 15:01:34,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 15:01:34,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 15:01:34,794 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 15:01:34,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:01:34" (1/1) ... [2018-10-24 15:01:34,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:01:34" (1/1) ... [2018-10-24 15:01:34,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:01:34" (1/1) ... [2018-10-24 15:01:34,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:01:34" (1/1) ... [2018-10-24 15:01:34,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:01:34" (1/1) ... [2018-10-24 15:01:34,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:01:34" (1/1) ... [2018-10-24 15:01:34,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:01:34" (1/1) ... [2018-10-24 15:01:34,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 15:01:34,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 15:01:34,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 15:01:34,915 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 15:01:34,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:01:34" (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 [2018-10-24 15:01:34,986 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 15:01:34,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 15:01:34,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 15:01:40,713 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 15:01:40,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:01:40 BoogieIcfgContainer [2018-10-24 15:01:40,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 15:01:40,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 15:01:40,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 15:01:40,719 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 15:01:40,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 03:01:33" (1/3) ... [2018-10-24 15:01:40,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4862146d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 03:01:40, skipping insertion in model container [2018-10-24 15:01:40,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:01:34" (2/3) ... [2018-10-24 15:01:40,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4862146d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 03:01:40, skipping insertion in model container [2018-10-24 15:01:40,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:01:40" (3/3) ... [2018-10-24 15:01:40,723 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label55_true-unreach-call.c [2018-10-24 15:01:40,734 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 15:01:40,743 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 15:01:40,762 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 15:01:40,802 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 15:01:40,802 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 15:01:40,802 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 15:01:40,803 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 15:01:40,803 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 15:01:40,803 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 15:01:40,803 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 15:01:40,803 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 15:01:40,803 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 15:01:40,830 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states. [2018-10-24 15:01:40,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-24 15:01:40,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:01:40,850 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 15:01:40,852 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:01:40,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:01:40,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1176819894, now seen corresponding path program 1 times [2018-10-24 15:01:40,860 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:01:40,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:01:40,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:40,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:01:40,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:01:41,819 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 15:01:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 15:01:41,908 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:01:41,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 15:01:41,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 15:01:41,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 15:01:41,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:01:41,934 INFO L87 Difference]: Start difference. First operand 303 states. Second operand 4 states. [2018-10-24 15:01:45,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:01:45,682 INFO L93 Difference]: Finished difference Result 1089 states and 1954 transitions. [2018-10-24 15:01:45,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 15:01:45,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2018-10-24 15:01:45,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:01:45,714 INFO L225 Difference]: With dead ends: 1089 [2018-10-24 15:01:45,714 INFO L226 Difference]: Without dead ends: 779 [2018-10-24 15:01:45,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:01:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2018-10-24 15:01:45,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 515. [2018-10-24 15:01:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2018-10-24 15:01:45,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 887 transitions. [2018-10-24 15:01:45,808 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 887 transitions. Word has length 163 [2018-10-24 15:01:45,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:01:45,810 INFO L481 AbstractCegarLoop]: Abstraction has 515 states and 887 transitions. [2018-10-24 15:01:45,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 15:01:45,810 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 887 transitions. [2018-10-24 15:01:45,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-10-24 15:01:45,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:01:45,816 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 15:01:45,817 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:01:45,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:01:45,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1931506105, now seen corresponding path program 1 times [2018-10-24 15:01:45,817 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:01:45,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:01:45,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:45,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:01:45,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:01:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 15:01:46,128 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:01:46,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 15:01:46,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 15:01:46,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 15:01:46,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:01:46,131 INFO L87 Difference]: Start difference. First operand 515 states and 887 transitions. Second operand 4 states. [2018-10-24 15:01:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:01:51,064 INFO L93 