java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_2_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 22:33:14,880 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 22:33:14,884 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 22:33:14,901 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 22:33:14,901 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 22:33:14,902 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 22:33:14,904 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 22:33:14,907 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 22:33:14,908 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 22:33:14,910 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 22:33:14,913 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 22:33:14,913 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 22:33:14,914 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 22:33:14,915 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 22:33:14,918 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 22:33:14,926 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 22:33:14,927 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 22:33:14,929 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 22:33:14,933 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 22:33:14,937 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 22:33:14,938 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 22:33:14,939 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 22:33:14,942 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-26 22:33:14,955 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 [2018-10-26 22:33:14,972 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 22:33:14,972 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 22:33:14,973 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 22:33:14,973 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 22:33:14,974 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 22:33:14,974 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 22:33:14,974 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 22:33:14,974 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 22:33:14,974 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 22:33:14,975 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 22:33:14,975 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 22:33:14,975 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 22:33:14,975 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 22:33:14,975 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 22:33:14,975 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 22:33:14,976 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 22:33:14,976 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 22:33:14,976 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 22:33:14,976 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 22:33:14,976 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 22:33:14,977 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 22:33:14,977 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 22:33:14,977 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 22:33:14,977 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 22:33:14,977 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 22:33:14,977 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 22:33:14,978 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 22:33:14,978 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 22:33:15,023 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 22:33:15,039 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 22:33:15,044 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 22:33:15,046 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 22:33:15,046 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 22:33:15,047 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/count_by_2_true-unreach-call_true-termination.i [2018-10-26 22:33:15,120 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/70bb305ff/4a3196ff650c43c288065803353f1b0e/FLAG687ff8fc6 [2018-10-26 22:33:15,627 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 22:33:15,627 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2_true-unreach-call_true-termination.i [2018-10-26 22:33:15,633 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/70bb305ff/4a3196ff650c43c288065803353f1b0e/FLAG687ff8fc6 [2018-10-26 22:33:15,647 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/70bb305ff/4a3196ff650c43c288065803353f1b0e [2018-10-26 22:33:15,656 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 22:33:15,658 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 22:33:15,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 22:33:15,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 22:33:15,663 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 22:33:15,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:33:15" (1/1) ... [2018-10-26 22:33:15,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e1527d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:15, skipping insertion in model container [2018-10-26 22:33:15,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:33:15" (1/1) ... [2018-10-26 22:33:15,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 22:33:15,703 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 22:33:15,898 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:33:15,902 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 22:33:15,918 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:33:15,933 INFO L193 MainTranslator]: Completed translation [2018-10-26 22:33:15,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:15 WrapperNode [2018-10-26 22:33:15,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 22:33:15,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 22:33:15,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 22:33:15,935 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 22:33:15,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:15" (1/1) ... [2018-10-26 22:33:15,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:15" (1/1) ... [2018-10-26 22:33:15,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 22:33:15,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 22:33:15,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 22:33:15,970 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 22:33:15,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:15" (1/1) ... [2018-10-26 22:33:15,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:15" (1/1) ... [2018-10-26 22:33:15,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:15" (1/1) ... [2018-10-26 22:33:15,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:15" (1/1) ... [2018-10-26 22:33:15,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:15" (1/1) ... [2018-10-26 22:33:15,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:15" (1/1) ... [2018-10-26 22:33:15,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:15" (1/1) ... [2018-10-26 22:33:15,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 22:33:15,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 22:33:15,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 22:33:15,987 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 22:33:15,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:15" (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 [2018-10-26 22:33:16,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 22:33:16,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 22:33:16,260 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 22:33:16,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:33:16 BoogieIcfgContainer [2018-10-26 22:33:16,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 22:33:16,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 22:33:16,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 22:33:16,265 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 22:33:16,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:33:15" (1/3) ... [2018-10-26 22:33:16,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e6d04a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:33:16, skipping insertion in model container [2018-10-26 22:33:16,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:33:15" (2/3) ... [2018-10-26 22:33:16,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e6d04a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:33:16, skipping insertion in model container [2018-10-26 22:33:16,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:33:16" (3/3) ... [2018-10-26 22:33:16,269 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_2_true-unreach-call_true-termination.i [2018-10-26 22:33:16,279 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 22:33:16,286 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 22:33:16,304 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 22:33:16,334 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 22:33:16,335 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 22:33:16,335 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 22:33:16,335 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 22:33:16,335 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 22:33:16,335 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 22:33:16,335 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 22:33:16,336 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 22:33:16,336 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 22:33:16,351 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-10-26 22:33:16,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-26 22:33:16,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:16,358 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-26 22:33:16,361 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:16,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:16,367 INFO L82 PathProgramCache]: Analyzing trace with hash 889814567, now seen corresponding path program 1 times [2018-10-26 22:33:16,371 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:16,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:16,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:16,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:16,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:16,484 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:33:16,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 22:33:16,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 22:33:16,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 22:33:16,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 22:33:16,502 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-10-26 22:33:16,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:16,520 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-10-26 22:33:16,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 22:33:16,522 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-26 22:33:16,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:16,534 INFO L225 Difference]: With dead ends: 21 [2018-10-26 22:33:16,534 INFO L226 Difference]: Without dead ends: 9 [2018-10-26 22:33:16,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 22:33:16,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-26 22:33:16,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-26 22:33:16,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-26 22:33:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-26 22:33:16,575 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-26 22:33:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:16,576 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-26 22:33:16,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 22:33:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-26 22:33:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-26 22:33:16,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:16,577 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:16,577 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:16,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:16,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1805894861, now seen corresponding path program 1 times [2018-10-26 22:33:16,578 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:16,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:16,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:16,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:16,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:16,670 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:33:16,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 22:33:16,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 22:33:16,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 22:33:16,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 22:33:16,675 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2018-10-26 22:33:16,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:16,772 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-26 22:33:16,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 22:33:16,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-26 22:33:16,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:16,777 INFO L225 Difference]: With dead ends: 16 [2018-10-26 22:33:16,777 INFO L226 Difference]: Without dead ends: 12 [2018-10-26 22:33:16,779 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 [2018-10-26 22:33:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-26 22:33:16,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-10-26 22:33:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-26 22:33:16,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-26 22:33:16,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2018-10-26 22:33:16,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:16,786 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-26 22:33:16,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 22:33:16,786 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-26 22:33:16,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 22:33:16,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:16,787 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:16,787 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:16,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:16,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1994321781, now seen corresponding path program 1 times [2018-10-26 22:33:16,791 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:16,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:16,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:16,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:16,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:16,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:16,958 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 [2018-10-26 22:33:16,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:17,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:17,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:17,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-26 22:33:17,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 22:33:17,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 22:33:17,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 22:33:17,071 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-10-26 22:33:17,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:17,143 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-26 22:33:17,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 22:33:17,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-26 22:33:17,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:17,145 INFO L225 Difference]: With dead ends: 19 [2018-10-26 22:33:17,145 INFO L226 Difference]: Without dead ends: 15 [2018-10-26 22:33:17,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 22:33:17,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-26 22:33:17,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-10-26 22:33:17,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-26 22:33:17,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-26 22:33:17,153 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2018-10-26 22:33:17,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:17,153 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-26 22:33:17,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 22:33:17,153 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-26 22:33:17,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 22:33:17,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:17,156 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:17,156 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:17,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:17,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1089618957, now seen corresponding path program 2 times [2018-10-26 22:33:17,158 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:17,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:17,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:17,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:17,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:17,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:17,241 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 [2018-10-26 22:33:17,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:33:17,271 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:33:17,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:17,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:17,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:17,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-26 22:33:17,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:33:17,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:33:17,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:33:17,304 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2018-10-26 22:33:17,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:17,383 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-26 22:33:17,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:33:17,384 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-26 22:33:17,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:17,385 INFO L225 Difference]: With dead ends: 22 [2018-10-26 22:33:17,385 INFO L226 Difference]: Without dead ends: 18 [2018-10-26 22:33:17,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:33:17,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-26 22:33:17,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-26 22:33:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-26 22:33:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-26 22:33:17,390 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2018-10-26 22:33:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:17,390 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-26 22:33:17,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:33:17,391 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-26 22:33:17,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-26 22:33:17,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:17,391 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:17,392 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:17,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:17,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1122715979, now seen corresponding path program 3 times [2018-10-26 22:33:17,392 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:17,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:17,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:17,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:17,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:17,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:17,542 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 [2018-10-26 22:33:17,557 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:17,586 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 22:33:17,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:17,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:17,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:17,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-26 22:33:17,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 22:33:17,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 22:33:17,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 22:33:17,626 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2018-10-26 22:33:17,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:17,810 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-26 22:33:17,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 22:33:17,810 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-10-26 22:33:17,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:17,811 INFO L225 Difference]: With dead ends: 25 [2018-10-26 22:33:17,811 INFO L226 Difference]: Without dead ends: 21 [2018-10-26 22:33:17,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 22:33:17,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-26 22:33:17,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-10-26 22:33:17,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-26 22:33:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-26 22:33:17,816 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-10-26 22:33:17,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:17,816 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-26 22:33:17,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 22:33:17,817 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-26 22:33:17,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-26 22:33:17,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:17,817 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:17,818 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:17,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:17,818 INFO L82 PathProgramCache]: Analyzing trace with hash -726379699, now seen corresponding path program 4 times [2018-10-26 22:33:17,819 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:17,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:17,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:17,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:17,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:17,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:17,991 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 [2018-10-26 22:33:18,000 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:33:18,009 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:33:18,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:18,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:18,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:18,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-26 22:33:18,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 22:33:18,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 22:33:18,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:33:18,050 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2018-10-26 22:33:18,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:18,102 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-26 22:33:18,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 22:33:18,103 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-10-26 22:33:18,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:18,104 INFO L225 Difference]: With dead ends: 28 [2018-10-26 22:33:18,104 INFO L226 Difference]: Without dead ends: 24 [2018-10-26 22:33:18,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:33:18,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-26 22:33:18,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-10-26 22:33:18,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-26 22:33:18,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-26 22:33:18,109 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2018-10-26 22:33:18,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:18,109 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-26 22:33:18,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 22:33:18,110 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-26 22:33:18,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-26 22:33:18,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:18,111 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:18,111 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:18,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:18,111 INFO L82 PathProgramCache]: Analyzing trace with hash 114815499, now seen corresponding path program 5 times [2018-10-26 22:33:18,112 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:18,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:18,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:18,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:18,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:18,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:18,356 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:18,365 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:33:18,380 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-26 22:33:18,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:18,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:18,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:18,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-26 22:33:18,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 22:33:18,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 22:33:18,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-26 22:33:18,420 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 8 states. [2018-10-26 22:33:18,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:18,482 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-26 22:33:18,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 22:33:18,484 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-10-26 22:33:18,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:18,485 INFO L225 Difference]: With dead ends: 31 [2018-10-26 22:33:18,485 INFO L226 Difference]: Without dead ends: 27 [2018-10-26 22:33:18,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-26 22:33:18,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-26 22:33:18,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-10-26 22:33:18,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-26 22:33:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-26 22:33:18,490 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2018-10-26 22:33:18,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:18,490 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-26 22:33:18,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 22:33:18,490 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-26 22:33:18,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-26 22:33:18,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:18,491 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:18,492 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:18,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:18,492 INFO L82 PathProgramCache]: Analyzing trace with hash -973213043, now seen corresponding path program 6 times [2018-10-26 22:33:18,492 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:18,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:18,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:18,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:18,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:18,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:18,639 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:18,653 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:33:18,663 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-26 22:33:18,664 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:18,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:18,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:18,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-26 22:33:18,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 22:33:18,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 22:33:18,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:33:18,700 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2018-10-26 22:33:18,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:18,959 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-26 22:33:18,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 22:33:18,960 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-10-26 22:33:18,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:18,961 INFO L225 Difference]: With dead ends: 34 [2018-10-26 22:33:18,961 INFO L226 Difference]: Without dead ends: 30 [2018-10-26 22:33:18,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:33:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-26 22:33:18,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-26 22:33:18,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-26 22:33:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-26 22:33:18,972 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-10-26 22:33:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:18,973 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-26 22:33:18,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 22:33:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-26 22:33:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-26 22:33:18,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:18,975 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:18,975 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:18,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:18,975 INFO L82 PathProgramCache]: Analyzing trace with hash -313324853, now seen corresponding path program 7 times [2018-10-26 22:33:18,976 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:18,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:18,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:18,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:18,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:19,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:19,272 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:19,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:19,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:19,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:19,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-26 22:33:19,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 22:33:19,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 22:33:19,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-26 22:33:19,324 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 10 states. [2018-10-26 22:33:19,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:19,390 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-26 22:33:19,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 22:33:19,390 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-10-26 22:33:19,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:19,391 INFO L225 Difference]: With dead ends: 37 [2018-10-26 22:33:19,391 INFO L226 Difference]: Without dead ends: 33 [2018-10-26 22:33:19,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-26 22:33:19,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-26 22:33:19,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-10-26 22:33:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-26 22:33:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-26 22:33:19,396 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-10-26 22:33:19,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:19,397 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-26 22:33:19,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 22:33:19,397 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-26 22:33:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-26 22:33:19,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:19,399 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:19,399 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:19,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:19,400 INFO L82 PathProgramCache]: Analyzing trace with hash 350429645, now seen corresponding path program 8 times [2018-10-26 22:33:19,400 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:19,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:19,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:19,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:19,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:19,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:19,654 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:19,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:33:19,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:33:19,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:19,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:19,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:19,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-26 22:33:19,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 22:33:19,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 22:33:19,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-26 22:33:19,732 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2018-10-26 22:33:19,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:19,817 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-26 22:33:19,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 22:33:19,818 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-10-26 22:33:19,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:19,819 INFO L225 Difference]: With dead ends: 40 [2018-10-26 22:33:19,819 INFO L226 Difference]: Without dead ends: 36 [2018-10-26 22:33:19,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-26 22:33:19,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-26 22:33:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-26 22:33:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-26 22:33:19,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-26 22:33:19,824 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-10-26 22:33:19,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:19,824 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-26 22:33:19,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 22:33:19,825 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-26 22:33:19,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-26 22:33:19,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:19,826 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:19,826 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:19,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:19,827 INFO L82 PathProgramCache]: Analyzing trace with hash 231248779, now seen corresponding path program 9 times [2018-10-26 22:33:19,827 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:19,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:19,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:19,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:19,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:20,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:20,148 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:20,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:20,172 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-26 22:33:20,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:20,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:20,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:20,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-26 22:33:20,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 22:33:20,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 22:33:20,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 22:33:20,210 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 12 states. [2018-10-26 22:33:20,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:20,573 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-26 22:33:20,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 22:33:20,574 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-10-26 22:33:20,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:20,575 INFO L225 Difference]: With dead ends: 43 [2018-10-26 22:33:20,575 INFO L226 Difference]: Without dead ends: 39 [2018-10-26 22:33:20,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 22:33:20,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-26 22:33:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-10-26 22:33:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-26 22:33:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-26 22:33:20,583 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-10-26 22:33:20,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:20,588 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-26 22:33:20,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 22:33:20,588 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-26 22:33:20,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-26 22:33:20,589 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:20,589 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:20,590 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:20,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:20,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1652023565, now seen corresponding path program 10 times [2018-10-26 22:33:20,590 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:20,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:20,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:20,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:20,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:20,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:20,808 