java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/functions_true-unreach-call1_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b6335f6 [2018-10-23 09:33:58,503 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 09:33:58,505 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 09:33:58,517 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 09:33:58,517 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 09:33:58,519 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 09:33:58,520 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 09:33:58,522 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 09:33:58,523 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 09:33:58,524 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 09:33:58,525 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 09:33:58,525 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 09:33:58,526 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 09:33:58,527 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 09:33:58,528 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 09:33:58,529 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 09:33:58,530 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 09:33:58,532 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 09:33:58,534 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 09:33:58,535 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 09:33:58,536 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 09:33:58,538 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 09:33:58,540 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 09:33:58,549 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 09:33:58,565 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 09:33:58,565 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 09:33:58,566 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 09:33:58,566 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 09:33:58,567 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 09:33:58,567 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 09:33:58,567 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 09:33:58,567 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 09:33:58,567 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 09:33:58,568 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 09:33:58,568 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 09:33:58,568 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 09:33:58,568 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 09:33:58,568 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 09:33:58,569 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 09:33:58,569 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 09:33:58,569 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 09:33:58,569 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 09:33:58,569 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 09:33:58,570 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 09:33:58,570 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 09:33:58,570 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 09:33:58,570 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 09:33:58,570 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 09:33:58,570 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 09:33:58,571 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 09:33:58,571 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 09:33:58,571 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 09:33:58,617 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 09:33:58,634 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 09:33:58,638 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 09:33:58,640 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 09:33:58,640 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 09:33:58,641 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/functions_true-unreach-call1_true-termination.i [2018-10-23 09:33:58,709 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/501c51355/bc56775ec33f43e8ad2b774b3b96e43c/FLAGaa4776ba3 [2018-10-23 09:33:59,211 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 09:33:59,212 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_true-unreach-call1_true-termination.i [2018-10-23 09:33:59,218 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/501c51355/bc56775ec33f43e8ad2b774b3b96e43c/FLAGaa4776ba3 [2018-10-23 09:33:59,234 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/501c51355/bc56775ec33f43e8ad2b774b3b96e43c [2018-10-23 09:33:59,245 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 09:33:59,247 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 09:33:59,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 09:33:59,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 09:33:59,252 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 09:33:59,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:33:59" (1/1) ... [2018-10-23 09:33:59,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51be25fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:33:59, skipping insertion in model container [2018-10-23 09:33:59,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:33:59" (1/1) ... [2018-10-23 09:33:59,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 09:33:59,288 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 09:33:59,454 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 09:33:59,458 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 09:33:59,473 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 09:33:59,489 INFO L193 MainTranslator]: Completed translation [2018-10-23 09:33:59,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:33:59 WrapperNode [2018-10-23 09:33:59,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 09:33:59,491 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 09:33:59,491 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 09:33:59,491 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 09:33:59,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:33:59" (1/1) ... [2018-10-23 09:33:59,508 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:33:59" (1/1) ... [2018-10-23 09:33:59,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 09:33:59,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 09:33:59,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 09:33:59,532 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 09:33:59,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:33:59" (1/1) ... [2018-10-23 09:33:59,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:33:59" (1/1) ... [2018-10-23 09:33:59,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:33:59" (1/1) ... [2018-10-23 09:33:59,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:33:59" (1/1) ... [2018-10-23 09:33:59,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:33:59" (1/1) ... [2018-10-23 09:33:59,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:33:59" (1/1) ... [2018-10-23 09:33:59,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:33:59" (1/1) ... [2018-10-23 09:33:59,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 09:33:59,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 09:33:59,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 09:33:59,562 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 09:33:59,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:33:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 09:33:59,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 09:33:59,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 09:33:59,898 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 09:33:59,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:33:59 BoogieIcfgContainer [2018-10-23 09:33:59,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 09:33:59,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 09:33:59,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 09:33:59,905 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 09:33:59,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:33:59" (1/3) ... [2018-10-23 09:33:59,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72bf513c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:33:59, skipping insertion in model container [2018-10-23 09:33:59,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:33:59" (2/3) ... [2018-10-23 09:33:59,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72bf513c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:33:59, skipping insertion in model container [2018-10-23 09:33:59,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:33:59" (3/3) ... [2018-10-23 09:33:59,909 INFO L112 eAbstractionObserver]: Analyzing ICFG functions_true-unreach-call1_true-termination.i [2018-10-23 09:33:59,918 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 09:33:59,925 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 09:33:59,939 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 09:33:59,970 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 09:33:59,971 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 09:33:59,971 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 09:33:59,971 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 09:33:59,971 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 09:33:59,971 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 09:33:59,971 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 09:33:59,972 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 09:33:59,972 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 09:33:59,986 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-10-23 09:33:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-23 09:33:59,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:33:59,993 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-23 09:33:59,995 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:34:00,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:34:00,001 INFO L82 PathProgramCache]: Analyzing trace with hash 889845351, now seen corresponding path program 1 times [2018-10-23 09:34:00,003 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:34:00,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:34:00,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:00,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:34:00,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:34:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:00,110 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:34:00,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 09:34:00,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-23 09:34:00,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-23 09:34:00,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 09:34:00,133 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-10-23 09:34:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:34:00,149 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-10-23 09:34:00,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-23 09:34:00,150 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-23 09:34:00,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:34:00,160 INFO L225 Difference]: With dead ends: 21 [2018-10-23 09:34:00,160 INFO L226 Difference]: Without dead ends: 9 [2018-10-23 09:34:00,164 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 [2018-10-23 09:34:00,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-23 09:34:00,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-23 09:34:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-23 09:34:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-23 09:34:00,201 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-23 09:34:00,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:34:00,201 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-23 09:34:00,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-23 09:34:00,201 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-23 09:34:00,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-23 09:34:00,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:34:00,202 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:34:00,202 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:34:00,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:34:00,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1805925645, now seen corresponding path program 1 times [2018-10-23 09:34:00,203 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:34:00,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:34:00,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:00,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:34:00,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:34:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:00,410 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:34:00,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 09:34:00,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 09:34:00,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 09:34:00,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 09:34:00,413 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2018-10-23 09:34:00,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:34:00,507 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-23 09:34:00,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 09:34:00,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-23 09:34:00,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:34:00,508 INFO L225 Difference]: With dead ends: 16 [2018-10-23 09:34:00,509 INFO L226 Difference]: Without dead ends: 12 [2018-10-23 09:34:00,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 09:34:00,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-23 09:34:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-10-23 09:34:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-23 09:34:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-23 09:34:00,517 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2018-10-23 09:34:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:34:00,518 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-23 09:34:00,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 09:34:00,518 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-23 09:34:00,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-23 09:34:00,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:34:00,522 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:34:00,522 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:34:00,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:34:00,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1078158165, now seen corresponding path program 1 times [2018-10-23 09:34:00,523 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:34:00,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:34:00,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:00,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:34:00,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:34:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:00,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:34:00,861 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:34:00,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:34:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:34:00,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:34:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:00,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:34:00,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-23 09:34:00,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 09:34:00,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 09:34:00,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-23 09:34:00,976 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 5 states. [2018-10-23 09:34:01,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:34:01,138 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-23 09:34:01,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 09:34:01,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-10-23 09:34:01,