Difference]: Finished difference Result 1903 states and 3379 transitions. [2018-10-24 15:01:51,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 15:01:51,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2018-10-24 15:01:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:01:51,074 INFO L225 Difference]: With dead ends: 1903 [2018-10-24 15:01:51,074 INFO L226 Difference]: Without dead ends: 1390 [2018-10-24 15:01:51,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:01:51,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2018-10-24 15:01:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 927. [2018-10-24 15:01:51,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 927 states. [2018-10-24 15:01:51,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1521 transitions. [2018-10-24 15:01:51,131 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1521 transitions. Word has length 169 [2018-10-24 15:01:51,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:01:51,131 INFO L481 AbstractCegarLoop]: Abstraction has 927 states and 1521 transitions. [2018-10-24 15:01:51,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 15:01:51,132 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1521 transitions. [2018-10-24 15:01:51,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-24 15:01:51,138 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:01:51,139 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 15:01:51,139 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:01:51,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:01:51,139 INFO L82 PathProgramCache]: Analyzing trace with hash 753893355, now seen corresponding path program 1 times [2018-10-24 15:01:51,140 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:01:51,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:01:51,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:51,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:01:51,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:01:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 15:01:51,257 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:01:51,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 15:01:51,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 15:01:51,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 15:01:51,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:01:51,259 INFO L87 Difference]: Start difference. First operand 927 states and 1521 transitions. Second operand 3 states. [2018-10-24 15:01:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:01:53,203 INFO L93 Difference]: Finished difference Result 2684 states and 4465 transitions. [2018-10-24 15:01:53,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 15:01:53,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2018-10-24 15:01:53,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:01:53,215 INFO L225 Difference]: With dead ends: 2684 [2018-10-24 15:01:53,215 INFO L226 Difference]: Without dead ends: 1759 [2018-10-24 15:01:53,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:01:53,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2018-10-24 15:01:53,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1744. [2018-10-24 15:01:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1744 states. [2018-10-24 15:01:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 2808 transitions. [2018-10-24 15:01:53,263 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 2808 transitions. Word has length 172 [2018-10-24 15:01:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:01:53,263 INFO L481 AbstractCegarLoop]: Abstraction has 1744 states and 2808 transitions. [2018-10-24 15:01:53,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 15:01:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 2808 transitions. [2018-10-24 15:01:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-24 15:01:53,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:01:53,268 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 15:01:53,269 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:01:53,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:01:53,269 INFO L82 PathProgramCache]: Analyzing trace with hash 787191427, now seen corresponding path program 1 times [2018-10-24 15:01:53,269 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:01:53,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:01:53,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:53,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:01:53,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:01:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 15:01:53,370 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:01:53,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 15:01:53,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 15:01:53,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 15:01:53,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:01:53,372 INFO L87 Difference]: Start difference. First operand 1744 states and 2808 transitions. Second operand 4 states. [2018-10-24 15:01:55,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:01:55,591 INFO L93 Difference]: Finished difference Result 6800 states and 11033 transitions. [2018-10-24 15:01:55,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 15:01:55,592 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2018-10-24 15:01:55,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:01:55,618 INFO L225 Difference]: With dead ends: 6800 [2018-10-24 15:01:55,618 INFO L226 Difference]: Without dead ends: 5058 [2018-10-24 15:01:55,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:01:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5058 states. [2018-10-24 15:01:55,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5058 to 3383. [2018-10-24 15:01:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3383 states. [2018-10-24 15:01:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 5097 transitions. [2018-10-24 15:01:55,708 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 5097 transitions. Word has length 173 [2018-10-24 15:01:55,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:01:55,708 INFO L481 AbstractCegarLoop]: Abstraction has 3383 states and 5097 transitions. [2018-10-24 15:01:55,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 15:01:55,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 5097 transitions. [2018-10-24 15:01:55,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-24 15:01:55,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:01:55,714 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 15:01:55,715 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:01:55,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:01:55,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1229143632, now seen corresponding path program 1 times [2018-10-24 15:01:55,715 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:01:55,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:01:55,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:55,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:01:55,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:01:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 15:01:55,881 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:01:55,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 15:01:55,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 