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:20,817 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:33:20,852 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:33:20,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:20,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:20,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:20,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-26 22:33:20,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 22:33:20,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 22:33:20,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-26 22:33:20,891 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 13 states. [2018-10-26 22:33:20,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:20,961 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-26 22:33:20,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 22:33:20,962 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-10-26 22:33:20,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:20,963 INFO L225 Difference]: With dead ends: 46 [2018-10-26 22:33:20,963 INFO L226 Difference]: Without dead ends: 42 [2018-10-26 22:33:20,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-26 22:33:20,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-26 22:33:20,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-26 22:33:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-26 22:33:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-26 22:33:20,969 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-10-26 22:33:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:20,970 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-26 22:33:20,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 22:33:20,970 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-26 22:33:20,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-26 22:33:20,971 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:20,971 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:20,971 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:20,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:20,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1050971211, now seen corresponding path program 11 times [2018-10-26 22:33:20,972 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:20,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:20,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:20,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:20,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:21,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:21,149 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:21,157 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:33:21,216 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-26 22:33:21,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:21,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:21,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:21,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-26 22:33:21,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-26 22:33:21,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-26 22:33:21,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-26 22:33:21,261 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 14 states. [2018-10-26 22:33:21,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:21,344 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-26 22:33:21,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 22:33:21,345 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2018-10-26 22:33:21,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:21,346 INFO L225 Difference]: With dead ends: 49 [2018-10-26 22:33:21,346 INFO L226 Difference]: Without dead ends: 45 [2018-10-26 22:33:21,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-26 22:33:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-26 22:33:21,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-26 22:33:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-26 22:33:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-26 22:33:21,351 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-10-26 22:33:21,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:21,352 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-26 22:33:21,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-26 22:33:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-26 22:33:21,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-26 22:33:21,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:21,353 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:21,353 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:21,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:21,353 INFO L82 PathProgramCache]: Analyzing trace with hash 818950221, now seen corresponding path program 12 times [2018-10-26 22:33:21,354 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:21,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:21,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:21,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:21,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:21,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:21,571 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:21,582 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:33:21,610 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-26 22:33:21,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:21,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:21,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:21,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-26 22:33:21,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-26 22:33:21,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-26 22:33:21,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-26 22:33:21,650 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 15 states. [2018-10-26 22:33:21,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:21,747 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-26 22:33:21,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 22:33:21,747 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-10-26 22:33:21,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:21,748 INFO L225 Difference]: With dead ends: 52 [2018-10-26 22:33:21,749 INFO L226 Difference]: Without dead ends: 48 [2018-10-26 22:33:21,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-26 22:33:21,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-26 22:33:21,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-10-26 22:33:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-26 22:33:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-26 22:33:21,755 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-10-26 22:33:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:21,756 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-26 22:33:21,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-26 22:33:21,756 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-26 22:33:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-26 22:33:21,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:21,757 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:21,757 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:21,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:21,758 INFO L82 PathProgramCache]: Analyzing trace with hash -715983605, now seen corresponding path program 13 times [2018-10-26 22:33:21,758 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:21,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:21,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:21,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:21,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:21,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:21,952 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:21,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:21,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:22,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:22,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-26 22:33:22,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 22:33:22,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 22:33:22,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-26 22:33:22,010 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 16 states. [2018-10-26 22:33:22,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:22,121 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-26 22:33:22,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-26 22:33:22,122 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2018-10-26 22:33:22,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:22,123 INFO L225 Difference]: With dead ends: 55 [2018-10-26 22:33:22,123 INFO L226 Difference]: Without dead ends: 51 [2018-10-26 22:33:22,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-26 22:33:22,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-26 22:33:22,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-10-26 22:33:22,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-26 22:33:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-26 22:33:22,128 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-10-26 22:33:22,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:22,129 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-26 22:33:22,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 22:33:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-26 22:33:22,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-26 22:33:22,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:22,132 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:22,132 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:22,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:22,133 INFO L82 PathProgramCache]: Analyzing trace with hash 587206541, now seen corresponding path program 14 times [2018-10-26 22:33:22,133 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:22,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:22,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:22,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:22,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:22,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:22,372 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:22,382 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:33:22,415 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:33:22,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:22,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:22,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:22,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-26 22:33:22,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 22:33:22,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 22:33:22,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:33:22,460 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 17 states. [2018-10-26 22:33:22,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:22,534 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-26 22:33:22,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 22:33:22,534 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-10-26 22:33:22,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:22,535 INFO L225 Difference]: With dead ends: 58 [2018-10-26 22:33:22,536 INFO L226 Difference]: Without dead ends: 54 [2018-10-26 22:33:22,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:33:22,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-26 22:33:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-10-26 22:33:22,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-26 22:33:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-26 22:33:22,541 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-10-26 22:33:22,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:22,542 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-26 22:33:22,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 22:33:22,542 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-26 22:33:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-26 22:33:22,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:22,543 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:22,544 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:22,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:22,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1715457483, now seen corresponding path program 15 times [2018-10-26 22:33:22,544 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:22,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:22,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:22,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:22,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:22,819 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:22,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:22,819 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:22,826 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:22,842 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-26 22:33:22,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:22,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:22,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:22,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-26 22:33:22,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-26 22:33:22,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-26 22:33:22,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-26 22:33:22,881 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 18 states. [2018-10-26 22:33:23,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:23,082 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-26 22:33:23,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-26 22:33:23,083 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-26 22:33:23,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:23,084 INFO L225 Difference]: With dead ends: 61 [2018-10-26 22:33:23,084 INFO L226 Difference]: Without dead ends: 57 [2018-10-26 22:33:23,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-26 22:33:23,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-26 22:33:23,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-10-26 22:33:23,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-26 22:33:23,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-26 22:33:23,096 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-10-26 22:33:23,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:23,097 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-26 22:33:23,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-26 22:33:23,097 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-26 22:33:23,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-26 22:33:23,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:23,098 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:23,098 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:23,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:23,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1025212109, now seen corresponding path program 16 times [2018-10-26 22:33:23,099 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:23,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:23,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:23,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:23,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:23,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:23,509 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:23,521 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:33:23,542 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:33:23,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:23,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:23,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:23,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-26 22:33:23,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-26 22:33:23,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-26 22:33:23,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-26 22:33:23,590 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 19 states. [2018-10-26 22:33:23,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:23,700 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-26 22:33:23,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-26 22:33:23,701 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-10-26 22:33:23,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:23,702 INFO L225 Difference]: With dead ends: 64 [2018-10-26 22:33:23,702 INFO L226 Difference]: Without dead ends: 60 [2018-10-26 22:33:23,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-26 22:33:23,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-26 22:33:23,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-10-26 22:33:23,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-26 22:33:23,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-26 22:33:23,707 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-10-26 22:33:23,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:23,707 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-26 22:33:23,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-26 22:33:23,708 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-26 22:33:23,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-26 22:33:23,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:23,709 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:23,709 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:23,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:23,709 INFO L82 PathProgramCache]: Analyzing trace with hash -2066278773, now seen corresponding path program 17 times [2018-10-26 22:33:23,709 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:23,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:23,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:23,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:23,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:23,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:23,919 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:23,927 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:33:23,954 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-26 22:33:23,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:23,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:23,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:23,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-26 22:33:23,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-26 22:33:23,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-26 22:33:23,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:33:23,997 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 20 states. [2018-10-26 22:33:24,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:24,084 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-26 22:33:24,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 22:33:24,085 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2018-10-26 22:33:24,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:24,085 INFO L225 Difference]: With dead ends: 67 [2018-10-26 22:33:24,086 INFO L226 Difference]: Without dead ends: 63 [2018-10-26 22:33:24,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:33:24,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-26 22:33:24,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-10-26 22:33:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-26 22:33:24,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-26 22:33:24,091 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2018-10-26 22:33:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:24,091 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-26 22:33:24,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-26 22:33:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-26 22:33:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-26 22:33:24,092 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:24,092 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:24,092 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:24,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:24,093 INFO L82 PathProgramCache]: Analyzing trace with hash 607550989, now seen corresponding path program 18 times [2018-10-26 22:33:24,093 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:24,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:24,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:24,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:24,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:24,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:24,575 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:24,586 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:33:24,620 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-26 22:33:24,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:24,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:24,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:24,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-26 22:33:24,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-26 22:33:24,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-26 22:33:24,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-26 22:33:24,667 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 21 states. [2018-10-26 22:33:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:24,889 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-26 22:33:24,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-26 22:33:24,890 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2018-10-26 22:33:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:24,890 INFO L225 Difference]: With dead ends: 70 [2018-10-26 22:33:24,891 INFO L226 Difference]: Without dead ends: 66 [2018-10-26 22:33:24,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-26 22:33:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-26 22:33:24,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-10-26 22:33:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-26 22:33:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-26 22:33:24,895 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2018-10-26 22:33:24,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:24,896 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-26 22:33:24,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-26 22:33:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-26 22:33:24,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-26 22:33:24,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:24,897 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:24,897 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:24,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:24,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2088448181, now seen corresponding path program 19 times [2018-10-26 22:33:24,898 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:24,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:24,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:24,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:24,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:25,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:25,375 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:25,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:25,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:25,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:25,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-26 22:33:25,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-26 22:33:25,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-26 22:33:25,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-26 22:33:25,433 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 22 states. [2018-10-26 22:33:25,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:25,670 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-26 22:33:25,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-26 22:33:25,671 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2018-10-26 22:33:25,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:25,672 INFO L225 Difference]: With dead ends: 73 [2018-10-26 22:33:25,672 INFO L226 Difference]: Without dead ends: 69 [2018-10-26 22:33:25,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-26 22:33:25,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-26 22:33:25,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-10-26 22:33:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-26 22:33:25,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-26 22:33:25,678 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2018-10-26 22:33:25,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:25,678 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-26 22:33:25,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-26 22:33:25,678 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-26 22:33:25,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-26 22:33:25,679 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:25,679 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:25,679 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:25,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:25,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1583680845, now seen corresponding path program 20 times [2018-10-26 22:33:25,680 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:25,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:25,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:25,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:25,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:26,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:26,015 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:26,026 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:33:26,040 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:33:26,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:26,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:26,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:26,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-26 22:33:26,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-26 22:33:26,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-26 22:33:26,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-26 22:33:26,089 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 23 states. [2018-10-26 22:33:26,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:26,237 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-26 22:33:26,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-26 22:33:26,239 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2018-10-26 22:33:26,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:26,240 INFO L225 Difference]: With dead ends: 76 [2018-10-26 22:33:26,240 INFO L226 Difference]: Without dead ends: 72 [2018-10-26 22:33:26,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-26 22:33:26,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-26 22:33:26,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-10-26 22:33:26,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-26 22:33:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-26 22:33:26,244 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2018-10-26 22:33:26,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:26,244 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-26 22:33:26,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-26 22:33:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-26 22:33:26,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-26 22:33:26,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:26,245 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:26,245 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:26,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:26,246 INFO L82 PathProgramCache]: Analyzing trace with hash 867497995, now seen corresponding path program 21 times [2018-10-26 22:33:26,246 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:26,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:26,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:26,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:26,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:26,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:26,640 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:26,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:26,671 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-26 22:33:26,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:26,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:26,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:26,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-26 22:33:26,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-26 22:33:26,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-26 22:33:26,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-26 22:33:26,719 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 24 states. [2018-10-26 22:33:26,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:26,843 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-26 22:33:26,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-26 22:33:26,843 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2018-10-26 22:33:26,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:26,844 INFO L225 Difference]: With dead ends: 79 [2018-10-26 22:33:26,844 INFO L226 Difference]: Without dead ends: 75 [2018-10-26 22:33:26,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-26 22:33:26,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-26 22:33:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-10-26 22:33:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-26 22:33:26,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-26 22:33:26,847 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2018-10-26 22:33:26,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:26,848 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-26 22:33:26,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-26 22:33:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-26 22:33:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-26 22:33:26,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:26,849 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:26,849 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:26,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:26,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1833227123, now seen corresponding path program 22 times [2018-10-26 22:33:26,849 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:26,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:26,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:26,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:26,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:27,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:27,380 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:27,388 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:33:27,402 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:33:27,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:27,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:27,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:27,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-26 22:33:27,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-26 22:33:27,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-26 22:33:27,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-26 22:33:27,450 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 25 states. [2018-10-26 22:33:27,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:27,640 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-26 22:33:27,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-26 22:33:27,641 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-10-26 22:33:27,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:27,642 INFO L225 Difference]: With dead ends: 82 [2018-10-26 22:33:27,642 INFO L226 Difference]: Without dead ends: 78 [2018-10-26 22:33:27,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-26 22:33:27,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-26 22:33:27,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-10-26 22:33:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-26 22:33:27,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-26 22:33:27,645 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2018-10-26 22:33:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:27,646 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-26 22:33:27,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-26 22:33:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-26 22:33:27,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-26 22:33:27,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:27,647 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:27,647 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:27,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:27,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1512861493, now seen corresponding path program 23 times [2018-10-26 22:33:27,647 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:27,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:27,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:27,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:27,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:28,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:28,150 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:28,157 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:33:28,177 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-26 22:33:28,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:28,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:28,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:28,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-26 22:33:28,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-26 22:33:28,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-26 22:33:28,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:33:28,223 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 26 states. [2018-10-26 22:33:28,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:28,388 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-26 22:33:28,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-26 22:33:28,389 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 76 [2018-10-26 22:33:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:28,389 INFO L225 Difference]: With dead ends: 85 [2018-10-26 22:33:28,390 INFO L226 Difference]: Without dead ends: 81 [2018-10-26 22:33:28,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:33:28,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-26 22:33:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2018-10-26 22:33:28,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-26 22:33:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-26 22:33:28,393 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2018-10-26 22:33:28,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:28,393 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-26 22:33:28,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-26 22:33:28,394 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-26 22:33:28,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-26 22:33:28,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:28,395 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:28,395 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:28,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:28,395 INFO L82 PathProgramCache]: Analyzing trace with hash -917709875, now seen corresponding path program 24 times [2018-10-26 22:33:28,395 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:28,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:28,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:28,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:28,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:29,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:29,154 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:29,161 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:33:29,185 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-26 22:33:29,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:29,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:29,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:29,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-26 22:33:29,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-26 22:33:29,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-26 22:33:29,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-26 22:33:29,251 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 27 states. [2018-10-26 22:33:29,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:29,396 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-26 22:33:29,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-26 22:33:29,396 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2018-10-26 22:33:29,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:29,397 INFO L225 Difference]: With dead ends: 88 [2018-10-26 22:33:29,397 INFO L226 Difference]: Without dead ends: 84 [2018-10-26 22:33:29,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-26 22:33:29,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-26 22:33:29,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2018-10-26 22:33:29,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-26 22:33:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-26 22:33:29,400 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2018-10-26 22:33:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:29,401 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-26 22:33:29,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-26 22:33:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-26 22:33:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-26 22:33:29,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:29,402 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:29,402 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:29,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:29,402 INFO L82 PathProgramCache]: Analyzing trace with hash -380855925, now seen corresponding path program 25 times [2018-10-26 22:33:29,402 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:29,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:29,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:29,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:29,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:30,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:30,207 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:30,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:30,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:30,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:30,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-26 22:33:30,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-26 22:33:30,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-26 22:33:30,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-26 22:33:30,288 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 28 states. [2018-10-26 22:33:30,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:30,416 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-26 22:33:30,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-26 22:33:30,417 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 82 [2018-10-26 22:33:30,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:30,418 INFO L225 Difference]: With dead ends: 91 [2018-10-26 22:33:30,418 INFO L226 Difference]: Without dead ends: 87 [2018-10-26 22:33:30,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-26 22:33:30,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-26 22:33:30,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-10-26 22:33:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-26 22:33:30,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-26 22:33:30,421 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 82 [2018-10-26 22:33:30,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:30,422 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-26 22:33:30,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-26 22:33:30,422 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-26 22:33:30,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-26 22:33:30,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:30,422 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:30,423 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:30,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:30,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1423041779, now seen corresponding path program 26 times [2018-10-26 22:33:30,423 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:30,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:30,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:30,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:30,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:31,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:31,472 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:31,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:33:31,496 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:33:31,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:31,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:31,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:31,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-26 22:33:31,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-26 22:33:31,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-26 22:33:31,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-26 22:33:31,537 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 29 states. [2018-10-26 22:33:31,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:31,638 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-26 22:33:31,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-26 22:33:31,639 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2018-10-26 22:33:31,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:31,640 INFO L225 Difference]: With dead ends: 94 [2018-10-26 22:33:31,640 INFO L226 Difference]: Without dead ends: 90 [2018-10-26 22:33:31,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-26 22:33:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-26 22:33:31,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-10-26 22:33:31,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-26 22:33:31,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-26 22:33:31,643 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 85 [2018-10-26 22:33:31,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:31,643 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-26 22:33:31,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-26 22:33:31,644 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-26 22:33:31,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-26 22:33:31,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:31,644 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:31,645 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:31,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:31,645 INFO L82 PathProgramCache]: Analyzing trace with hash -863235509, now seen corresponding path program 27 times [2018-10-26 22:33:31,645 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:31,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:31,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:31,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:31,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:32,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:32,620 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:32,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:32,654 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-26 22:33:32,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:32,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:32,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:32,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-26 22:33:32,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-26 22:33:32,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-26 22:33:32,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-26 22:33:32,704 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 30 states. [2018-10-26 22:33:32,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:32,862 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-26 22:33:32,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-26 22:33:32,863 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 88 [2018-10-26 22:33:32,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:32,864 INFO L225 Difference]: With dead ends: 97 [2018-10-26 22:33:32,864 INFO L226 Difference]: Without dead ends: 93 [2018-10-26 22:33:32,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-26 22:33:32,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-26 22:33:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2018-10-26 22:33:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-26 22:33:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-26 22:33:32,868 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 88 [2018-10-26 22:33:32,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:32,868 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-26 22:33:32,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-26 22:33:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-26 22:33:32,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-26 22:33:32,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:32,869 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:32,869 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:32,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:32,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1032656307, now seen corresponding path program 28 times [2018-10-26 22:33:32,870 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:32,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:32,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:32,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:32,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:33,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:33,251 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:33,260 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:33:33,274 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:33:33,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:33,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:33,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:33,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-26 22:33:33,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-26 22:33:33,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-26 22:33:33,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-26 22:33:33,317 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 31 states. [2018-10-26 22:33:33,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:33,428 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-26 22:33:33,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-26 22:33:33,429 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2018-10-26 22:33:33,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:33,430 INFO L225 Difference]: With dead ends: 100 [2018-10-26 22:33:33,430 INFO L226 Difference]: Without dead ends: 96 [2018-10-26 22:33:33,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-26 22:33:33,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-26 22:33:33,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2018-10-26 22:33:33,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-26 22:33:33,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-26 22:33:33,434 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 91 [2018-10-26 22:33:33,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:33,435 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-26 22:33:33,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-26 22:33:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-26 22:33:33,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-26 22:33:33,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:33,436 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:33,436 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:33,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:33,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1661076725, now seen corresponding path program 29 times [2018-10-26 22:33:33,436 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:33,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:33,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:33,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:33,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:34,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:34,018 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:34,026 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:33:34,052 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-26 22:33:34,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:34,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:34,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:34,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-26 22:33:34,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-26 22:33:34,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-26 22:33:34,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-26 22:33:34,100 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 32 states. [2018-10-26 22:33:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:34,385 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-26 22:33:34,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-26 22:33:34,386 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 94 [2018-10-26 22:33:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:34,387 INFO L225 Difference]: With dead ends: 103 [2018-10-26 22:33:34,387 INFO L226 Difference]: Without dead ends: 99 [2018-10-26 22:33:34,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-26 22:33:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-26 22:33:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2018-10-26 22:33:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-26 22:33:34,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-26 22:33:34,391 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 94 [2018-10-26 22:33:34,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:34,391 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-26 22:33:34,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-26 22:33:34,392 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-26 22:33:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-26 22:33:34,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:34,392 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:34,393 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:34,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:34,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1171306099, now seen corresponding path program 30 times [2018-10-26 22:33:34,393 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:34,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:34,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:34,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:34,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:35,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:35,423 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:35,431 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:33:35,472 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-26 22:33:35,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:35,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:35,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:35,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-26 22:33:35,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-26 22:33:35,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-26 22:33:35,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 22:33:35,533 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 33 states. [2018-10-26 22:33:35,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:35,768 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-26 22:33:35,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-26 22:33:35,769 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2018-10-26 22:33:35,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:35,770 INFO L225 Difference]: With dead ends: 106 [2018-10-26 22:33:35,770 INFO L226 Difference]: Without dead ends: 102 [2018-10-26 22:33:35,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 22:33:35,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-26 22:33:35,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2018-10-26 22:33:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-26 22:33:35,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-26 22:33:35,786 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 97 [2018-10-26 22:33:35,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:35,786 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-26 22:33:35,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-26 22:33:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-26 22:33:35,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-26 22:33:35,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:35,787 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:35,787 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:35,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:35,788 INFO L82 PathProgramCache]: Analyzing trace with hash -418491445, now seen corresponding path program 31 times [2018-10-26 22:33:35,789 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:35,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:35,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:35,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:35,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:36,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:36,275 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:36,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:36,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:36,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:36,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-26 22:33:36,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-26 22:33:36,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-26 22:33:36,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 22:33:36,341 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 34 states. [2018-10-26 22:33:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:36,459 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-26 22:33:36,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-26 22:33:36,459 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 100 [2018-10-26 22:33:36,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:36,460 INFO L225 Difference]: With dead ends: 109 [2018-10-26 22:33:36,460 INFO L226 Difference]: Without dead ends: 105 [2018-10-26 22:33:36,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 22:33:36,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-26 22:33:36,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2018-10-26 22:33:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-26 22:33:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-26 22:33:36,464 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 100 [2018-10-26 22:33:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:36,465 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-26 22:33:36,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-26 22:33:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-26 22:33:36,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-26 22:33:36,465 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:36,465 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:36,466 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:36,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:36,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1636353843, now seen corresponding path program 32 times [2018-10-26 22:33:36,466 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:36,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:36,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:36,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:36,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:36,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:36,981 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:36,988 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:33:37,004 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:33:37,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:37,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:37,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:37,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-26 22:33:37,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-26 22:33:37,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-26 22:33:37,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-26 22:33:37,054 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 35 states. [2018-10-26 22:33:37,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:37,204 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-26 22:33:37,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-26 22:33:37,205 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2018-10-26 22:33:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:37,206 INFO L225 Difference]: With dead ends: 112 [2018-10-26 22:33:37,206 INFO L226 Difference]: Without dead ends: 108 [2018-10-26 22:33:37,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-26 22:33:37,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-26 22:33:37,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2018-10-26 22:33:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-26 22:33:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-26 22:33:37,212 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 103 [2018-10-26 22:33:37,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:37,212 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-26 22:33:37,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-26 22:33:37,212 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-26 22:33:37,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-26 22:33:37,213 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:37,213 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:37,213 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:37,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:37,213 INFO L82 PathProgramCache]: Analyzing trace with hash 908663947, now seen corresponding path program 33 times [2018-10-26 22:33:37,214 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:37,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:37,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:37,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:37,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:37,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:37,858 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:37,865 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:37,895 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-26 22:33:37,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:37,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:37,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:37,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-26 22:33:37,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-26 22:33:37,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-26 22:33:37,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 22:33:37,950 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 36 states. [2018-10-26 22:33:38,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:38,108 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-26 22:33:38,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-26 22:33:38,108 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 106 [2018-10-26 22:33:38,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:38,109 INFO L225 Difference]: With dead ends: 115 [2018-10-26 22:33:38,110 INFO L226 Difference]: Without dead ends: 111 [2018-10-26 22:33:38,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 22:33:38,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-26 22:33:38,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-10-26 22:33:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-26 22:33:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-26 22:33:38,113 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 106 [2018-10-26 22:33:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:38,114 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-26 22:33:38,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-26 22:33:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-26 22:33:38,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-26 22:33:38,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:38,115 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:38,115 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:38,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:38,115 INFO L82 PathProgramCache]: Analyzing trace with hash 475969549, now seen corresponding path program 34 times [2018-10-26 22:33:38,115 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:38,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:38,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:38,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:38,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:38,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:38,822 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:38,829 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:33:38,847 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:33:38,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:38,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:38,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:38,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-26 22:33:38,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-26 22:33:38,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-26 22:33:38,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-26 22:33:38,892 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 37 states. [2018-10-26 22:33:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:39,030 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-10-26 22:33:39,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-26 22:33:39,030 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2018-10-26 22:33:39,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:39,032 INFO L225 Difference]: With dead ends: 118 [2018-10-26 22:33:39,032 INFO L226 Difference]: Without dead ends: 114 [2018-10-26 22:33:39,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-26 22:33:39,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-26 22:33:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-10-26 22:33:39,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-26 22:33:39,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-26 22:33:39,038 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 109 [2018-10-26 22:33:39,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:39,038 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-26 22:33:39,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-26 22:33:39,039 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-26 22:33:39,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-26 22:33:39,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:39,039 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:39,040 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:39,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:39,040 INFO L82 PathProgramCache]: Analyzing trace with hash -725985973, now seen corresponding path program 35 times [2018-10-26 22:33:39,040 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:39,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:39,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:39,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:39,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:39,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:39,631 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:39,638 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:33:39,707 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-26 22:33:39,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:39,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:39,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:39,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-26 22:33:39,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-26 22:33:39,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-26 22:33:39,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 22:33:39,751 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 38 states. [2018-10-26 22:33:39,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:39,946 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-26 22:33:39,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-26 22:33:39,947 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 112 [2018-10-26 22:33:39,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:39,947 INFO L225 Difference]: With dead ends: 121 [2018-10-26 22:33:39,947 INFO L226 Difference]: Without dead ends: 117 [2018-10-26 22:33:39,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 22:33:39,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-26 22:33:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2018-10-26 22:33:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-26 22:33:39,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-26 22:33:39,951 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 112 [2018-10-26 22:33:39,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:39,951 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-26 22:33:39,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-26 22:33:39,952 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-26 22:33:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-26 22:33:39,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:39,952 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:39,952 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:39,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:39,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1040595123, now seen corresponding path program 36 times [2018-10-26 22:33:39,953 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:39,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:39,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:39,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:39,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:40,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:40,706 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:40,720 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:33:40,759 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-26 22:33:40,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:40,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:40,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:40,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-26 22:33:40,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-26 22:33:40,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-26 22:33:40,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-26 22:33:40,816 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 39 states. [2018-10-26 22:33:41,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:41,300 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-10-26 22:33:41,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-26 22:33:41,301 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2018-10-26 22:33:41,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:41,302 INFO L225 Difference]: With dead ends: 124 [2018-10-26 22:33:41,302 INFO L226 Difference]: Without dead ends: 120 [2018-10-26 22:33:41,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-26 22:33:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-26 22:33:41,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2018-10-26 22:33:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-26 22:33:41,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-26 22:33:41,306 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 115 [2018-10-26 22:33:41,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:41,306 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-26 22:33:41,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-26 22:33:41,306 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-26 22:33:41,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-26 22:33:41,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:41,307 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:41,307 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:41,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:41,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1943142901, now seen corresponding path program 37 times [2018-10-26 22:33:41,308 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:41,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:41,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:41,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:41,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:42,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:42,868 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:42,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:42,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:42,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:42,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-26 22:33:42,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-26 22:33:42,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-26 22:33:42,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-26 22:33:42,950 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 40 states. [2018-10-26 22:33:43,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:43,107 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-26 22:33:43,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-26 22:33:43,108 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 118 [2018-10-26 22:33:43,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:43,109 INFO L225 Difference]: With dead ends: 127 [2018-10-26 22:33:43,110 INFO L226 Difference]: Without dead ends: 123 [2018-10-26 22:33:43,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-26 22:33:43,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-26 22:33:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2018-10-26 22:33:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-26 22:33:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-26 22:33:43,114 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 118 [2018-10-26 22:33:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:43,115 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-26 22:33:43,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-26 22:33:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-26 22:33:43,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-26 22:33:43,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:43,116 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:43,116 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:43,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:43,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1046242957, now seen corresponding path program 38 times [2018-10-26 22:33:43,116 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:43,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:43,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:43,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:43,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:43,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:43,766 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:43,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:33:43,796 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:33:43,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:43,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:43,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:43,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-26 22:33:43,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-26 22:33:43,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-26 22:33:43,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 22:33:43,846 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 41 states. [2018-10-26 22:33:44,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:44,060 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-10-26 22:33:44,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-26 22:33:44,067 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 121 [2018-10-26 22:33:44,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:44,068 INFO L225 Difference]: With dead ends: 130 [2018-10-26 22:33:44,068 INFO L226 Difference]: Without dead ends: 126 [2018-10-26 22:33:44,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 22:33:44,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-26 22:33:44,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2018-10-26 22:33:44,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-26 22:33:44,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-26 22:33:44,072 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 121 [2018-10-26 22:33:44,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:44,073 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-26 22:33:44,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-26 22:33:44,073 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-26 22:33:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-26 22:33:44,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:44,074 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:44,074 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:44,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:44,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1693456075, now seen corresponding path program 39 times [2018-10-26 22:33:44,074 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:44,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:44,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:44,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:44,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:45,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:45,385 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:45,402 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:45,437 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-26 22:33:45,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:45,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:45,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:45,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-26 22:33:45,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-26 22:33:45,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-26 22:33:45,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 22:33:45,482 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 42 states. [2018-10-26 22:33:45,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:45,672 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-26 22:33:45,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-26 22:33:45,672 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 124 [2018-10-26 22:33:45,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:45,673 INFO L225 Difference]: With dead ends: 133 [2018-10-26 22:33:45,674 INFO L226 Difference]: Without dead ends: 129 [2018-10-26 22:33:45,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 22:33:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-26 22:33:45,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2018-10-26 22:33:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-26 22:33:45,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-26 22:33:45,678 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 124 [2018-10-26 22:33:45,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:45,679 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-26 22:33:45,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-26 22:33:45,679 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-26 22:33:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-26 22:33:45,680 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:45,680 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:45,680 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:45,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:45,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1583704627, now seen corresponding path program 40 times [2018-10-26 22:33:45,680 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:45,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:45,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:45,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:45,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:47,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:47,194 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:47,204 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:33:47,250 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:33:47,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:47,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:47,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:47,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-26 22:33:47,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-26 22:33:47,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-26 22:33:47,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-26 22:33:47,307 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 43 states. [2018-10-26 22:33:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:47,534 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-10-26 22:33:47,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-26 22:33:47,534 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2018-10-26 22:33:47,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:47,536 INFO L225 Difference]: With dead ends: 136 [2018-10-26 22:33:47,536 INFO L226 Difference]: Without dead ends: 132 [2018-10-26 22:33:47,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-26 22:33:47,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-26 22:33:47,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2018-10-26 22:33:47,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-26 22:33:47,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-26 22:33:47,542 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 127 [2018-10-26 22:33:47,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:47,542 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-26 22:33:47,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-26 22:33:47,542 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-26 22:33:47,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-26 22:33:47,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:47,543 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:47,543 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:47,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:47,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1718394763, now seen corresponding path program 41 times [2018-10-26 22:33:47,544 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:47,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:47,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:47,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:47,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:48,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:48,405 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:48,414 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:33:48,450 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-26 22:33:48,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:48,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:48,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:48,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-26 22:33:48,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-26 22:33:48,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-26 22:33:48,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 22:33:48,508 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 44 states. [2018-10-26 22:33:48,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:48,662 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-26 22:33:48,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-26 22:33:48,663 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 130 [2018-10-26 22:33:48,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:48,664 INFO L225 Difference]: With dead ends: 139 [2018-10-26 22:33:48,664 INFO L226 Difference]: Without dead ends: 135 [2018-10-26 22:33:48,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 22:33:48,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-26 22:33:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2018-10-26 22:33:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-26 22:33:48,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-26 22:33:48,669 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 130 [2018-10-26 22:33:48,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:48,669 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-26 22:33:48,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-26 22:33:48,670 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-26 22:33:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-26 22:33:48,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:48,671 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:48,671 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:48,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:48,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1664592627, now seen corresponding path program 42 times [2018-10-26 22:33:48,671 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:48,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:48,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:48,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:48,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:50,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:50,308 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:50,316 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:33:50,356 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-26 22:33:50,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:50,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:50,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:50,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-26 22:33:50,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-26 22:33:50,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-26 22:33:50,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 22:33:50,406 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 45 states. [2018-10-26 22:33:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:50,571 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-10-26 22:33:50,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-26 22:33:50,571 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2018-10-26 22:33:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:50,573 INFO L225 Difference]: With dead ends: 142 [2018-10-26 22:33:50,573 INFO L226 Difference]: Without dead ends: 138 [2018-10-26 22:33:50,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 22:33:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-26 22:33:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-10-26 22:33:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-26 22:33:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-26 22:33:50,577 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 133 [2018-10-26 22:33:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:50,577 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-26 22:33:50,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-26 22:33:50,578 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-26 22:33:50,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-26 22:33:50,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:50,578 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:50,579 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:50,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:50,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1460639819, now seen corresponding path program 43 times [2018-10-26 22:33:50,579 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:50,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:50,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:50,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:50,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:52,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:52,325 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:52,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:52,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:52,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:52,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-26 22:33:52,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-26 22:33:52,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-26 22:33:52,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-26 22:33:52,402 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 46 states. [2018-10-26 22:33:52,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:52,534 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-26 22:33:52,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-26 22:33:52,535 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 136 [2018-10-26 22:33:52,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:52,536 INFO L225 Difference]: With dead ends: 145 [2018-10-26 22:33:52,536 INFO L226 Difference]: Without dead ends: 141 [2018-10-26 22:33:52,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-26 22:33:52,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-26 22:33:52,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2018-10-26 22:33:52,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-26 22:33:52,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-26 22:33:52,541 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 136 [2018-10-26 22:33:52,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:52,541 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-26 22:33:52,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-26 22:33:52,542 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-26 22:33:52,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-26 22:33:52,542 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:52,543 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:52,543 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:52,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:52,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1040604083, now seen corresponding path program 44 times [2018-10-26 22:33:52,543 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:52,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:52,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:52,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:52,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:53,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:53,808 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-26 22:33:53,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:53,873 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:33:53,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:53,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:53,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:53,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-26 22:33:53,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-26 22:33:53,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-26 22:33:53,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-26 22:33:53,945 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 47 states. [2018-10-26 22:33:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:54,582 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-10-26 22:33:54,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-26 22:33:54,583 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2018-10-26 22:33:54,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:54,583 INFO L225 Difference]: With dead ends: 148 [2018-10-26 22:33:54,583 INFO L226 Difference]: Without dead ends: 144 [2018-10-26 22:33:54,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-26 22:33:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-26 22:33:54,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2018-10-26 22:33:54,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-26 22:33:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-26 22:33:54,587 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 139 [2018-10-26 22:33:54,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:54,587 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-26 22:33:54,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-26 22:33:54,587 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-26 22:33:54,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-26 22:33:54,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:54,588 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:54,588 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:54,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:54,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2084897035, now seen corresponding path program 45 times [2018-10-26 22:33:54,589 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:54,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:54,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:54,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:54,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:56,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:56,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:56,038 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:56,046 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:56,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-26 22:33:56,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:56,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:56,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:56,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-26 22:33:56,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-26 22:33:56,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-26 22:33:56,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-26 22:33:56,154 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 48 states. [2018-10-26 22:33:56,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:56,430 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-26 22:33:56,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-26 22:33:56,430 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 142 [2018-10-26 22:33:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:56,431 INFO L225 Difference]: With dead ends: 151 [2018-10-26 22:33:56,431 INFO L226 Difference]: Without dead ends: 147 [2018-10-26 22:33:56,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-26 22:33:56,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-26 22:33:56,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2018-10-26 22:33:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-26 22:33:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-26 22:33:56,435 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 142 [2018-10-26 22:33:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:56,435 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-26 22:33:56,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-26 22:33:56,435 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-26 22:33:56,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-26 22:33:56,436 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:56,436 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:56,436 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:56,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:56,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1002273907, now seen corresponding path program 46 times [2018-10-26 22:33:56,436 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:56,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:56,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:56,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:56,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:57,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:57,703 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:57,712 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:33:57,734 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:33:57,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:57,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:57,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:57,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-26 22:33:57,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-26 22:33:57,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-26 22:33:57,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-26 22:33:57,801 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 49 states. [2018-10-26 22:33:58,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:58,091 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-10-26 22:33:58,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-26 22:33:58,091 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 145 [2018-10-26 22:33:58,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:58,093 INFO L225 Difference]: With dead ends: 154 [2018-10-26 22:33:58,093 INFO L226 Difference]: Without dead ends: 150 [2018-10-26 22:33:58,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-26 22:33:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-26 22:33:58,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2018-10-26 22:33:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-26 22:33:58,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-26 22:33:58,097 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 145 [2018-10-26 22:33:58,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:58,097 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-26 22:33:58,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-26 22:33:58,097 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-26 22:33:58,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-26 22:33:58,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:58,098 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:58,098 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:58,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:58,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1517869515, now seen corresponding path program 47 times [2018-10-26 22:33:58,098 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:58,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:58,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:58,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:58,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:59,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:59,036 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:59,044 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:33:59,086 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-26 22:33:59,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:59,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:59,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:59,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-26 22:33:59,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-26 22:33:59,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-26 22:33:59,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-26 22:33:59,155 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 50 states. [2018-10-26 22:34:00,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:00,090 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-26 22:34:00,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-26 22:34:00,090 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 148 [2018-10-26 22:34:00,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:00,092 INFO L225 Difference]: With dead ends: 157 [2018-10-26 22:34:00,092 INFO L226 Difference]: Without dead ends: 153 [2018-10-26 22:34:00,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-26 22:34:00,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-26 22:34:00,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2018-10-26 22:34:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-26 22:34:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-26 22:34:00,095 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 148 [2018-10-26 22:34:00,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:00,096 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-26 22:34:00,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-26 22:34:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-26 22:34:00,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-26 22:34:00,097 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:00,097 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:00,097 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:00,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1212747059, now seen corresponding path program 48 times [2018-10-26 22:34:00,098 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:00,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:00,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:00,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:00,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:01,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:01,238 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:01,245 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:34:01,289 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-26 22:34:01,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:01,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:01,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:01,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-26 22:34:01,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-26 22:34:01,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-26 22:34:01,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-26 22:34:01,339 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 51 states. [2018-10-26 22:34:01,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:01,543 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-10-26 22:34:01,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-26 22:34:01,544 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 151 [2018-10-26 22:34:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:01,545 INFO L225 Difference]: With dead ends: 160 [2018-10-26 22:34:01,545 INFO L226 Difference]: Without dead ends: 156 [2018-10-26 22:34:01,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-26 22:34:01,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-26 22:34:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2018-10-26 22:34:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-26 22:34:01,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-26 22:34:01,549 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 151 [2018-10-26 22:34:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:01,549 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-26 22:34:01,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-26 22:34:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-26 22:34:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-26 22:34:01,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:01,550 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:01,550 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:01,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:01,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1964450443, now seen corresponding path program 49 times [2018-10-26 22:34:01,551 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:01,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:01,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:01,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:01,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:03,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:03,720 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:03,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:34:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:03,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:03,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:03,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-26 22:34:03,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-26 22:34:03,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-26 22:34:03,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-26 22:34:03,838 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 52 states. [2018-10-26 22:34:04,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:04,059 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-26 22:34:04,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-26 22:34:04,060 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 154 [2018-10-26 22:34:04,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:04,062 INFO L225 Difference]: With dead ends: 163 [2018-10-26 22:34:04,062 INFO L226 Difference]: Without dead ends: 159 [2018-10-26 22:34:04,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-26 22:34:04,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-26 22:34:04,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2018-10-26 22:34:04,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-26 22:34:04,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-26 22:34:04,064 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 154 [2018-10-26 22:34:04,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:04,065 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-26 22:34:04,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-26 22:34:04,065 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-26 22:34:04,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-26 22:34:04,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:04,066 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:04,066 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:04,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:04,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1365963277, now seen corresponding path program 50 times [2018-10-26 22:34:04,066 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:04,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:04,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:04,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:34:04,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:07,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:07,693 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:07,702 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:34:07,729 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:34:07,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:07,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:07,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:07,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-26 22:34:07,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-26 22:34:07,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-26 22:34:07,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-26 22:34:07,798 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 53 states. [2018-10-26 22:34:07,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:07,998 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-10-26 22:34:07,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-26 22:34:07,999 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 157 [2018-10-26 22:34:07,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:08,000 INFO L225 Difference]: With dead ends: 166 [2018-10-26 22:34:08,000 INFO L226 Difference]: Without dead ends: 162 [2018-10-26 22:34:08,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-26 22:34:08,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-26 22:34:08,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-10-26 22:34:08,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-26 22:34:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-26 22:34:08,004 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 157 [2018-10-26 22:34:08,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:08,005 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-26 22:34:08,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-26 22:34:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-26 22:34:08,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-26 22:34:08,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:08,006 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 51, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:08,006 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:08,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:08,006 INFO L82 PathProgramCache]: Analyzing trace with hash 244046667, now seen corresponding path program 51 times [2018-10-26 22:34:08,007 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:08,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:08,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:08,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:08,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:11,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:11,573 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:11,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:34:11,638 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-26 22:34:11,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:11,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:11,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:11,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-26 22:34:11,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-26 22:34:11,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-26 22:34:11,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-26 22:34:11,710 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 54 states. [2018-10-26 22:34:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:12,000 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-26 22:34:12,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-26 22:34:12,000 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 160 [2018-10-26 22:34:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:12,002 INFO L225 Difference]: With dead ends: 169 [2018-10-26 22:34:12,002 INFO L226 Difference]: Without dead ends: 165 [2018-10-26 22:34:12,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-26 22:34:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-26 22:34:12,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2018-10-26 22:34:12,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-26 22:34:12,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-10-26 22:34:12,005 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 160 [2018-10-26 22:34:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:12,005 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-10-26 22:34:12,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-26 22:34:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-10-26 22:34:12,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-26 22:34:12,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:12,006 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 52, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:12,006 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:12,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:12,006 INFO L82 PathProgramCache]: Analyzing trace with hash 661815629, now seen corresponding path program 52 times [2018-10-26 22:34:12,006 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:12,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:12,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:12,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:12,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:13,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:13,921 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:13,928 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:34:13,955 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:34:13,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:13,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:14,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:14,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-26 22:34:14,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-26 22:34:14,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-26 22:34:14,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-26 22:34:14,025 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 55 states. [2018-10-26 22:34:14,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:14,390 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-10-26 22:34:14,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-26 22:34:14,391 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2018-10-26 22:34:14,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:14,392 INFO L225 Difference]: With dead ends: 172 [2018-10-26 22:34:14,392 INFO L226 Difference]: Without dead ends: 168 [2018-10-26 22:34:14,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-26 22:34:14,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-26 22:34:14,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2018-10-26 22:34:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-26 22:34:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-26 22:34:14,395 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 163 [2018-10-26 22:34:14,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:14,396 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-26 22:34:14,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-26 22:34:14,396 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-26 22:34:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-26 22:34:14,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:14,397 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 53, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:14,397 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:14,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:14,398 INFO L82 PathProgramCache]: Analyzing trace with hash -398261237, now seen corresponding path program 53 times [2018-10-26 22:34:14,398 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:14,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:14,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:14,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:14,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:15,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:15,950 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:15,958 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:34:16,005 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-26 22:34:16,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:16,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:16,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:16,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-26 22:34:16,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-26 22:34:16,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-26 22:34:16,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-26 22:34:16,082 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 56 states. [2018-10-26 22:34:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:16,380 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-26 22:34:16,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-26 22:34:16,380 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 166 [2018-10-26 22:34:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:16,382 INFO L225 Difference]: With dead ends: 175 [2018-10-26 22:34:16,382 INFO L226 Difference]: Without dead ends: 171 [2018-10-26 22:34:16,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-26 22:34:16,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-26 22:34:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2018-10-26 22:34:16,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-10-26 22:34:16,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-10-26 22:34:16,385 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 166 [2018-10-26 22:34:16,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:16,386 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-10-26 22:34:16,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-26 22:34:16,386 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-10-26 22:34:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-10-26 22:34:16,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:16,387 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 54, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:16,387 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:16,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:16,387 INFO L82 PathProgramCache]: Analyzing trace with hash -253648755, now seen corresponding path program 54 times [2018-10-26 22:34:16,387 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:16,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:16,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:16,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:16,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:17,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:17,683 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:17,690 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:34:17,742 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-26 22:34:17,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:17,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:17,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:17,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-26 22:34:17,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-26 22:34:17,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-26 22:34:17,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-26 22:34:17,806 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 57 states. [2018-10-26 22:34:18,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:18,696 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-10-26 22:34:18,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-26 22:34:18,696 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 169 [2018-10-26 22:34:18,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:18,697 INFO L225 Difference]: With dead ends: 178 [2018-10-26 22:34:18,697 INFO L226 Difference]: Without dead ends: 174 [2018-10-26 22:34:18,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-26 22:34:18,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-26 22:34:18,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2018-10-26 22:34:18,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-26 22:34:18,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-26 22:34:18,701 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 169 [2018-10-26 22:34:18,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:18,702 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-26 22:34:18,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-26 22:34:18,702 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-26 22:34:18,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-26 22:34:18,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:18,703 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:18,703 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:18,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:18,703 INFO L82 PathProgramCache]: Analyzing trace with hash 44604619, now seen corresponding path program 55 times [2018-10-26 22:34:18,704 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:18,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:18,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:18,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:18,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:21,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:21,929 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:21,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:34:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:21,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:22,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:22,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-26 22:34:22,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-26 22:34:22,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-26 22:34:22,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-26 22:34:22,045 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 58 states. [2018-10-26 22:34:22,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:22,424 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-26 22:34:22,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-26 22:34:22,424 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 172 [2018-10-26 22:34:22,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:22,425 INFO L225 Difference]: With dead ends: 181 [2018-10-26 22:34:22,426 INFO L226 Difference]: Without dead ends: 177 [2018-10-26 22:34:22,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-26 22:34:22,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-26 22:34:22,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2018-10-26 22:34:22,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-26 22:34:22,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-10-26 22:34:22,430 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 172 [2018-10-26 22:34:22,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:22,430 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-10-26 22:34:22,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-26 22:34:22,430 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-10-26 22:34:22,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-26 22:34:22,431 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:22,431 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 56, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:22,431 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:22,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:22,432 INFO L82 PathProgramCache]: Analyzing trace with hash -976465971, now seen corresponding path program 56 times [2018-10-26 22:34:22,432 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:22,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:22,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:22,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:34:22,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:23,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:23,672 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:23,681 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:34:23,712 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:34:23,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:23,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:23,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:23,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-26 22:34:23,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-26 22:34:23,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-26 22:34:23,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-26 22:34:23,774 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 59 states. [2018-10-26 22:34:23,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:23,970 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2018-10-26 22:34:23,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-26 22:34:23,971 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 175 [2018-10-26 22:34:23,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:23,972 INFO L225 Difference]: With dead ends: 184 [2018-10-26 22:34:23,972 INFO L226 Difference]: Without dead ends: 180 [2018-10-26 22:34:23,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-26 22:34:23,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-26 22:34:23,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2018-10-26 22:34:23,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-26 22:34:23,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-26 22:34:23,976 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 175 [2018-10-26 22:34:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:23,976 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-26 22:34:23,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-26 22:34:23,977 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-26 22:34:23,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-26 22:34:23,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:23,978 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 57, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:23,978 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:23,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:23,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1562944907, now seen corresponding path program 57 times [2018-10-26 22:34:23,978 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:23,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:23,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:23,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:23,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:25,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:25,499 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:25,506 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:34:25,701 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-26 22:34:25,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:25,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:25,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:25,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-26 22:34:25,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-26 22:34:25,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-26 22:34:25,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-26 22:34:25,782 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 60 states. [2018-10-26 22:34:26,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:26,190 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-26 22:34:26,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-26 22:34:26,191 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 178 [2018-10-26 22:34:26,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:26,192 INFO L225 Difference]: With dead ends: 187 [2018-10-26 22:34:26,192 INFO L226 Difference]: Without dead ends: 183 [2018-10-26 22:34:26,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-26 22:34:26,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-26 22:34:26,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2018-10-26 22:34:26,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-26 22:34:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-10-26 22:34:26,197 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 178 [2018-10-26 22:34:26,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:26,198 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-10-26 22:34:26,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-26 22:34:26,198 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-10-26 22:34:26,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-26 22:34:26,199 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:26,199 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 58, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:26,199 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:26,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:26,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1598459661, now seen corresponding path program 58 times [2018-10-26 22:34:26,200 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:26,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:26,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:26,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:26,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:27,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:27,476 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:27,489 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:34:27,534 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:34:27,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:27,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:27,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:27,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-26 22:34:27,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-26 22:34:27,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-26 22:34:27,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-26 22:34:27,611 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 61 states. [2018-10-26 22:34:28,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:28,613 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2018-10-26 22:34:28,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-26 22:34:28,613 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 181 [2018-10-26 22:34:28,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:28,615 INFO L225 Difference]: With dead ends: 190 [2018-10-26 22:34:28,615 INFO L226 Difference]: Without dead ends: 186 [2018-10-26 22:34:28,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-26 22:34:28,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-26 22:34:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-10-26 22:34:28,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-26 22:34:28,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-10-26 22:34:28,619 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 181 [2018-10-26 22:34:28,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:28,619 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-10-26 22:34:28,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-26 22:34:28,619 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-10-26 22:34:28,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-26 22:34:28,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:28,620 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 59, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:28,620 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:28,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:28,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1238426037, now seen corresponding path program 59 times [2018-10-26 22:34:28,621 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:28,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:28,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:28,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:28,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:30,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:30,246 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:30,254 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:34:30,305 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-26 22:34:30,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:30,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:30,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:30,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-26 22:34:30,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-26 22:34:30,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-26 22:34:30,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-26 22:34:30,385 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 62 states. [2018-10-26 22:34:30,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:30,926 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-26 22:34:30,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-26 22:34:30,926 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 184 [2018-10-26 22:34:30,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:30,928 INFO L225 Difference]: With dead ends: 193 [2018-10-26 22:34:30,928 INFO L226 Difference]: Without dead ends: 189 [2018-10-26 22:34:30,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-26 22:34:30,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-26 22:34:30,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2018-10-26 22:34:30,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-10-26 22:34:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-10-26 22:34:30,932 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 184 [2018-10-26 22:34:30,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:30,932 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-10-26 22:34:30,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-26 22:34:30,932 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-10-26 22:34:30,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-26 22:34:30,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:30,933 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 60, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:30,934 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:30,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:30,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1466195533, now seen corresponding path program 60 times [2018-10-26 22:34:30,934 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:30,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:30,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:30,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:30,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:32,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:32,446 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:32,455 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:34:32,519 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-26 22:34:32,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:32,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:32,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:32,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-26 22:34:32,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-26 22:34:32,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-26 22:34:32,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-26 22:34:32,589 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 63 states. [2018-10-26 22:34:32,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:32,804 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2018-10-26 22:34:32,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-26 22:34:32,805 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 187 [2018-10-26 22:34:32,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:32,806 INFO L225 Difference]: With dead ends: 196 [2018-10-26 22:34:32,807 INFO L226 Difference]: Without dead ends: 192 [2018-10-26 22:34:32,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-26 22:34:32,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-10-26 22:34:32,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2018-10-26 22:34:32,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-26 22:34:32,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-26 22:34:32,812 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 187 [2018-10-26 22:34:32,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:32,812 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-26 22:34:32,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-26 22:34:32,812 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-26 22:34:32,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-26 22:34:32,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:32,813 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:32,813 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:32,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:32,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1260914443, now seen corresponding path program 61 times [2018-10-26 22:34:32,814 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:32,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:32,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:32,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:32,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:34,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:34,240 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:34,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:34:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:34,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:34,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:34,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-26 22:34:34,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-26 22:34:34,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-26 22:34:34,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-26 22:34:34,351 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 64 states. [2018-10-26 22:34:34,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:34,641 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-10-26 22:34:34,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-26 22:34:34,641 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 190 [2018-10-26 22:34:34,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:34,642 INFO L225 Difference]: With dead ends: 199 [2018-10-26 22:34:34,642 INFO L226 Difference]: Without dead ends: 195 [2018-10-26 22:34:34,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-26 22:34:34,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-26 22:34:34,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2018-10-26 22:34:34,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-26 22:34:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-10-26 22:34:34,646 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 190 [2018-10-26 22:34:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:34,646 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-10-26 22:34:34,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-26 22:34:34,646 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-10-26 22:34:34,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-26 22:34:34,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:34,647 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 62, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:34,647 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:34,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:34,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1765391757, now seen corresponding path program 62 times [2018-10-26 22:34:34,647 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:34,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:34,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:34,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:34:34,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:36,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:36,573 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:36,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:34:36,615 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:34:36,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:36,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:36,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:36,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-26 22:34:36,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-26 22:34:36,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-26 22:34:36,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-26 22:34:36,678 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 65 states. [2018-10-26 22:34:36,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:36,976 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-10-26 22:34:36,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-26 22:34:36,977 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 193 [2018-10-26 22:34:36,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:36,978 INFO L225 Difference]: With dead ends: 202 [2018-10-26 22:34:36,978 INFO L226 Difference]: Without dead ends: 198 [2018-10-26 22:34:36,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-26 22:34:36,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-26 22:34:36,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2018-10-26 22:34:36,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-26 22:34:36,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-10-26 22:34:36,982 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 193 [2018-10-26 22:34:36,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:36,983 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-10-26 22:34:36,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-26 22:34:36,983 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-10-26 22:34:36,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-26 22:34:36,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:36,984 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 63, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:36,984 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:36,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:36,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1736482869, now seen corresponding path program 63 times [2018-10-26 22:34:36,985 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:36,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:36,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:36,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:36,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:38,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:38,541 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:38,552 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:34:38,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-26 22:34:38,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:38,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:38,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:38,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-26 22:34:38,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-26 22:34:38,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-26 22:34:38,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-26 22:34:38,694 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 66 states. [2018-10-26 22:34:38,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:38,933 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-10-26 22:34:38,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-26 22:34:38,933 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 196 [2018-10-26 22:34:38,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:38,935 INFO L225 Difference]: With dead ends: 205 [2018-10-26 22:34:38,935 INFO L226 Difference]: Without dead ends: 201 [2018-10-26 22:34:38,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-26 22:34:38,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-26 22:34:38,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2018-10-26 22:34:38,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-26 22:34:38,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2018-10-26 22:34:38,939 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 196 [2018-10-26 22:34:38,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:38,940 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2018-10-26 22:34:38,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-26 22:34:38,940 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2018-10-26 22:34:38,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-26 22:34:38,941 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:38,941 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 64, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:38,941 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:38,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:38,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1327846195, now seen corresponding path program 64 times [2018-10-26 22:34:38,942 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:38,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:38,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:38,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:38,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:40,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:40,543 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:40,550 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:34:40,600 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:34:40,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:40,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:40,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:40,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-26 22:34:40,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-26 22:34:40,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-26 22:34:40,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-26 22:34:40,671 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand 67 states. [2018-10-26 22:34:40,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:40,930 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2018-10-26 22:34:40,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-26 22:34:40,930 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 199 [2018-10-26 22:34:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:40,931 INFO L225 Difference]: With dead ends: 208 [2018-10-26 22:34:40,931 INFO L226 Difference]: Without dead ends: 204 [2018-10-26 22:34:40,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-26 22:34:40,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-26 22:34:40,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2018-10-26 22:34:40,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-26 22:34:40,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-10-26 22:34:40,934 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 199 [2018-10-26 22:34:40,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:40,934 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-10-26 22:34:40,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-26 22:34:40,935 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-10-26 22:34:40,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-26 22:34:40,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:40,935 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 65, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:40,936 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:40,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:40,936 INFO L82 PathProgramCache]: Analyzing trace with hash 429992075, now seen corresponding path program 65 times [2018-10-26 22:34:40,936 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:40,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:40,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:40,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:40,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:42,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:42,824 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:42,832 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:34:42,894 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-26 22:34:42,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:42,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:42,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:42,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-26 22:34:42,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-26 22:34:42,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-26 22:34:42,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-26 22:34:42,980 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 68 states. [2018-10-26 22:34:43,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:43,324 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-10-26 22:34:43,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-26 22:34:43,325 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 202 [2018-10-26 22:34:43,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:43,326 INFO L225 Difference]: With dead ends: 211 [2018-10-26 22:34:43,326 INFO L226 Difference]: Without dead ends: 207 [2018-10-26 22:34:43,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-26 22:34:43,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-26 22:34:43,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2018-10-26 22:34:43,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-10-26 22:34:43,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2018-10-26 22:34:43,329 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 202 [2018-10-26 22:34:43,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:43,330 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2018-10-26 22:34:43,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-26 22:34:43,330 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2018-10-26 22:34:43,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-10-26 22:34:43,331 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:43,331 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 66, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:43,331 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:43,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:43,331 INFO L82 PathProgramCache]: Analyzing trace with hash -346346483, now seen corresponding path program 66 times [2018-10-26 22:34:43,331 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:43,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:43,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:43,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:43,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:44,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:44,946 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:44,954 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:34:45,019 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-26 22:34:45,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:45,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:45,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:45,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-26 22:34:45,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-26 22:34:45,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-26 22:34:45,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-26 22:34:45,116 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 69 states. [2018-10-26 22:34:45,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:45,361 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2018-10-26 22:34:45,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-26 22:34:45,362 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 205 [2018-10-26 22:34:45,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:45,363 INFO L225 Difference]: With dead ends: 214 [2018-10-26 22:34:45,363 INFO L226 Difference]: Without dead ends: 210 [2018-10-26 22:34:45,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-26 22:34:45,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-26 22:34:45,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2018-10-26 22:34:45,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-26 22:34:45,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-10-26 22:34:45,367 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 205 [2018-10-26 22:34:45,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:45,367 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-10-26 22:34:45,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-26 22:34:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-10-26 22:34:45,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-26 22:34:45,368 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:45,368 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:45,368 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:45,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:45,368 INFO L82 PathProgramCache]: Analyzing trace with hash 150561099, now seen corresponding path program 67 times [2018-10-26 22:34:45,369 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:45,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:45,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:45,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:45,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:47,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:47,340 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:47,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:34:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:47,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:47,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:47,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-26 22:34:47,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-26 22:34:47,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-26 22:34:47,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-26 22:34:47,442 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 70 states. [2018-10-26 22:34:47,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:47,792 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-10-26 22:34:47,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-26 22:34:47,792 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 208 [2018-10-26 22:34:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:47,793 INFO L225 Difference]: With dead ends: 217 [2018-10-26 22:34:47,793 INFO L226 Difference]: Without dead ends: 213 [2018-10-26 22:34:47,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-26 22:34:47,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-26 22:34:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2018-10-26 22:34:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-10-26 22:34:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2018-10-26 22:34:47,797 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 208 [2018-10-26 22:34:47,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:47,797 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2018-10-26 22:34:47,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-26 22:34:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2018-10-26 22:34:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-26 22:34:47,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:47,798 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 68, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:47,798 INFO L424 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:47,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:47,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1227932851, now seen corresponding path program 68 times [2018-10-26 22:34:47,799 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:47,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:47,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:47,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:34:47,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:49,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:49,561 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:49,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:34:49,603 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:34:49,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:49,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:49,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:49,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-26 22:34:49,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-26 22:34:49,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-26 22:34:49,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-26 22:34:49,666 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 71 states. [2018-10-26 22:34:50,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:50,010 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2018-10-26 22:34:50,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-26 22:34:50,011 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 211 [2018-10-26 22:34:50,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:50,012 INFO L225 Difference]: With dead ends: 220 [2018-10-26 22:34:50,012 INFO L226 Difference]: Without dead ends: 216 [2018-10-26 22:34:50,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-26 22:34:50,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-26 22:34:50,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2018-10-26 22:34:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-26 22:34:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-10-26 22:34:50,016 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 211 [2018-10-26 22:34:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:50,016 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-10-26 22:34:50,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-26 22:34:50,017 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-10-26 22:34:50,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-26 22:34:50,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:50,018 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 69, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:50,018 INFO L424 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:50,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:50,018 INFO L82 PathProgramCache]: Analyzing trace with hash 536087051, now seen corresponding path program 69 times [2018-10-26 22:34:50,019 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:50,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:50,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:50,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:50,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:52,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:52,141 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:52,148 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:34:52,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-26 22:34:52,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:52,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:52,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:52,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-26 22:34:52,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-26 22:34:52,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-26 22:34:52,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-26 22:34:52,328 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 72 states. [2018-10-26 22:34:52,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:52,814 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-10-26 22:34:52,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-26 22:34:52,814 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 214 [2018-10-26 22:34:52,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:52,815 INFO L225 Difference]: With dead ends: 223 [2018-10-26 22:34:52,815 INFO L226 Difference]: Without dead ends: 219 [2018-10-26 22:34:52,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-26 22:34:52,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-26 22:34:52,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2018-10-26 22:34:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-10-26 22:34:52,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-10-26 22:34:52,818 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 214 [2018-10-26 22:34:52,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:52,819 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-10-26 22:34:52,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-26 22:34:52,819 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-10-26 22:34:52,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-26 22:34:52,819 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:52,820 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 70, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:52,820 INFO L424 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:52,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:52,820 INFO L82 PathProgramCache]: Analyzing trace with hash -766846323, now seen corresponding path program 70 times [2018-10-26 22:34:52,820 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:52,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:52,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:52,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:52,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:54,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:54,622 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:54,629 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:34:54,665 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:34:54,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:54,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:54,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:54,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-26 22:34:54,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-26 22:34:54,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-26 22:34:54,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-26 22:34:54,732 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 73 states. [2018-10-26 22:34:55,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:55,129 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2018-10-26 22:34:55,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-26 22:34:55,129 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 217 [2018-10-26 22:34:55,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:55,130 INFO L225 Difference]: With dead ends: 226 [2018-10-26 22:34:55,130 INFO L226 Difference]: Without dead ends: 222 [2018-10-26 22:34:55,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-26 22:34:55,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-26 22:34:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2018-10-26 22:34:55,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-26 22:34:55,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-10-26 22:34:55,134 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 217 [2018-10-26 22:34:55,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:55,135 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-10-26 22:34:55,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-26 22:34:55,135 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-10-26 22:34:55,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-26 22:34:55,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:55,136 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 71, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:55,136 INFO L424 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:55,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:55,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1459430091, now seen corresponding path program 71 times [2018-10-26 22:34:55,137 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:55,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:55,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:55,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:55,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:57,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:57,448 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:57,455 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:34:57,526 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-26 22:34:57,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:57,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:57,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:57,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-26 22:34:57,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-26 22:34:57,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-26 22:34:57,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-26 22:34:57,602 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 74 states. [2018-10-26 22:34:57,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:57,861 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-10-26 22:34:57,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-26 22:34:57,861 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 220 [2018-10-26 22:34:57,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:57,863 INFO L225 Difference]: With dead ends: 229 [2018-10-26 22:34:57,863 INFO L226 Difference]: Without dead ends: 225 [2018-10-26 22:34:57,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-26 22:34:57,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-10-26 22:34:57,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2018-10-26 22:34:57,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-10-26 22:34:57,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 224 transitions. [2018-10-26 22:34:57,866 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 224 transitions. Word has length 220 [2018-10-26 22:34:57,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:57,867 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 224 transitions. [2018-10-26 22:34:57,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-26 22:34:57,867 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 224 transitions. [2018-10-26 22:34:57,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-26 22:34:57,867 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:57,868 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 72, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:57,868 INFO L424 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:57,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:57,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1575094733, now seen corresponding path program 72 times [2018-10-26 22:34:57,868 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:57,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:57,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:57,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:57,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:59,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:59,992 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:00,000 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:35:00,076 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-26 22:35:00,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:00,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:00,142 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:00,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-26 22:35:00,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-26 22:35:00,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-26 22:35:00,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-26 22:35:00,143 INFO L87 Difference]: Start difference. First operand 224 states and 224 transitions. Second operand 75 states. [2018-10-26 22:35:00,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:00,541 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2018-10-26 22:35:00,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-26 22:35:00,541 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 223 [2018-10-26 22:35:00,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:00,542 INFO L225 Difference]: With dead ends: 232 [2018-10-26 22:35:00,542 INFO L226 Difference]: Without dead ends: 228 [2018-10-26 22:35:00,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-26 22:35:00,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-26 22:35:00,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2018-10-26 22:35:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-26 22:35:00,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-10-26 22:35:00,546 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 223 [2018-10-26 22:35:00,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:00,547 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-10-26 22:35:00,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-26 22:35:00,547 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-10-26 22:35:00,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-26 22:35:00,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:00,548 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 73, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:00,548 INFO L424 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:00,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:00,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1518294133, now seen corresponding path program 73 times [2018-10-26 22:35:00,549 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:00,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:00,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:00,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:00,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:02,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:02,855 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:02,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:35:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:02,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:02,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:02,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-26 22:35:02,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-26 22:35:02,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-26 22:35:02,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-26 22:35:02,988 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 76 states. [2018-10-26 22:35:03,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:03,284 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-10-26 22:35:03,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-26 22:35:03,285 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 226 [2018-10-26 22:35:03,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:03,286 INFO L225 Difference]: With dead ends: 235 [2018-10-26 22:35:03,286 INFO L226 Difference]: Without dead ends: 231 [2018-10-26 22:35:03,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-26 22:35:03,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-26 22:35:03,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2018-10-26 22:35:03,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-10-26 22:35:03,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2018-10-26 22:35:03,291 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 226 [2018-10-26 22:35:03,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:03,291 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2018-10-26 22:35:03,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-26 22:35:03,292 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2018-10-26 22:35:03,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-10-26 22:35:03,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:03,293 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 74, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:03,293 INFO L424 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:03,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:03,293 INFO L82 PathProgramCache]: Analyzing trace with hash 447269133, now seen corresponding path program 74 times [2018-10-26 22:35:03,293 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:03,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:03,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:03,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:35:03,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:05,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:05,430 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:05,438 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:35:05,476 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:35:05,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:05,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:05,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:05,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-26 22:35:05,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-26 22:35:05,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-26 22:35:05,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-26 22:35:05,557 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand 77 states. [2018-10-26 22:35:05,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:05,996 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2018-10-26 22:35:05,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-26 22:35:05,996 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 229 [2018-10-26 22:35:05,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:05,997 INFO L225 Difference]: With dead ends: 238 [2018-10-26 22:35:05,997 INFO L226 Difference]: Without dead ends: 234 [2018-10-26 22:35:05,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-26 22:35:05,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-26 22:35:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2018-10-26 22:35:06,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-10-26 22:35:06,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-10-26 22:35:06,002 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 229 [2018-10-26 22:35:06,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:06,002 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-10-26 22:35:06,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-26 22:35:06,002 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-10-26 22:35:06,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-26 22:35:06,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:06,004 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 75, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:06,004 INFO L424 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:06,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:06,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1041587125, now seen corresponding path program 75 times [2018-10-26 22:35:06,004 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:06,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:06,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:06,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:06,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:08,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:08,350 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:08,356 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:35:08,437 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-26 22:35:08,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:08,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:08,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:08,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-26 22:35:08,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-26 22:35:08,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-26 22:35:08,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-26 22:35:08,512 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 78 states. [2018-10-26 22:35:08,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:08,953 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-10-26 22:35:08,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-26 22:35:08,954 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 232 [2018-10-26 22:35:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:08,955 INFO L225 Difference]: With dead ends: 241 [2018-10-26 22:35:08,955 INFO L226 Difference]: Without dead ends: 237 [2018-10-26 22:35:08,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-26 22:35:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-26 22:35:08,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2018-10-26 22:35:08,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-10-26 22:35:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2018-10-26 22:35:08,958 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 232 [2018-10-26 22:35:08,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:08,958 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2018-10-26 22:35:08,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-26 22:35:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2018-10-26 22:35:08,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-26 22:35:08,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:08,959 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 76, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:08,959 INFO L424 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:08,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:08,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1431103411, now seen corresponding path program 76 times [2018-10-26 22:35:08,960 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:08,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:08,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:08,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:08,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:11,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:11,112 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:11,119 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:35:11,155 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:35:11,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:11,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:11,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:11,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-26 22:35:11,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-26 22:35:11,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-26 22:35:11,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-26 22:35:11,227 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 79 states. [2018-10-26 22:35:11,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:11,671 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2018-10-26 22:35:11,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-26 22:35:11,672 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 235 [2018-10-26 22:35:11,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:11,673 INFO L225 Difference]: With dead ends: 244 [2018-10-26 22:35:11,673 INFO L226 Difference]: Without dead ends: 240 [2018-10-26 22:35:11,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-26 22:35:11,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-10-26 22:35:11,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2018-10-26 22:35:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-26 22:35:11,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-10-26 22:35:11,677 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 235 [2018-10-26 22:35:11,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:11,677 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-10-26 22:35:11,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-26 22:35:11,678 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-10-26 22:35:11,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-26 22:35:11,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:11,678 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 77, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:11,679 INFO L424 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:11,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:11,679 INFO L82 PathProgramCache]: Analyzing trace with hash -509145845, now seen corresponding path program 77 times [2018-10-26 22:35:11,679 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:11,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:11,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:11,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:11,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:14,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:14,142 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:14,149 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:35:14,228 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-26 22:35:14,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:14,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:14,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:14,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-26 22:35:14,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-26 22:35:14,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-26 22:35:14,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-26 22:35:14,299 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 80 states. [2018-10-26 22:35:14,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:14,769 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-10-26 22:35:14,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-26 22:35:14,769 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 238 [2018-10-26 22:35:14,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:14,770 INFO L225 Difference]: With dead ends: 247 [2018-10-26 22:35:14,770 INFO L226 Difference]: Without dead ends: 243 [2018-10-26 22:35:14,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-26 22:35:14,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-26 22:35:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2018-10-26 22:35:14,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-10-26 22:35:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2018-10-26 22:35:14,774 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 238 [2018-10-26 22:35:14,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:14,775 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2018-10-26 22:35:14,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-26 22:35:14,775 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2018-10-26 22:35:14,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-26 22:35:14,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:14,776 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 78, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:14,776 INFO L424 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:14,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:14,777 INFO L82 PathProgramCache]: Analyzing trace with hash -787155059, now seen corresponding path program 78 times [2018-10-26 22:35:14,777 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:14,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:14,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:14,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:14,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:17,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:17,308 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:17,315 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:35:17,401 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-26 22:35:17,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:17,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:17,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:17,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-26 22:35:17,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-26 22:35:17,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-26 22:35:17,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-26 22:35:17,476 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 81 states. [2018-10-26 22:35:17,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:17,940 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2018-10-26 22:35:17,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-26 22:35:17,940 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 241 [2018-10-26 22:35:17,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:17,941 INFO L225 Difference]: With dead ends: 250 [2018-10-26 22:35:17,941 INFO L226 Difference]: Without dead ends: 246 [2018-10-26 22:35:17,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-26 22:35:17,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-26 22:35:17,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2018-10-26 22:35:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-26 22:35:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2018-10-26 22:35:17,945 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 241 [2018-10-26 22:35:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:17,945 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2018-10-26 22:35:17,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-26 22:35:17,945 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2018-10-26 22:35:17,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-26 22:35:17,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:17,946 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 79, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:17,946 INFO L424 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:17,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:17,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2032264651, now seen corresponding path program 79 times [2018-10-26 22:35:17,947 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:17,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:17,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:17,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:17,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:20,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:20,201 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:20,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:35:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:20,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:20,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:20,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-26 22:35:20,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-26 22:35:20,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-26 22:35:20,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-26 22:35:20,323 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 82 states. [2018-10-26 22:35:20,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:20,630 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-10-26 22:35:20,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-26 22:35:20,630 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 244 [2018-10-26 22:35:20,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:20,631 INFO L225 Difference]: With dead ends: 253 [2018-10-26 22:35:20,632 INFO L226 Difference]: Without dead ends: 249 [2018-10-26 22:35:20,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-26 22:35:20,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-10-26 22:35:20,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2018-10-26 22:35:20,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-10-26 22:35:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2018-10-26 22:35:20,635 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 244 [2018-10-26 22:35:20,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:20,635 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2018-10-26 22:35:20,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-26 22:35:20,635 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2018-10-26 22:35:20,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-26 22:35:20,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:20,636 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 80, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:20,636 INFO L424 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:20,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:20,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1310562611, now seen corresponding path program 80 times [2018-10-26 22:35:20,636 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:20,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:20,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:20,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:35:20,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:23,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:23,268 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:23,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:35:23,314 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:35:23,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:23,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:23,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:23,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-26 22:35:23,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-26 22:35:23,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-26 22:35:23,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-26 22:35:23,390 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 83 states. [2018-10-26 22:35:23,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:23,882 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2018-10-26 22:35:23,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-26 22:35:23,882 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 247 [2018-10-26 22:35:23,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:23,883 INFO L225 Difference]: With dead ends: 256 [2018-10-26 22:35:23,883 INFO L226 Difference]: Without dead ends: 252 [2018-10-26 22:35:23,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-26 22:35:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-10-26 22:35:23,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2018-10-26 22:35:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-26 22:35:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-10-26 22:35:23,886 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 247 [2018-10-26 22:35:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:23,887 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-10-26 22:35:23,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-26 22:35:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-10-26 22:35:23,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-10-26 22:35:23,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:23,888 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 81, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:23,888 INFO L424 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:23,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:23,888 INFO L82 PathProgramCache]: Analyzing trace with hash -70832501, now seen corresponding path program 81 times [2018-10-26 22:35:23,888 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:23,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:23,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:23,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:23,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:26,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:26,346 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:26,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:35:26,448 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-26 22:35:26,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:26,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:26,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:26,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-26 22:35:26,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-26 22:35:26,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-26 22:35:26,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-26 22:35:26,528 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 84 states. [2018-10-26 22:35:26,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:26,934 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2018-10-26 22:35:26,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-26 22:35:26,934 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 250 [2018-10-26 22:35:26,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:26,935 INFO L225 Difference]: With dead ends: 259 [2018-10-26 22:35:26,935 INFO L226 Difference]: Without dead ends: 255 [2018-10-26 22:35:26,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-26 22:35:26,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-26 22:35:26,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2018-10-26 22:35:26,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-10-26 22:35:26,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 254 transitions. [2018-10-26 22:35:26,947 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 254 transitions. Word has length 250 [2018-10-26 22:35:26,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:26,948 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 254 transitions. [2018-10-26 22:35:26,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-26 22:35:26,948 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 254 transitions. [2018-10-26 22:35:26,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-26 22:35:26,949 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:26,949 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 82, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:26,949 INFO L424 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:26,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:26,950 INFO L82 PathProgramCache]: Analyzing trace with hash 305096205, now seen corresponding path program 82 times [2018-10-26 22:35:26,950 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:26,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:26,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:26,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:26,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:29,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:29,744 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:29,751 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:35:29,789 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:35:29,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:29,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:29,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:29,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-26 22:35:29,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-26 22:35:29,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-26 22:35:29,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-26 22:35:29,901 INFO L87 Difference]: Start difference. First operand 254 states and 254 transitions. Second operand 85 states. [2018-10-26 22:35:30,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:30,219 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2018-10-26 22:35:30,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-26 22:35:30,220 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 253 [2018-10-26 22:35:30,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:30,221 INFO L225 Difference]: With dead ends: 262 [2018-10-26 22:35:30,222 INFO L226 Difference]: Without dead ends: 258 [2018-10-26 22:35:30,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-26 22:35:30,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-10-26 22:35:30,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2018-10-26 22:35:30,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-10-26 22:35:30,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2018-10-26 22:35:30,225 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 253 [2018-10-26 22:35:30,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:30,225 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2018-10-26 22:35:30,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-26 22:35:30,225 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2018-10-26 22:35:30,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-10-26 22:35:30,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:30,226 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 83, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:30,227 INFO L424 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:30,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:30,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1677531317, now seen corresponding path program 83 times [2018-10-26 22:35:30,227 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:30,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:30,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:30,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:30,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:32,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:32,943 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:32,950 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:35:33,037 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-26 22:35:33,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:33,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:33,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:33,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-26 22:35:33,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-26 22:35:33,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-26 22:35:33,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-26 22:35:33,116 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 86 states. [2018-10-26 22:35:33,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:33,425 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-10-26 22:35:33,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-26 22:35:33,426 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 256 [2018-10-26 22:35:33,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:33,427 INFO L225 Difference]: With dead ends: 265 [2018-10-26 22:35:33,427 INFO L226 Difference]: Without dead ends: 261 [2018-10-26 22:35:33,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-26 22:35:33,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-10-26 22:35:33,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2018-10-26 22:35:33,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-10-26 22:35:33,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 260 transitions. [2018-10-26 22:35:33,432 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 260 transitions. Word has length 256 [2018-10-26 22:35:33,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:33,433 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 260 transitions. [2018-10-26 22:35:33,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-26 22:35:33,433 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 260 transitions. [2018-10-26 22:35:33,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-10-26 22:35:33,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:33,434 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 84, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:33,434 INFO L424 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:33,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:33,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1743784627, now seen corresponding path program 84 times [2018-10-26 22:35:33,435 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:33,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:33,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:33,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:33,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:36,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:36,006 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:36,015 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:35:36,104 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-26 22:35:36,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:36,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:36,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:36,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-26 22:35:36,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-26 22:35:36,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-26 22:35:36,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-26 22:35:36,184 INFO L87 Difference]: Start difference. First operand 260 states and 260 transitions. Second operand 87 states. [2018-10-26 22:35:36,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:36,489 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2018-10-26 22:35:36,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-26 22:35:36,490 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 259 [2018-10-26 22:35:36,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:36,491 INFO L225 Difference]: With dead ends: 268 [2018-10-26 22:35:36,492 INFO L226 Difference]: Without dead ends: 264 [2018-10-26 22:35:36,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-26 22:35:36,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-10-26 22:35:36,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2018-10-26 22:35:36,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-26 22:35:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-10-26 22:35:36,496 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 259 [2018-10-26 22:35:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:36,497 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-10-26 22:35:36,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-26 22:35:36,497 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-10-26 22:35:36,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-26 22:35:36,498 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:36,498 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 85, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:36,498 INFO L424 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:36,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:36,498 INFO L82 PathProgramCache]: Analyzing trace with hash 188813323, now seen corresponding path program 85 times [2018-10-26 22:35:36,498 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:36,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:36,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:36,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:36,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:39,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:39,379 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:39,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:35:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:39,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:39,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:39,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-26 22:35:39,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-26 22:35:39,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-26 22:35:39,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-26 22:35:39,509 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 88 states. [2018-10-26 22:35:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:39,952 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2018-10-26 22:35:39,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-26 22:35:39,952 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 262 [2018-10-26 22:35:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:39,953 INFO L225 Difference]: With dead ends: 271 [2018-10-26 22:35:39,953 INFO L226 Difference]: Without dead ends: 267 [2018-10-26 22:35:39,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-26 22:35:39,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-26 22:35:39,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2018-10-26 22:35:39,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-10-26 22:35:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 266 transitions. [2018-10-26 22:35:39,957 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 266 transitions. Word has length 262 [2018-10-26 22:35:39,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:39,957 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 266 transitions. [2018-10-26 22:35:39,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-26 22:35:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 266 transitions. [2018-10-26 22:35:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-10-26 22:35:39,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:39,959 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 86, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:39,959 INFO L424 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:39,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:39,959 INFO L82 PathProgramCache]: Analyzing trace with hash 177738893, now seen corresponding path program 86 times [2018-10-26 22:35:39,960 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:39,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:39,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:39,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:35:39,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:42,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:42,739 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:42,749 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:35:42,794 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:35:42,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:42,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:42,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:42,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-26 22:35:42,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-26 22:35:42,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-26 22:35:42,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-26 22:35:42,876 INFO L87 Difference]: Start difference. First operand 266 states and 266 transitions. Second operand 89 states. [2018-10-26 22:35:43,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:43,388 INFO L93 Difference]: Finished difference Result 274 states and 274 transitions. [2018-10-26 22:35:43,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-26 22:35:43,388 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 265 [2018-10-26 22:35:43,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:43,389 INFO L225 Difference]: With dead ends: 274 [2018-10-26 22:35:43,389 INFO L226 Difference]: Without dead ends: 270 [2018-10-26 22:35:43,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-26 22:35:43,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-10-26 22:35:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2018-10-26 22:35:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-10-26 22:35:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2018-10-26 22:35:43,393 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 265 [2018-10-26 22:35:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:43,393 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2018-10-26 22:35:43,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-26 22:35:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2018-10-26 22:35:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-10-26 22:35:43,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:43,394 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 87, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:43,394 INFO L424 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:43,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:43,395 INFO L82 PathProgramCache]: Analyzing trace with hash 971876555, now seen corresponding path program 87 times [2018-10-26 22:35:43,395 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:43,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:43,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:43,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:43,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:46,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:46,221 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:46,228 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:35:46,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-26 22:35:46,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:46,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:46,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:46,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-26 22:35:46,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-26 22:35:46,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-26 22:35:46,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-26 22:35:46,413 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand 90 states. [2018-10-26 22:35:46,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:46,776 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-10-26 22:35:46,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-26 22:35:46,776 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 268 [2018-10-26 22:35:46,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:46,778 INFO L225 Difference]: With dead ends: 277 [2018-10-26 22:35:46,778 INFO L226 Difference]: Without dead ends: 273 [2018-10-26 22:35:46,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-26 22:35:46,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-10-26 22:35:46,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2018-10-26 22:35:46,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2018-10-26 22:35:46,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 272 transitions. [2018-10-26 22:35:46,781 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 272 transitions. Word has length 268 [2018-10-26 22:35:46,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:46,782 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 272 transitions. [2018-10-26 22:35:46,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-26 22:35:46,782 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 272 transitions. [2018-10-26 22:35:46,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-10-26 22:35:46,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:46,783 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 88, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:46,783 INFO L424 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:46,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:46,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1847868467, now seen corresponding path program 88 times [2018-10-26 22:35:46,783 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:46,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:46,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:46,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:46,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:49,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:49,655 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:49,671 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:35:49,714 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:35:49,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:49,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:49,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:49,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-26 22:35:49,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-26 22:35:49,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-26 22:35:49,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-26 22:35:49,797 INFO L87 Difference]: Start difference. First operand 272 states and 272 transitions. Second operand 91 states. [2018-10-26 22:35:50,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:50,224 INFO L93 Difference]: Finished difference Result 280 states and 280 transitions. [2018-10-26 22:35:50,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-26 22:35:50,225 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 271 [2018-10-26 22:35:50,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:50,226 INFO L225 Difference]: With dead ends: 280 [2018-10-26 22:35:50,226 INFO L226 Difference]: Without dead ends: 276 [2018-10-26 22:35:50,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-26 22:35:50,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-10-26 22:35:50,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2018-10-26 22:35:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-10-26 22:35:50,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-10-26 22:35:50,230 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 271 [2018-10-26 22:35:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:50,230 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-10-26 22:35:50,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-26 22:35:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-10-26 22:35:50,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-10-26 22:35:50,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:50,231 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 89, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:50,231 INFO L424 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:50,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:50,232 INFO L82 PathProgramCache]: Analyzing trace with hash 393523595, now seen corresponding path program 89 times [2018-10-26 22:35:50,232 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:50,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:50,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:50,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:50,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:53,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:53,058 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:53,066 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:35:53,291 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-26 22:35:53,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:53,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:53,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:53,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-26 22:35:53,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-26 22:35:53,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-26 22:35:53,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-26 22:35:53,376 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 92 states. [2018-10-26 22:35:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:53,938 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2018-10-26 22:35:53,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-26 22:35:53,938 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 274 [2018-10-26 22:35:53,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:53,939 INFO L225 Difference]: With dead ends: 283 [2018-10-26 22:35:53,939 INFO L226 Difference]: Without dead ends: 279 [2018-10-26 22:35:53,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-26 22:35:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-26 22:35:53,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 278. [2018-10-26 22:35:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2018-10-26 22:35:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 278 transitions. [2018-10-26 22:35:53,943 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 278 transitions. Word has length 274 [2018-10-26 22:35:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:53,943 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 278 transitions. [2018-10-26 22:35:53,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-26 22:35:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 278 transitions. [2018-10-26 22:35:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-10-26 22:35:53,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:53,944 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 90, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:53,944 INFO L424 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:53,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:53,944 INFO L82 PathProgramCache]: Analyzing trace with hash -152108275, now seen corresponding path program 90 times [2018-10-26 22:35:53,945 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:53,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:53,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:53,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:53,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:56,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:56,868 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:56,875 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:35:56,977 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-26 22:35:56,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:56,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:57,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:57,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-26 22:35:57,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-26 22:35:57,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-26 22:35:57,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-26 22:35:57,064 INFO L87 Difference]: Start difference. First operand 278 states and 278 transitions. Second operand 93 states. [2018-10-26 22:35:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:57,636 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2018-10-26 22:35:57,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-26 22:35:57,636 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 277 [2018-10-26 22:35:57,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:57,637 INFO L225 Difference]: With dead ends: 286 [2018-10-26 22:35:57,637 INFO L226 Difference]: Without dead ends: 282 [2018-10-26 22:35:57,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-26 22:35:57,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-10-26 22:35:57,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2018-10-26 22:35:57,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-10-26 22:35:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2018-10-26 22:35:57,641 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 277 [2018-10-26 22:35:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:57,641 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2018-10-26 22:35:57,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-26 22:35:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2018-10-26 22:35:57,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-10-26 22:35:57,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:57,642 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 91, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:57,642 INFO L424 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:57,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:57,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1380067915, now seen corresponding path program 91 times [2018-10-26 22:35:57,643 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:57,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:57,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:57,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:57,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:36:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:00,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:36:00,614 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:36:00,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:36:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:36:00,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:36:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:00,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:36:00,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-26 22:36:00,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-26 22:36:00,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-26 22:36:00,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-26 22:36:00,768 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand 94 states. [2018-10-26 22:36:01,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:36:01,339 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-10-26 22:36:01,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-26 22:36:01,339 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 280 [2018-10-26 22:36:01,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:36:01,341 INFO L225 Difference]: With dead ends: 289 [2018-10-26 22:36:01,341 INFO L226 Difference]: Without dead ends: 285 [2018-10-26 22:36:01,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-26 22:36:01,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-10-26 22:36:01,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2018-10-26 22:36:01,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-10-26 22:36:01,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 284 transitions. [2018-10-26 22:36:01,344 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 284 transitions. Word has length 280 [2018-10-26 22:36:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:36:01,344 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 284 transitions. [2018-10-26 22:36:01,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-26 22:36:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 284 transitions. [2018-10-26 22:36:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-10-26 22:36:01,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:36:01,345 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 92, 1, 1, 1, 1, 1, 1] [2018-10-26 22:36:01,346 INFO L424 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:36:01,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:36:01,346 INFO L82 PathProgramCache]: Analyzing trace with hash -471477683, now seen corresponding path program 92 times [2018-10-26 22:36:01,346 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:36:01,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:36:01,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:01,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:36:01,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:36:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:05,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:36:05,178 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:36:05,185 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:36:05,232 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:36:05,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:36:05,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:36:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:05,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:36:05,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-26 22:36:05,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-26 22:36:05,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-26 22:36:05,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-26 22:36:05,317 INFO L87 Difference]: Start difference. First operand 284 states and 284 transitions. Second operand 95 states. [2018-10-26 22:36:05,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:36:05,791 INFO L93 Difference]: Finished difference Result 292 states and 292 transitions. [2018-10-26 22:36:05,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-26 22:36:05,791 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 283 [2018-10-26 22:36:05,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:36:05,793 INFO L225 Difference]: With dead ends: 292 [2018-10-26 22:36:05,793 INFO L226 Difference]: Without dead ends: 288 [2018-10-26 22:36:05,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-26 22:36:05,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-10-26 22:36:05,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2018-10-26 22:36:05,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-10-26 22:36:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2018-10-26 22:36:05,798 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 283 [2018-10-26 22:36:05,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:36:05,798 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2018-10-26 22:36:05,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-26 22:36:05,798 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2018-10-26 22:36:05,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-10-26 22:36:05,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:36:05,799 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 93, 1, 1, 1, 1, 1, 1] [2018-10-26 22:36:05,799 INFO L424 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:36:05,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:36:05,800 INFO L82 PathProgramCache]: Analyzing trace with hash 398594827, now seen corresponding path program 93 times [2018-10-26 22:36:05,800 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:36:05,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:36:05,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:05,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:36:05,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:36:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:08,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:36:08,861 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:36:08,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:36:08,981 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-26 22:36:08,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:36:08,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:36:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:09,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:36:09,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-26 22:36:09,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-26 22:36:09,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-26 22:36:09,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-26 22:36:09,070 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 96 states. [2018-10-26 22:36:09,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:36:09,447 INFO L93 Difference]: Finished difference Result 295 states and 295 transitions. [2018-10-26 22:36:09,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-26 22:36:09,448 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 286 [2018-10-26 22:36:09,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:36:09,449 INFO L225 Difference]: With dead ends: 295 [2018-10-26 22:36:09,449 INFO L226 Difference]: Without dead ends: 291 [2018-10-26 22:36:09,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-26 22:36:09,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-26 22:36:09,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2018-10-26 22:36:09,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-10-26 22:36:09,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 290 transitions. [2018-10-26 22:36:09,452 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 290 transitions. Word has length 286 [2018-10-26 22:36:09,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:36:09,453 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 290 transitions. [2018-10-26 22:36:09,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-26 22:36:09,453 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 290 transitions. [2018-10-26 22:36:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-10-26 22:36:09,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:36:09,454 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 94, 1, 1, 1, 1, 1, 1] [2018-10-26 22:36:09,454 INFO L424 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:36:09,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:36:09,454 INFO L82 PathProgramCache]: Analyzing trace with hash 601108877, now seen corresponding path program 94 times [2018-10-26 22:36:09,454 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:36:09,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:36:09,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:09,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:36:09,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:36:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:12,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:36:12,602 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:36:12,610 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:36:12,656 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:36:12,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:36:12,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:36:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:12,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:36:12,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-26 22:36:12,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-26 22:36:12,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-26 22:36:12,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-26 22:36:12,765 INFO L87 Difference]: Start difference. First operand 290 states and 290 transitions. Second operand 97 states. [2018-10-26 22:36:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:36:13,388 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2018-10-26 22:36:13,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-26 22:36:13,388 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 289 [2018-10-26 22:36:13,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:36:13,389 INFO L225 Difference]: With dead ends: 298 [2018-10-26 22:36:13,390 INFO L226 Difference]: Without dead ends: 294 [2018-10-26 22:36:13,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-26 22:36:13,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-10-26 22:36:13,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2018-10-26 22:36:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-10-26 22:36:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2018-10-26 22:36:13,393 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 289 [2018-10-26 22:36:13,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:36:13,393 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2018-10-26 22:36:13,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-26 22:36:13,394 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2018-10-26 22:36:13,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-10-26 22:36:13,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:36:13,395 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 95, 1, 1, 1, 1, 1, 1] [2018-10-26 22:36:13,395 INFO L424 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:36:13,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:36:13,395 INFO L82 PathProgramCache]: Analyzing trace with hash -731878453, now seen corresponding path program 95 times [2018-10-26 22:36:13,395 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:36:13,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:36:13,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:13,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:36:13,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:36:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:16,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:36:16,633 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:36:16,645 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:36:16,790 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-26 22:36:16,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:36:16,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:36:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:16,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:36:16,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-26 22:36:16,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-26 22:36:16,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-26 22:36:16,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-26 22:36:16,883 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 98 states. [2018-10-26 22:36:17,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:36:17,381 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2018-10-26 22:36:17,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-26 22:36:17,381 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 292 [2018-10-26 22:36:17,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:36:17,382 INFO L225 Difference]: With dead ends: 301 [2018-10-26 22:36:17,382 INFO L226 Difference]: Without dead ends: 297 [2018-10-26 22:36:17,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-26 22:36:17,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-10-26 22:36:17,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2018-10-26 22:36:17,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-10-26 22:36:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 296 transitions. [2018-10-26 22:36:17,387 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 296 transitions. Word has length 292 [2018-10-26 22:36:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:36:17,387 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 296 transitions. [2018-10-26 22:36:17,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-26 22:36:17,387 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 296 transitions. [2018-10-26 22:36:17,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-10-26 22:36:17,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:36:17,388 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 96, 1, 1, 1, 1, 1, 1] [2018-10-26 22:36:17,388 INFO L424 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:36:17,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:36:17,388 INFO L82 PathProgramCache]: Analyzing trace with hash -489807667, now seen corresponding path program 96 times [2018-10-26 22:36:17,389 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:36:17,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:36:17,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:17,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:36:17,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:36:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:20,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:36:20,669 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:36:20,679 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:36:20,786 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-26 22:36:20,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:36:20,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:36:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:20,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:36:20,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-26 22:36:20,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-26 22:36:20,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-26 22:36:20,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-26 22:36:20,891 INFO L87 Difference]: Start difference. First operand 296 states and 296 transitions. Second operand 99 states. [2018-10-26 22:36:21,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:36:21,308 INFO L93 Difference]: Finished difference Result 304 states and 304 transitions. [2018-10-26 22:36:21,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-26 22:36:21,308 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 295 [2018-10-26 22:36:21,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:36:21,309 INFO L225 Difference]: With dead ends: 304 [2018-10-26 22:36:21,309 INFO L226 Difference]: Without dead ends: 300 [2018-10-26 22:36:21,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-26 22:36:21,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2018-10-26 22:36:21,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2018-10-26 22:36:21,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-10-26 22:36:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2018-10-26 22:36:21,313 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 295 [2018-10-26 22:36:21,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:36:21,314 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2018-10-26 22:36:21,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-26 22:36:21,314 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2018-10-26 22:36:21,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-26 22:36:21,315 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:36:21,315 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 97, 1, 1, 1, 1, 1, 1] [2018-10-26 22:36:21,315 INFO L424 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:36:21,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:36:21,315 INFO L82 PathProgramCache]: Analyzing trace with hash -209111925, now seen corresponding path program 97 times [2018-10-26 22:36:21,315 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:36:21,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:36:21,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:21,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:36:21,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:36:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:24,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:36:24,635 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:36:24,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:36:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:36:24,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:36:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:24,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:36:24,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-26 22:36:24,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-26 22:36:24,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-26 22:36:24,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-26 22:36:24,791 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 100 states. [2018-10-26 22:36:25,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:36:25,256 INFO L93 Difference]: Finished difference Result 307 states and 307 transitions. [2018-10-26 22:36:25,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-26 22:36:25,256 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 298 [2018-10-26 22:36:25,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:36:25,257 INFO L225 Difference]: With dead ends: 307 [2018-10-26 22:36:25,258 INFO L226 Difference]: Without dead ends: 303 [2018-10-26 22:36:25,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-26 22:36:25,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-26 22:36:25,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 302. [2018-10-26 22:36:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-10-26 22:36:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 302 transitions. [2018-10-26 22:36:25,261 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 302 transitions. Word has length 298 [2018-10-26 22:36:25,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:36:25,261 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 302 transitions. [2018-10-26 22:36:25,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-26 22:36:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 302 transitions. [2018-10-26 22:36:25,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-10-26 22:36:25,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:36:25,263 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 98, 1, 1, 1, 1, 1, 1] [2018-10-26 22:36:25,263 INFO L424 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:36:25,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:36:25,263 INFO L82 PathProgramCache]: Analyzing trace with hash -303587315, now seen corresponding path program 98 times [2018-10-26 22:36:25,263 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:36:25,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:36:25,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:25,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:36:25,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:36:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:28,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:36:28,639 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:36:28,646 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:36:28,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:36:28,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:36:28,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:36:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:28,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:36:28,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-26 22:36:28,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-26 22:36:28,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-26 22:36:28,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-26 22:36:28,787 INFO L87 Difference]: Start difference. First operand 302 states and 302 transitions. Second operand 101 states. [2018-10-26 22:36:29,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:36:29,257 INFO L93 Difference]: Finished difference Result 310 states and 310 transitions. [2018-10-26 22:36:29,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-26 22:36:29,258 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 301 [2018-10-26 22:36:29,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:36:29,259 INFO L225 Difference]: With dead ends: 310 [2018-10-26 22:36:29,259 INFO L226 Difference]: Without dead ends: 306 [2018-10-26 22:36:29,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-26 22:36:29,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2018-10-26 22:36:29,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2018-10-26 22:36:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-10-26 22:36:29,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 305 transitions. [2018-10-26 22:36:29,262 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 305 transitions. Word has length 301 [2018-10-26 22:36:29,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:36:29,263 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 305 transitions. [2018-10-26 22:36:29,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-26 22:36:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 305 transitions. [2018-10-26 22:36:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-10-26 22:36:29,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:36:29,264 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 99, 1, 1, 1, 1, 1, 1] [2018-10-26 22:36:29,264 INFO L424 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:36:29,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:36:29,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1616351925, now seen corresponding path program 99 times [2018-10-26 22:36:29,265 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:36:29,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:36:29,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:29,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:36:29,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:36:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:32,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:36:32,758 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:36:32,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:36:32,887 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-10-26 22:36:32,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:36:32,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:36:32,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:33,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:36:33,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-26 22:36:33,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-26 22:36:33,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-26 22:36:33,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-26 22:36:33,002 INFO L87 Difference]: Start difference. First operand 305 states and 305 transitions. Second operand 102 states. [2018-10-26 22:36:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:36:33,501 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-10-26 22:36:33,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-26 22:36:33,505 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 304 [2018-10-26 22:36:33,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:36:33,506 INFO L225 Difference]: With dead ends: 313 [2018-10-26 22:36:33,506 INFO L226 Difference]: Without dead ends: 309 [2018-10-26 22:36:33,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-26 22:36:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-10-26 22:36:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2018-10-26 22:36:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-10-26 22:36:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 308 transitions. [2018-10-26 22:36:33,511 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 308 transitions. Word has length 304 [2018-10-26 22:36:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:36:33,511 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 308 transitions. [2018-10-26 22:36:33,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-26 22:36:33,512 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 308 transitions. [2018-10-26 22:36:33,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-10-26 22:36:33,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:36:33,513 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 100, 1, 1, 1, 1, 1, 1] [2018-10-26 22:36:33,513 INFO L424 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:36:33,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:36:33,514 INFO L82 PathProgramCache]: Analyzing trace with hash -214651059, now seen corresponding path program 100 times [2018-10-26 22:36:33,514 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:36:33,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:36:33,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:33,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:36:33,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:36:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 15050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:37,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:36:37,058 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:36:37,068 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:36:37,118 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:36:37,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:36:37,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:36:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 15050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:37,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:36:37,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-26 22:36:37,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-26 22:36:37,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-26 22:36:37,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-26 22:36:37,218 INFO L87 Difference]: Start difference. First operand 308 states and 308 transitions. Second operand 103 states. [2018-10-26 22:36:37,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:36:37,940 INFO L93 Difference]: Finished difference Result 316 states and 316 transitions. [2018-10-26 22:36:37,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-26 22:36:37,940 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 307 [2018-10-26 22:36:37,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:36:37,941 INFO L225 Difference]: With dead ends: 316 [2018-10-26 22:36:37,941 INFO L226 Difference]: Without dead ends: 312 [2018-10-26 22:36:37,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-26 22:36:37,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-10-26 22:36:37,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2018-10-26 22:36:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-10-26 22:36:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2018-10-26 22:36:37,945 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 307 [2018-10-26 22:36:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:36:37,945 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2018-10-26 22:36:37,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-26 22:36:37,945 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2018-10-26 22:36:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-26 22:36:37,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:36:37,946 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 101, 1, 1, 1, 1, 1, 1] [2018-10-26 22:36:37,946 INFO L424 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:36:37,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:36:37,946 INFO L82 PathProgramCache]: Analyzing trace with hash -2111171061, now seen corresponding path program 101 times [2018-10-26 22:36:37,947 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:36:37,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:36:37,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:37,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:36:37,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:36:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 0 proven. 15352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:41,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:36:41,617 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:36:41,623 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:36:41,735 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-10-26 22:36:41,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:36:41,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:36:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 0 proven. 15352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:41,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:36:41,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-26 22:36:41,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-26 22:36:41,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-26 22:36:41,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-26 22:36:41,829 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand 104 states. [2018-10-26 22:36:42,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:36:42,235 INFO L93 Difference]: Finished difference Result 319 states and 319 transitions. [2018-10-26 22:36:42,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-26 22:36:42,235 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 310 [2018-10-26 22:36:42,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:36:42,236 INFO L225 Difference]: With dead ends: 319 [2018-10-26 22:36:42,237 INFO L226 Difference]: Without dead ends: 315 [2018-10-26 22:36:42,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-26 22:36:42,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-26 22:36:42,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2018-10-26 22:36:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-10-26 22:36:42,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 314 transitions. [2018-10-26 22:36:42,242 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 314 transitions. Word has length 310 [2018-10-26 22:36:42,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:36:42,243 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 314 transitions. [2018-10-26 22:36:42,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-26 22:36:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 314 transitions. [2018-10-26 22:36:42,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-10-26 22:36:42,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:36:42,245 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 102, 1, 1, 1, 1, 1, 1] [2018-10-26 22:36:42,245 INFO L424 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:36:42,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:36:42,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1043771763, now seen corresponding path program 102 times [2018-10-26 22:36:42,245 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:36:42,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:36:42,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:42,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:36:42,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:36:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 15657 backedges. 0 proven. 15657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:45,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:36:45,972 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:36:45,980 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:36:46,101 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-10-26 22:36:46,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:36:46,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:36:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 15657 backedges. 0 proven. 15657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:46,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:36:46,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-26 22:36:46,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-26 22:36:46,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-26 22:36:46,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-26 22:36:46,228 INFO L87 Difference]: Start difference. First operand 314 states and 314 transitions. Second operand 105 states. [2018-10-26 22:36:47,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:36:47,014 INFO L93 Difference]: Finished difference Result 322 states and 322 transitions. [2018-10-26 22:36:47,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-26 22:36:47,015 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 313 [2018-10-26 22:36:47,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:36:47,015 INFO L225 Difference]: With dead ends: 322 [2018-10-26 22:36:47,015 INFO L226 Difference]: Without dead ends: 318 [2018-10-26 22:36:47,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-26 22:36:47,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-10-26 22:36:47,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 317. [2018-10-26 22:36:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-10-26 22:36:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2018-10-26 22:36:47,020 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 313 [2018-10-26 22:36:47,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:36:47,020 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2018-10-26 22:36:47,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-26 22:36:47,020 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2018-10-26 22:36:47,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-10-26 22:36:47,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:36:47,022 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 103, 1, 1, 1, 1, 1, 1] [2018-10-26 22:36:47,022 INFO L424 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:36:47,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:36:47,022 INFO L82 PathProgramCache]: Analyzing trace with hash -2089144629, now seen corresponding path program 103 times [2018-10-26 22:36:47,023 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:36:47,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:36:47,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:47,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:36:47,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:36:50,804 INFO L134 CoverageAnalysis]: Checked inductivity of 15965 backedges. 0 proven. 15965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:50,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:36:50,804 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:36:50,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:36:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:36:50,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:36:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15965 backedges. 0 proven. 15965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:50,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:36:50,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-26 22:36:50,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-26 22:36:50,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-26 22:36:50,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-26 22:36:50,959 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand 106 states. [2018-10-26 22:36:51,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:36:51,639 INFO L93 Difference]: Finished difference Result 325 states and 325 transitions. [2018-10-26 22:36:51,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-26 22:36:51,639 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 316 [2018-10-26 22:36:51,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:36:51,640 INFO L225 Difference]: With dead ends: 325 [2018-10-26 22:36:51,640 INFO L226 Difference]: Without dead ends: 321 [2018-10-26 22:36:51,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-26 22:36:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2018-10-26 22:36:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 320. [2018-10-26 22:36:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2018-10-26 22:36:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 320 transitions. [2018-10-26 22:36:51,645 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 320 transitions. Word has length 316 [2018-10-26 22:36:51,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:36:51,645 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 320 transitions. [2018-10-26 22:36:51,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-26 22:36:51,645 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 320 transitions. [2018-10-26 22:36:51,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-10-26 22:36:51,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:36:51,647 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 104, 1, 1, 1, 1, 1, 1] [2018-10-26 22:36:51,647 INFO L424 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:36:51,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:36:51,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1984332339, now seen corresponding path program 104 times [2018-10-26 22:36:51,647 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:36:51,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:36:51,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:51,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:36:51,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:36:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16276 backedges. 0 proven. 16276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:55,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:36:55,566 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:36:55,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:36:55,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:36:55,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:36:55,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:36:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16276 backedges. 0 proven. 16276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:36:55,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:36:55,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-26 22:36:55,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-26 22:36:55,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-26 22:36:55,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-26 22:36:55,760 INFO L87 Difference]: Start difference. First operand 320 states and 320 transitions. Second operand 107 states. [2018-10-26 22:36:56,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:36:56,334 INFO L93 Difference]: Finished difference Result 328 states and 328 transitions. [2018-10-26 22:36:56,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-26 22:36:56,335 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 319 [2018-10-26 22:36:56,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:36:56,335 INFO L225 Difference]: With dead ends: 328 [2018-10-26 22:36:56,335 INFO L226 Difference]: Without dead ends: 324 [2018-10-26 22:36:56,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-26 22:36:56,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2018-10-26 22:36:56,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2018-10-26 22:36:56,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-10-26 22:36:56,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2018-10-26 22:36:56,340 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 319 [2018-10-26 22:36:56,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:36:56,340 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2018-10-26 22:36:56,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-26 22:36:56,340 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2018-10-26 22:36:56,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-10-26 22:36:56,342 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:36:56,342 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 105, 1, 1, 1, 1, 1, 1] [2018-10-26 22:36:56,342 INFO L424 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:36:56,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:36:56,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1962625141, now seen corresponding path program 105 times [2018-10-26 22:36:56,342 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:36:56,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:36:56,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:56,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:36:56,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:36:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:37:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16590 backedges. 0 proven. 16590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:37:00,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:37:00,236 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:37:00,243 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:37:00,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-10-26 22:37:00,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:37:00,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:37:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16590 backedges. 0 proven. 16590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:37:00,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:37:00,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-26 22:37:00,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-26 22:37:00,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-26 22:37:00,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-26 22:37:00,484 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 108 states. [2018-10-26 22:37:01,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:37:01,141 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2018-10-26 22:37:01,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-26 22:37:01,141 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 322 [2018-10-26 22:37:01,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:37:01,142 INFO L225 Difference]: With dead ends: 331 [2018-10-26 22:37:01,142 INFO L226 Difference]: Without dead ends: 327 [2018-10-26 22:37:01,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-26 22:37:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-26 22:37:01,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 326. [2018-10-26 22:37:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2018-10-26 22:37:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 326 transitions. [2018-10-26 22:37:01,145 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 326 transitions. Word has length 322 [2018-10-26 22:37:01,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:37:01,146 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 326 transitions. [2018-10-26 22:37:01,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-26 22:37:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 326 transitions. [2018-10-26 22:37:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-10-26 22:37:01,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:37:01,147 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 106, 1, 1, 1, 1, 1, 1] [2018-10-26 22:37:01,147 INFO L424 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:37:01,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:37:01,147 INFO L82 PathProgramCache]: Analyzing trace with hash 471416077, now seen corresponding path program 106 times [2018-10-26 22:37:01,147 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:37:01,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:37:01,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:37:01,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:37:01,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:37:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-26 22:37:04,796 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 22:37:04,799 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 22:37:04,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 10:37:04 BoogieIcfgContainer [2018-10-26 22:37:04,800 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 22:37:04,800 INFO L168 Benchmark]: Toolchain (without parser) took 229143.79 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 664.8 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -411.6 MB). Peak memory consumption was 253.2 MB. Max. memory is 7.1 GB. [2018-10-26 22:37:04,802 INFO L168 Benchmark]: CDTParser took 0.22 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. [2018-10-26 22:37:04,802 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.76 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-26 22:37:04,802 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.54 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 22:37:04,802 INFO L168 Benchmark]: Boogie Preprocessor took 16.76 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 22:37:04,803 INFO L168 Benchmark]: RCFGBuilder took 274.19 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -797.8 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2018-10-26 22:37:04,803 INFO L168 Benchmark]: TraceAbstraction took 228538.22 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -91.8 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 375.7 MB). Peak memory consumption was 284.0 MB. Max. memory is 7.1 GB. [2018-10-26 22:37:04,804 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 275.76 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 34.54 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 16.76 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 274.19 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -797.8 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 228538.22 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -91.8 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 375.7 MB). Peak memory consumption was 284.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 326 with TraceHistMax 107,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 105 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. TIMEOUT Result, 228.4s OverallTime, 108 OverallIterations, 107 TraceHistogramMax, 34.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 755 SDtfs, 5671 SDslu, 15838 SDs, 0 SdLazy, 18332 SolverSat, 168 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23210 GetRequests, 17539 SyntacticMatches, 0 SemanticMatches, 5671 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 170.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=326occurred in iteration=107, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 107 MinimizatonAttempts, 106 StatesRemovedByMinimization, 106 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 6.1s SatisfiabilityAnalysisTime, 176.8s InterpolantComputationTime, 34873 NumberOfCodeBlocks, 34873 NumberOfCodeBlocksAsserted, 3038 NumberOfCheckSat, 34661 ConstructedInterpolants, 0 QuantifiedInterpolants, 22083475 SizeOfPredicates, 105 NumberOfNonLiveVariables, 23730 ConjunctsInSsa, 5775 ConjunctsInUnsatCore, 212 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1179780 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown