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/Problem15_label17_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 20:30:54,961 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 20:30:54,966 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 20:30:54,979 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 20:30:54,979 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 20:30:54,980 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 20:30:54,981 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 20:30:54,983 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 20:30:54,985 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 20:30:54,986 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 20:30:54,987 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 20:30:54,987 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 20:30:54,988 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 20:30:54,989 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 20:30:54,990 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 20:30:54,991 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 20:30:54,992 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 20:30:54,994 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 20:30:54,996 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 20:30:54,997 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 20:30:54,998 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 20:30:54,999 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 20:30:55,002 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 20:30:55,011 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 [2018-10-23 20:30:55,034 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 20:30:55,035 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 20:30:55,035 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 20:30:55,036 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 20:30:55,036 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 20:30:55,036 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 20:30:55,037 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 20:30:55,037 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 20:30:55,037 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 20:30:55,037 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 20:30:55,037 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 20:30:55,038 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 20:30:55,038 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 20:30:55,038 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 20:30:55,038 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 20:30:55,038 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 20:30:55,039 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 20:30:55,039 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 20:30:55,039 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 20:30:55,039 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:30:55,039 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 20:30:55,040 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 20:30:55,040 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 20:30:55,040 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 20:30:55,040 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 20:30:55,040 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 20:30:55,040 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 20:30:55,041 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 20:30:55,083 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 20:30:55,095 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 20:30:55,099 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 20:30:55,101 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 20:30:55,101 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 20:30:55,102 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label17_true-unreach-call.c [2018-10-23 20:30:55,161 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/abd41d258/2ba15751da624beea0430d82b7377081/FLAGb74fffc70 [2018-10-23 20:30:55,835 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 20:30:55,836 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label17_true-unreach-call.c [2018-10-23 20:30:55,867 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/abd41d258/2ba15751da624beea0430d82b7377081/FLAGb74fffc70 [2018-10-23 20:30:55,888 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/abd41d258/2ba15751da624beea0430d82b7377081 [2018-10-23 20:30:55,900 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 20:30:55,902 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 20:30:55,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 20:30:55,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 20:30:55,909 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 20:30:55,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:30:55" (1/1) ... [2018-10-23 20:30:55,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c5ece5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:55, skipping insertion in model container [2018-10-23 20:30:55,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:30:55" (1/1) ... [2018-10-23 20:30:55,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 20:30:56,032 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 20:30:56,835 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:30:56,839 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 20:30:57,129 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:30:57,151 INFO L193 MainTranslator]: Completed translation [2018-10-23 20:30:57,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:57 WrapperNode [2018-10-23 20:30:57,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 20:30:57,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 20:30:57,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 20:30:57,153 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 20:30:57,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:57" (1/1) ... [2018-10-23 20:30:57,218 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:57" (1/1) ... [2018-10-23 20:30:57,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 20:30:57,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 20:30:57,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 20:30:57,532 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 20:30:57,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:57" (1/1) ... [2018-10-23 20:30:57,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:57" (1/1) ... [2018-10-23 20:30:57,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:57" (1/1) ... [2018-10-23 20:30:57,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:57" (1/1) ... [2018-10-23 20:30:57,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:57" (1/1) ... [2018-10-23 20:30:57,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:57" (1/1) ... [2018-10-23 20:30:57,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:57" (1/1) ... [2018-10-23 20:30:57,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 20:30:57,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 20:30:57,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 20:30:57,796 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 20:30:57,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:57" (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 [2018-10-23 20:30:57,870 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 20:30:57,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 20:30:57,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 20:31:05,429 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 20:31:05,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:31:05 BoogieIcfgContainer [2018-10-23 20:31:05,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 20:31:05,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 