15:01:55,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 15:01:55,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:01:55,883 INFO L87 Difference]: Start difference. First operand 3383 states and 5097 transitions. Second operand 3 states. [2018-10-24 15:01:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:01:57,516 INFO L93 Difference]: Finished difference Result 8205 states and 12323 transitions. [2018-10-24 15:01:57,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 15:01:57,516 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 174 [2018-10-24 15:01:57,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:01:57,537 INFO L225 Difference]: With dead ends: 8205 [2018-10-24 15:01:57,537 INFO L226 Difference]: Without dead ends: 4824 [2018-10-24 15:01:57,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:01:57,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2018-10-24 15:01:57,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 4823. [2018-10-24 15:01:57,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4823 states. [2018-10-24 15:01:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4823 states to 4823 states and 7118 transitions. [2018-10-24 15:01:57,633 INFO L78 Accepts]: Start accepts. Automaton has 4823 states and 7118 transitions. Word has length 174 [2018-10-24 15:01:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:01:57,634 INFO L481 AbstractCegarLoop]: Abstraction has 4823 states and 7118 transitions. [2018-10-24 15:01:57,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 15:01:57,634 INFO L276 IsEmpty]: Start isEmpty. Operand 4823 states and 7118 transitions. [2018-10-24 15:01:57,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-24 15:01:57,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:01:57,642 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 15:01:57,642 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:01:57,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:01:57,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2115229801, now seen corresponding path program 1 times [2018-10-24 15:01:57,643 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:01:57,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:01:57,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:57,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:01:57,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:01:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 15:01:58,084 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:01:58,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 15:01:58,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 15:01:58,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 15:01:58,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:01:58,085 INFO L87 Difference]: Start difference. First operand 4823 states and 7118 transitions. Second operand 4 states. [2018-10-24 15:02:00,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:02:00,962 INFO L93 Difference]: Finished difference Result 17399 states and 25715 transitions. [2018-10-24 15:02:00,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 15:02:00,962 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 180 [2018-10-24 15:02:00,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:02:01,020 INFO L225 Difference]: With dead ends: 17399 [2018-10-24 15:02:01,020 INFO L226 Difference]: Without dead ends: 12578 [2018-10-24 15:02:01,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:02:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12578 states. [2018-10-24 15:02:01,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12578 to 12576. [2018-10-24 15:02:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12576 states. [2018-10-24 15:02:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12576 states to 12576 states and 16796 transitions. [2018-10-24 15:02:01,283 INFO L78 Accepts]: Start accepts. Automaton has 12576 states and 16796 transitions. Word has length 180 [2018-10-24 15:02:01,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:02:01,288 INFO L481 AbstractCegarLoop]: Abstraction has 12576 states and 16796 transitions. [2018-10-24 15:02:01,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 15:02:01,288 INFO L276 IsEmpty]: Start isEmpty. Operand 12576 states and 16796 transitions. [2018-10-24 15:02:01,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-24 15:02:01,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:02:01,312 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 15:02:01,312 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:02:01,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:02:01,313 INFO L82 PathProgramCache]: Analyzing trace with hash 473802841, now seen corresponding path program 1 times [2018-10-24 15:02:01,313 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:02:01,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:02:01,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:02:01,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:02:01,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:02:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:02:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-10-24 15:02:01,556 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:02:01,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 15:02:01,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 15:02:01,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 15:02:01,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:02:01,558 INFO L87 Difference]: Start difference. First operand 12576 states and 16796 transitions. Second operand 4 states. [2018-10-24 15:02:04,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:02:04,006 INFO L93 Difference]: Finished difference Result 44990 states and 59446 transitions. [2018-10-24 15:02:04,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 15:02:04,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 200 [2018-10-24 15:02:04,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:02:04,078 INFO L225 Difference]: With dead ends: 44990 [2018-10-24 15:02:04,079 INFO L226 Difference]: Without dead ends: 32416 [2018-10-24 15:02:04,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:02:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32416 states. [2018-10-24 15:02:04,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32416 to 22575. [2018-10-24 15:02:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22575 states. [2018-10-24 15:02:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22575 states to 22575 states and 28454 transitions. [2018-10-24 15:02:04,482 INFO L78 Accepts]: Start accepts. Automaton has 22575 states and 28454 transitions. Word has length 200 [2018-10-24 15:02:04,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:02:04,482 INFO L481 AbstractCegarLoop]: Abstraction has 22575 states and 28454 transitions. [2018-10-24 15:02:04,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 15:02:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 22575 states and 28454 transitions. [2018-10-24 15:02:04,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-24 15:02:04,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:02:04,519 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 15:02:04,519 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:02:04,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:02:04,519 INFO L82 PathProgramCache]: Analyzing trace with hash 588046225, now seen corresponding path program 1 times [2018-10-24 15:02:04,519 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:02:04,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:02:04,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:02:04,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:02:04,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:02:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:02:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 72 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-10-24 15:02:04,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 15:02:04,973 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 [2018-10-24 15:02:04,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:02:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:02:05,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 15:02:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 15:02:05,437 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 15:02:05,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-24 15:02:05,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 15:02:05,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 15:02:05,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-24 15:02:05,439 INFO L87 Difference]: Start difference. First operand 22575 states and 28454 transitions. Second operand 8 states. [2018-10-24 15:02:05,653 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 15:02:06,587 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 15:02:10,188 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-24 15:02:14,614 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-24 15:02:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:02:17,209 INFO L93 Difference]: Finished difference Result 115596 states and 145027 transitions. [2018-10-24 15:02:17,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 15:02:17,209 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 226 [2018-10-24 15:02:17,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:02:17,389 INFO L225 Difference]: With dead ends: 115596 [2018-10-24 15:02:17,389 INFO L226 Difference]: Without dead ends: 93023 [2018-10-24 15:02:17,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2018-10-24 15:02:17,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93023 states. [2018-10-24 15:02:18,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93023 to 89334. [2018-10-24 15:02:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89334 states. [2018-10-24 15:02:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89334 states to 89334 states and 105618 transitions. [2018-10-24 15:02:19,079 INFO L78 Accepts]: Start accepts. Automaton has 89334 states and 105618 transitions. Word has length 226 [2018-10-24 15:02:19,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:02:19,079 INFO L481 AbstractCegarLoop]: Abstraction has 89334 states and 105618 transitions. [2018-10-24 15:02:19,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 15:02:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 89334 states and 105618 transitions. [2018-10-24 15:02:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-24 15:02:19,116 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:02:19,116 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 15:02:19,117 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:02:19,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:02:19,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1208092616, now seen corresponding path program 1 times [2018-10-24 15:02:19,117 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:02:19,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:02:19,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:02:19,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:02:19,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:02:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:02:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 15:02:19,444 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:02:19,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 15:02:19,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 15:02:19,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 15:02:19,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:02:19,446 INFO L87 Difference]: Start difference. First operand 89334 states and 105618 transitions. Second operand 4 states. [2018-10-24 15:02:22,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:02:22,070 INFO L93 Difference]: Finished difference Result 214917 states and 252347 transitions. [2018-10-24 15:02:22,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 15:02:22,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 227 [2018-10-24 15:02:22,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:02:22,332 INFO L225 Difference]: With dead ends: 214917 [2018-10-24 15:02:22,332 INFO L226 Difference]: Without dead ends: 125585 [2018-10-24 15:02:22,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:02:22,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125585 states. [2018-10-24 15:02:24,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125585 to 95888. [2018-10-24 15:02:24,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95888 states. [2018-10-24 15:02:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95888 states to 95888 states and 112246 transitions. [2018-10-24 15:02:24,468 INFO L78 Accepts]: Start accepts. Automaton has 95888 states and 112246 transitions. Word has length 227 [2018-10-24 15:02:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:02:24,468 INFO L481 AbstractCegarLoop]: Abstraction has 95888 states and 112246 transitions. [2018-10-24 15:02:24,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 15:02:24,469 INFO L276 IsEmpty]: Start isEmpty. Operand 95888 states and 112246 transitions. [2018-10-24 15:02:24,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-24 15:02:24,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:02:24,490 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 15:02:24,490 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:02:24,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:02:24,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1206837492, now seen corresponding path program 1 times [2018-10-24 15:02:24,490 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:02:24,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:02:24,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:02:24,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:02:24,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:02:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:02:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 74 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 15:02:24,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 15:02:24,816 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 [2018-10-24 15:02:24,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:02:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:02:24,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 15:02:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 15:02:25,023 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 15:02:25,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-24 15:02:25,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 15:02:25,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 15:02:25,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 15:02:25,024 INFO L87 Difference]: Start difference. First operand 95888 states and 112246 transitions. Second operand 6 states. [2018-10-24 15:02:31,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:02:31,617 INFO L93 Difference]: Finished difference Result 288607 states and 338761 transitions. [2018-10-24 15:02:31,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 15:02:31,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 235 [2018-10-24 15:02:31,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:02:31,884 INFO L225 Difference]: With dead ends: 288607 [2018-10-24 15:02:31,884 INFO L226 Difference]: Without dead ends: 192721 [2018-10-24 15:02:31,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-10-24 15:02:32,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192721 states. [2018-10-24 15:02:34,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192721 to 161447. [2018-10-24 15:02:34,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161447 states. [2018-10-24 15:02:34,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161447 states to 161447 states and 184170 transitions. [2018-10-24 15:02:34,869 INFO L78 Accepts]: Start accepts. Automaton has 161447 states and 184170 transitions. Word has length 235 [2018-10-24 15:02:34,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:02:34,870 INFO L481 AbstractCegarLoop]: Abstraction has 161447 states and 184170 transitions. [2018-10-24 15:02:34,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 15:02:34,870 INFO L276 IsEmpty]: Start isEmpty. Operand 161447 states and 184170 transitions. [2018-10-24 15:02:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-10-24 15:02:34,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:02:34,896 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 15:02:34,896 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:02:34,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:02:34,896 INFO L82 PathProgramCache]: Analyzing trace with hash -490854985, now seen corresponding path program 1 times [2018-10-24 15:02:34,896 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:02:34,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:02:34,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:02:34,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:02:34,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:02:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:02:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-24 15:02:35,174 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:02:35,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 15:02:35,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 15:02:35,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 15:02:35,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:02:35,176 INFO L87 Difference]: Start difference. First operand 161447 states and 184170 transitions. Second operand 3 states. [2018-10-24 15:02:37,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:02:37,156 INFO L93 Difference]: Finished difference Result 442135 states and 503558 transitions. [2018-10-24 15:02:37,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 15:02:37,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 317 [2018-10-24 15:02:37,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:02:37,558 INFO L225 Difference]: With dead ends: 442135 [2018-10-24 15:02:37,558 INFO L226 Difference]: Without dead ends: 280690 [2018-10-24 15:02:37,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:02:37,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280690 states. [2018-10-24 15:02:42,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280690 to 280688. [2018-10-24 15:02:42,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280688 states. [2018-10-24 15:02:42,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280688 states to 280688 states and 319291 transitions. [2018-10-24 15:02:42,736 INFO L78 Accepts]: Start accepts. Automaton has 280688 states and 319291 transitions. Word has length 317 [2018-10-24 15:02:42,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:02:42,737 INFO L481 AbstractCegarLoop]: Abstraction has 280688 states and 319291 transitions. [2018-10-24 15:02:42,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 15:02:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 280688 states and 319291 transitions. [2018-10-24 15:02:42,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2018-10-24 15:02:42,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:02:42,777 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 15:02:42,777 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:02:42,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:02:42,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1553165065, now seen corresponding path program 1 times [2018-10-24 15:02:42,778 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:02:42,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:02:42,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:02:42,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:02:42,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:02:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:02:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 243 proven. 5 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2018-10-24 15:02:48,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 15:02:48,535 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 [2018-10-24 15:02:48,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:02:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:02:48,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 15:02:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-10-24 15:02:48,797 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 15:02:48,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2018-10-24 15:02:48,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 15:02:48,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 15:02:48,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 15:02:48,799 INFO L87 Difference]: Start difference. First operand 280688 states and 319291 transitions. Second operand 5 states. [2018-10-24 15:02:58,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:02:58,307 INFO L93 Difference]: Finished difference Result 1698375 states and 1928215 transitions. [2018-10-24 15:02:58,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 15:02:58,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 379 [2018-10-24 15:02:58,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:03:00,498 INFO L225 Difference]: With dead ends: 1698375 [2018-10-24 15:03:00,499 INFO L226 Difference]: Without dead ends: 1417689 [2018-10-24 15:03:02,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 378 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 15:03:03,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417689 states. [2018-10-24 15:03:19,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417689 to 955291. [2018-10-24 15:03:19,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955291 states. [2018-10-24 15:03:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955291 states to 955291 states and 1082765 transitions. [2018-10-24 15:03:20,806 INFO L78 Accepts]: Start accepts. Automaton has 955291 states and 1082765 transitions. Word has length 379 [2018-10-24 15:03:20,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:03:20,806 INFO L481 AbstractCegarLoop]: Abstraction has 955291 states and 1082765 transitions. [2018-10-24 15:03:20,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 15:03:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 955291 states and 1082765 transitions. [2018-10-24 15:03:20,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2018-10-24 15:03:20,907 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:03:20,908 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2018-10-24 15:03:20,908 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:03:20,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:03:20,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1495467861, now seen corresponding path program 1 times [2018-10-24 15:03:20,909 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:03:20,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:03:20,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:03:20,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:03:20,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:03:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:03:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 305 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-10-24 15:03:30,896 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:03:30,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 15:03:30,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 15:03:30,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 15:03:30,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:03:30,898 INFO L87 Difference]: Start difference. First operand 955291 states and 1082765 transitions. Second operand 4 states. [2018-10-24 15:03:42,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:03:42,341 INFO L93 Difference]: Finished difference Result 1898960 states and 2151616 transitions. [2018-10-24 15:03:42,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 15:03:42,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 404 [2018-10-24 15:03:42,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:03:43,864 INFO L225 Difference]: With dead ends: 1898960 [2018-10-24 15:03:43,865 INFO L226 Difference]: Without dead ends: 943671 [2018-10-24 15:03:44,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:03:44,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943671 states. [2018-10-24 15:04:00,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943671 to 943631. [2018-10-24 15:04:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943631 states. [2018-10-24 15:04:01,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943631 states to 943631 states and 1048545 transitions. [2018-10-24 15:04:01,639 INFO L78 Accepts]: Start accepts. Automaton has 943631 states and 1048545 transitions. Word has length 404 [2018-10-24 15:04:01,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:04:01,639 INFO L481 AbstractCegarLoop]: Abstraction has 943631 states and 1048545 transitions. [2018-10-24 15:04:01,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 15:04:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 943631 states and 1048545 transitions. [2018-10-24 15:04:01,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2018-10-24 15:04:01,727 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:04:01,727 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 15:04:01,728 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:04:01,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:04:01,728 INFO L82 PathProgramCache]: Analyzing trace with hash -184490042, now seen corresponding path program 1 times [2018-10-24 15:04:01,728 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:04:01,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:04:01,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:04:01,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:04:01,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:04:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:04:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 390 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-24 15:04:12,093 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:04:12,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 15:04:12,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 15:04:12,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 15:04:12,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:04:12,095 INFO L87 Difference]: Start difference. First operand 943631 states and 1048545 transitions. Second operand 3 states. [2018-10-24 15:04:23,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:04:23,444 INFO L93 Difference]: Finished difference Result 1850825 states and 2056973 transitions. [2018-10-24 15:04:23,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 15:04:23,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 426 [2018-10-24 15:04:23,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:04:24,837 INFO L225 Difference]: With dead ends: 1850825 [2018-10-24 15:04:24,837 INFO L226 Difference]: Without dead ends: 907196 [2018-10-24 15:04:26,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:04:27,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907196 states. [2018-10-24 15:04:39,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907196 to 894924. [2018-10-24 15:04:39,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894924 states. [2018-10-24 15:04:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894924 states to 894924 states and 974623 transitions. [2018-10-24 15:04:42,387 INFO L78 Accepts]: Start accepts. Automaton has 894924 states and 974623 transitions. Word has length 426 [2018-10-24 15:04:42,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:04:42,387 INFO L481 AbstractCegarLoop]: Abstraction has 894924 states and 974623 transitions. [2018-10-24 15:04:42,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 15:04:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 894924 states and 974623 transitions. [2018-10-24 15:04:42,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2018-10-24 15:04:42,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:04:42,570 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 15:04:42,570 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:04:42,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:04:42,570 INFO L82 PathProgramCache]: Analyzing trace with hash -246256377, now seen corresponding path program 1 times [2018-10-24 15:04:42,571 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:04:42,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:04:42,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:04:42,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:04:42,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:04:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:04:43,161 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-24 15:04:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2018-10-24 15:04:43,371 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:04:43,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 15:04:43,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 15:04:43,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 15:04:43,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 15:04:43,373 INFO L87 Difference]: Start difference. First operand 894924 states and 974623 transitions. Second operand 5 states.