20:31:05,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 20:31:05,435 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 20:31:05,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:30:55" (1/3) ... [2018-10-23 20:31:05,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ada24ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:31:05, skipping insertion in model container [2018-10-23 20:31:05,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:30:57" (2/3) ... [2018-10-23 20:31:05,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ada24ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:31:05, skipping insertion in model container [2018-10-23 20:31:05,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:31:05" (3/3) ... [2018-10-23 20:31:05,439 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label17_true-unreach-call.c [2018-10-23 20:31:05,449 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 20:31:05,458 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 20:31:05,476 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 20:31:05,526 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 20:31:05,527 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 20:31:05,527 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 20:31:05,527 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 20:31:05,527 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 20:31:05,528 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 20:31:05,528 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 20:31:05,528 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 20:31:05,528 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 20:31:05,560 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states. [2018-10-23 20:31:05,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-23 20:31:05,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:31:05,572 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] [2018-10-23 20:31:05,575 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:31:05,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:31:05,581 INFO L82 PathProgramCache]: Analyzing trace with hash -344880110, now seen corresponding path program 1 times [2018-10-23 20:31:05,583 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:31:05,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:31:05,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:05,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:31:05,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:31:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:31:06,093 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:31:06,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:31:06,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:31:06,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:31:06,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:31:06,118 INFO L87 Difference]: Start difference. First operand 425 states. Second operand 4 states. [2018-10-23 20:31:17,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:31:17,223 INFO L93 Difference]: Finished difference Result 1474 states and 2723 transitions. [2018-10-23 20:31:17,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:31:17,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2018-10-23 20:31:17,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:31:17,253 INFO L225 Difference]: With dead ends: 1474 [2018-10-23 20:31:17,254 INFO L226 Difference]: Without dead ends: 1042 [2018-10-23 20:31:17,259 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 [2018-10-23 20:31:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2018-10-23 20:31:17,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 1040. [2018-10-23 20:31:17,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1040 states. [2018-10-23 20:31:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1638 transitions. [2018-10-23 20:31:17,363 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1638 transitions. Word has length 64 [2018-10-23 20:31:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:31:17,363 INFO L481 AbstractCegarLoop]: Abstraction has 1040 states and 1638 transitions. [2018-10-23 20:31:17,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:31:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1638 transitions. [2018-10-23 20:31:17,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-23 20:31:17,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:31:17,370 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:31:17,371 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:31:17,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:31:17,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1862007571, now seen corresponding path program 1 times [2018-10-23 20:31:17,372 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:31:17,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:31:17,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:17,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:31:17,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:31:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:31:17,831 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:31:17,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:31:17,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:31:17,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:31:17,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:31:17,834 INFO L87 Difference]: Start difference. First operand 1040 states and 1638 transitions. Second operand 5 states. [2018-10-23 20:31:29,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:31:29,340 INFO L93 Difference]: Finished difference Result 3299 states and 5135 transitions. [2018-10-23 20:31:29,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:31:29,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2018-10-23 20:31:29,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:31:29,355 INFO L225 Difference]: With dead ends: 3299 [2018-10-23 20:31:29,355 INFO L226 Difference]: Without dead ends: 2261 [2018-10-23 20:31:29,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:31:29,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2018-10-23 20:31:29,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1953. [2018-10-23 20:31:29,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1953 states. [2018-10-23 20:31:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2816 transitions. [2018-10-23 20:31:29,492 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2816 transitions. Word has length 130 [2018-10-23 20:31:29,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:31:29,493 INFO L481 AbstractCegarLoop]: Abstraction has 1953 states and 2816 transitions. [2018-10-23 20:31:29,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:31:29,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2816 transitions. [2018-10-23 20:31:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-23 20:31:29,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:31:29,501 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:31:29,501 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:31:29,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:31:29,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1218481597, now seen corresponding path program 1 times [2018-10-23 20:31:29,502 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:31:29,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:31:29,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:29,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:31:29,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:31:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:31:29,895 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:31:29,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:31:29,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:31:29,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:31:29,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:31:29,899 INFO L87 Difference]: Start difference. First operand 1953 states and 2816 transitions. Second operand 4 states. [2018-10-23 20:31:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:31:34,615 INFO L93 Difference]: Finished difference Result 7212 states and 10585 transitions. [2018-10-23 20:31:34,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:31:34,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2018-10-23 20:31:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:31:34,643 INFO L225 Difference]: With dead ends: 7212 [2018-10-23 20:31:34,643 INFO L226 Difference]: Without dead ends: 5261 [2018-10-23 20:31:34,648 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 [2018-10-23 20:31:34,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2018-10-23 20:31:34,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5255. [2018-10-23 20:31:34,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5255 states. [2018-10-23 20:31:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5255 states to 5255 states and 6986 transitions. [2018-10-23 20:31:34,736 INFO L78 Accepts]: Start accepts. Automaton has 5255 states and 6986 transitions. Word has length 135 [2018-10-23 20:31:34,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:31:34,737 INFO L481 AbstractCegarLoop]: Abstraction has 5255 states and 6986 transitions. [2018-10-23 20:31:34,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:31:34,737 INFO L276 IsEmpty]: Start isEmpty. Operand 5255 states and 6986 transitions. [2018-10-23 20:31:34,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-10-23 20:31:34,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:31:34,742 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:31:34,742 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:31:34,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:31:34,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1452802993, now seen corresponding path program 1 times [2018-10-23 20:31:34,742 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:31:34,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:31:34,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:34,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:31:34,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:31:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 123 proven. 4 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-10-23 20:31:35,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:31:35,145 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 [2018-10-23 20:31:35,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:31:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:31:35,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:31:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:31:35,399 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:31:35,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-23 20:31:35,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:31:35,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:31:35,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:31:35,404 INFO L87 Difference]: Start difference. First operand 5255 states and 6986 transitions. Second operand 4 states. [2018-10-23 20:31:40,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:31:40,176 INFO L93 Difference]: Finished difference Result 19280 states and 26028 transitions. [2018-10-23 20:31:40,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:31:40,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 236 [2018-10-23 20:31:40,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:31:40,242 INFO L225 Difference]: With dead ends: 19280 [2018-10-23 20:31:40,242 INFO L226 Difference]: Without dead ends: 14027 [2018-10-23 20:31:40,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:31:40,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14027 states. [2018-10-23 20:31:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14027 to 8857. [2018-10-23 20:31:40,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8857 states. [2018-10-23 20:31:40,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8857 states to 8857 states and 11192 transitions. [2018-10-23 20:31:40,448 INFO L78 Accepts]: Start accepts. Automaton has 8857 states and 11192 transitions. Word has length 236 [2018-10-23 20:31:40,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:31:40,449 INFO L481 AbstractCegarLoop]: Abstraction has 8857 states and 11192 transitions. [2018-10-23 20:31:40,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:31:40,449 INFO L276 IsEmpty]: Start isEmpty. Operand 8857 states and 11192 transitions. [2018-10-23 20:31:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-10-23 20:31:40,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:31:40,458 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:31:40,458 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:31:40,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:31:40,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1564362749, now seen corresponding path program 1 times [2018-10-23 20:31:40,459 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:31:40,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:31:40,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:40,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:31:40,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:31:41,082 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-23 20:31:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-23 20:31:41,274 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:31:41,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:31:41,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:31:41,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:31:41,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:31:41,275 INFO L87 Difference]: Start difference. First operand 8857 states and 11192 transitions. Second operand 5 states. [2018-10-23 20:31:49,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:31:49,077 INFO L93 Difference]: Finished difference Result 19215 states and 24057 transitions. [2018-10-23 20:31:49,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:31:49,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 338 [2018-10-23 20:31:49,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:31:49,111 INFO L225 Difference]: With dead ends: 19215 [2018-10-23 20:31:49,111 INFO L226 Difference]: Without dead ends: 10360 [2018-10-23 20:31:49,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:31:49,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10360 states. [2018-10-23 20:31:49,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10360 to 10057. [2018-10-23 20:31:49,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10057 states. [2018-10-23 20:31:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10057 states to 10057 states and 12448 transitions. [2018-10-23 20:31:49,274 INFO L78 Accepts]: Start accepts. Automaton has 10057 states and 12448 transitions. Word has length 338 [2018-10-23 20:31:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:31:49,275 INFO L481 AbstractCegarLoop]: Abstraction has 10057 states and 12448 transitions. [2018-10-23 20:31:49,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:31:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 10057 states and 12448 transitions. [2018-10-23 20:31:49,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-10-23 20:31:49,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:31:49,287 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:31:49,287 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:31:49,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:31:49,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1832442485, now seen corresponding path program 1 times [2018-10-23 20:31:49,288 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:31:49,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:31:49,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:49,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:31:49,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:31:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-23 20:31:49,727 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:31:49,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:31:49,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:31:49,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:31:49,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:31:49,729 INFO L87 Difference]: Start difference. First operand 10057 states and 12448 transitions. Second operand 4 states. [2018-10-23 20:31:53,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:31:53,909 INFO L93 Difference]: Finished difference Result 25814 states and 32434 transitions. [2018-10-23 20:31:53,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:31:53,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 412 [2018-10-23 20:31:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:31:53,939 INFO L225 Difference]: With dead ends: 25814 [2018-10-23 20:31:53,939 INFO L226 Difference]: Without dead ends: 15759 [2018-10-23 20:31:53,952 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 [2018-10-23 20:31:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15759 states. [2018-10-23 20:31:54,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15759 to 15759. [2018-10-23 20:31:54,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15759 states. [2018-10-23 20:31:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15759 states to 15759 states and 18917 transitions. [2018-10-23 20:31:54,167 INFO L78 Accepts]: Start accepts. Automaton has 15759 states and 18917 transitions. Word has length 412 [2018-10-23 20:31:54,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:31:54,168 INFO L481 AbstractCegarLoop]: Abstraction has 15759 states and 18917 transitions. [2018-10-23 20:31:54,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:31:54,169 INFO L276 IsEmpty]: Start isEmpty. Operand 15759 states and 18917 transitions. [2018-10-23 20:31:54,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2018-10-23 20:31:54,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:31:54,189 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:31:54,189 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:31:54,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:31:54,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1511869154, now seen corresponding path program 1 times [2018-10-23 20:31:54,190 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:31:54,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:31:54,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:54,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:31:54,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:31:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:31:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-23 20:31:55,222 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:31:55,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:31:55,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:31:55,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:31:55,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:31:55,231 INFO L87 Difference]: Start difference. First operand 15759 states and 18917 transitions. Second operand 4 states. [2018-10-23 20:32:01,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:32:01,588 INFO L93 Difference]: Finished difference Result 31518 states and 37839 transitions. [2018-10-23 20:32:01,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:32:01,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2018-10-23 20:32:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:32:01,628 INFO L225 Difference]: With dead ends: 31518 [2018-10-23 20:32:01,629 INFO L226 Difference]: Without dead ends: 15761 [2018-10-23 20:32:01,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:32:01,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15761 states. [2018-10-23 20:32:01,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15761 to 15757. [2018-10-23 20:32:01,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15757 states. [2018-10-23 20:32:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15757 states to 15757 states and 18094 transitions. [2018-10-23 20:32:01,846 INFO L78 Accepts]: Start accepts. Automaton has 15757 states and 18094 transitions. Word has length 497 [2018-10-23 20:32:01,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:32:01,847 INFO L481 AbstractCegarLoop]: Abstraction has 15757 states and 18094 transitions. [2018-10-23 20:32:01,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:32:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 15757 states and 18094 transitions. [2018-10-23 20:32:01,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2018-10-23 20:32:01,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:32:01,867 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:32:01,867 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:32:01,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:32:01,868 INFO L82 PathProgramCache]: Analyzing trace with hash 184151181, now seen corresponding path program 1 times [2018-10-23 20:32:01,868 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:32:01,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:32:01,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:32:01,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:32:01,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:32:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:32:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 544 proven. 4 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2018-10-23 20:32:03,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:32:03,158 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 [2018-10-23 20:32:03,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:32:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:32:03,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:32:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 596 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-23 20:32:03,585 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:32:03,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-23 20:32:03,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 20:32:03,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 20:32:03,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-10-23 20:32:03,587 INFO L87 Difference]: Start difference. First operand 15757 states and 18094 transitions. Second operand 8 states. [2018-10-23 20:32:15,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:32:15,169 INFO L93 Difference]: Finished difference Result 35882 states and 40871 transitions. [2018-10-23 20:32:15,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 20:32:15,170 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 521 [2018-10-23 20:32:15,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:32:15,197 INFO L225 Difference]: With dead ends: 35882 [2018-10-23 20:32:15,197 INFO L226 Difference]: Without dead ends: 16052 [2018-10-23 20:32:15,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 524 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-23 20:32:15,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16052 states. [2018-10-23 20:32:15,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16052 to 15752. [2018-10-23 20:32:15,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2018-10-23 20:32:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 17369 transitions. [2018-10-23 20:32:15,385 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 17369 transitions. Word has length 521 [2018-10-23 20:32:15,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:32:15,385 INFO L481 AbstractCegarLoop]: Abstraction has 15752 states and 17369 transitions. [2018-10-23 20:32:15,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 20:32:15,385 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 17369 transitions. [2018-10-23 20:32:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2018-10-23 20:32:15,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:32:15,400 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:32:15,401 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:32:15,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:32:15,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1576955369, now seen corresponding path program 1 times [2018-10-23 20:32:15,401 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:32:15,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:32:15,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:32:15,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:32:15,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:32:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:32:15,921 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-23 20:32:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 274 proven. 136 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-10-23 20:32:16,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:32:16,398 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-23 20:32:16,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:32:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:32:16,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:32:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-23 20:32:16,852 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:32:16,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2018-10-23 20:32:16,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 20:32:16,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 20:32:16,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 20:32:16,854 INFO L87 Difference]: Start difference. First operand 15752 states and 17369 transitions. Second operand 9 states. [2018-10-23 20:32:20,225 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-10-23 20:32:26,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:32:26,084 INFO L93 Difference]: Finished difference Result 31968 states and 35207 transitions. [2018-10-23 20:32:26,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 20:32:26,084 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 522 [2018-10-23 20:32:26,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:32:26,113 INFO L225 Difference]: With dead ends: 31968 [2018-10-23 20:32:26,113 INFO L226 Difference]: Without dead ends: 16218 [2018-10-23 20:32:26,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 526 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-23 20:32:26,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16218 states. [2018-10-23 20:32:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16218 to 15748. [2018-10-23 20:32:26,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15748 states. [2018-10-23 20:32:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15748 states to 15748 states and 16802 transitions. [2018-10-23 20:32:26,328 INFO L78 Accepts]: Start accepts. Automaton has 15748 states and 16802 transitions. Word has length 522 [2018-10-23 20:32:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:32:26,331 INFO L481 AbstractCegarLoop]: Abstraction has 15748 states and 16802 transitions. [2018-10-23 20:32:26,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 20:32:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 15748 states and 16802 transitions. [2018-10-23 20:32:26,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2018-10-23 20:32:26,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:32:26,347 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:32:26,347 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:32:26,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:32:26,347 INFO L82 PathProgramCache]: Analyzing trace with hash -827615782, now seen corresponding path program 1 times [2018-10-23 20:32:26,348 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:32:26,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:32:26,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:32:26,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:32:26,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:32:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:32:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2018-10-23 20:32:26,890 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:32:26,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:32:26,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:32:26,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:32:26,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:32:26,894 INFO L87 Difference]: Start difference. First operand 15748 states and 16802 transitions. Second operand 3 states. [2018-10-23 20:32:29,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:32:29,474 INFO L93 Difference]: Finished difference Result 37806 states and 40578 transitions. [2018-10-23 20:32:29,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:32:29,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 646 [2018-10-23 20:32:29,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:32:29,502 INFO L225 Difference]: With dead ends: 37806 [2018-10-23 20:32:29,502 INFO L226 Difference]: Without dead ends: 22060 [2018-10-23 20:32:29,515 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 [2018-10-23 20:32:29,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22060 states. [2018-10-23 20:32:29,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22060 to 22050. [2018-10-23 20:32:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22050 states. [2018-10-23 20:32:29,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22050 states to 22050 states and 23457 transitions. [2018-10-23 20:32:29,981 INFO L78 Accepts]: Start accepts. Automaton has 22050 states and 23457 transitions. Word has length 646 [2018-10-23 20:32:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:32:29,982 INFO L481 AbstractCegarLoop]: Abstraction has 22050 states and 23457 transitions. [2018-10-23 20:32:29,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:32:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 22050 states and 23457 transitions. [2018-10-23 20:32:30,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2018-10-23 20:32:30,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:32:30,003 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, 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, 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, 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] [2018-10-23 20:32:30,003 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:32:30,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:32:30,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2126414506, now seen corresponding path program 1 times [2018-10-23 20:32:30,003 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:32:30,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:32:30,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:32:30,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:32:30,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:32:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:32:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2018-10-23 20:32:30,579 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:32:30,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 20:32:30,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:32:30,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:32:30,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:32:30,580 INFO L87 Difference]: Start difference. First operand 22050 states and 23457 transitions. Second operand 5 states. [2018-10-23 20:32:35,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:32:35,602 INFO L93 Difference]: Finished difference Result 59420 states and 63256 transitions. [2018-10-23 20:32:35,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:32:35,603 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 692 [2018-10-23 20:32:35,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:32:35,641 INFO L225 Difference]: With dead ends: 59420 [2018-10-23 20:32:35,641 INFO L226 Difference]: Without dead ends: 37372 [2018-10-23 20:32:35,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:32:35,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37372 states. [2018-10-23 20:32:36,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37372 to 28947. [2018-10-23 20:32:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28947 states. [2018-10-23 20:32:36,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28947 states to 28947 states and 30573 transitions. [2018-10-23 20:32:36,040 INFO L78 Accepts]: Start accepts. Automaton has 28947 states and 30573 transitions. Word has length 692 [2018-10-23 20:32:36,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:32:36,041 INFO L481 AbstractCegarLoop]: Abstraction has 28947 states and 30573 transitions. [2018-10-23 20:32:36,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:32:36,042 INFO L276 IsEmpty]: Start isEmpty. Operand 28947 states and 30573 transitions. [2018-10-23 20:32:36,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 723 [2018-10-23 20:32:36,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:32:36,070 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:32:36,071 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:32:36,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:32:36,071 INFO L82 PathProgramCache]: Analyzing trace with hash 386069199, now seen corresponding path program 1 times [2018-10-23 20:32:36,071 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:32:36,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:32:36,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:32:36,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:32:36,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:32:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:32:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 424 proven. 306 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2018-10-23 20:32:37,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:32:37,365 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 [2018-10-23 20:32:37,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:32:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:32:37,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:32:38,040 WARN L179 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2018-10-23 20:32:45,102 WARN L179 SmtUtils]: Spent 4.66 s on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2018-10-23 20:32:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2018-10-23 20:32:46,416 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:32:46,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2018-10-23 20:32:46,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 20:32:46,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 20:32:46,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=28, Unknown=1, NotChecked=0, Total=42 [2018-10-23 20:32:46,418 INFO L87 Difference]: Start difference. First operand 28947 states and 30573 transitions. Second operand 7 states. Received shutdown request... [2018-10-23 20:35:07,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:35:07,383 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 20:35:07,388 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 20:35:07,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:35:07 BoogieIcfgContainer [2018-10-23 20:35:07,388 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 20:35:07,389 INFO L168 Benchmark]: Toolchain (without parser) took 251488.44 ms. Allocated memory was 1.5 GB in the beginning and 3.7 GB in the end (delta: 2.2 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.7 GB). Peak memory consumption was 436.0 MB. Max. memory is 7.1 GB. [2018-10-23 20:35:07,390 INFO L168 Benchmark]: CDTParser took 0.21 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. [2018-10-23 20:35:07,391 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1248.96 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-10-23 20:35:07,391 INFO L168 Benchmark]: Boogie Procedure Inliner took 379.03 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 774.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -895.8 MB). Peak memory consumption was 33.4 MB. Max. memory is 7.1 GB. [2018-10-23 20:35:07,392 INFO L168 Benchmark]: Boogie Preprocessor took 263.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 40.5 MB). Peak memory consumption was 40.5 MB. Max. memory is 7.1 GB. [2018-10-23 20:35:07,393 INFO L168 Benchmark]: RCFGBuilder took 7634.86 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 305.9 MB). Peak memory consumption was 305.9 MB. Max. memory is 7.1 GB. [2018-10-23 20:35:07,394 INFO L168 Benchmark]: TraceAbstraction took 241957.05 ms. Allocated memory was 2.3 GB in the beginning and 3.7 GB in the end (delta: 1.4 GB). Free memory was 1.9 GB in the beginning and 3.2 GB in the end (delta: -1.3 GB). Peak memory consumption was 105.4 MB. Max. memory is 7.1 GB. [2018-10-23 20:35:07,399 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 1248.96 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 379.03 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 774.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -895.8 MB). Peak memory consumption was 33.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 263.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 40.5 MB). Peak memory consumption was 40.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7634.86 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 305.9 MB). Peak memory consumption was 305.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 241957.05 ms. Allocated memory was 2.3 GB in the beginning and 3.7 GB in the end (delta: 1.4 GB). Free memory was 1.9 GB in the beginning and 3.2 GB in the end (delta: -1.3 GB). Peak memory consumption was 105.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 196]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 196). Cancelled while BasicCegarLoop was constructing difference of abstraction (28947states) and FLOYD_HOARE automaton (currently 4 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (135 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 425 locations, 1 error locations. TIMEOUT Result, 241.8s OverallTime, 12 OverallIterations, 5 TraceHistogramMax, 220.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3644 SDtfs, 12972 SDslu, 2030 SDs, 0 SdLazy, 26969 SolverSat, 4933 SolverUnsat, 72 SolverUnknown, 0 SolverNotchecked, 209.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2075 GetRequests, 2018 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 10.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28947occurred in iteration=11, 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: 2.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 14998 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 14.4s InterpolantComputationTime, 6916 NumberOfCodeBlocks, 6916 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 6900 ConstructedInterpolants, 142 QuantifiedInterpolants, 16273982 SizeOfPredicates, 1 NumberOfNonLiveVariables, 2456 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 16 InterpolantComputations, 12 PerfectInterpolantSequences, 6557/7007 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown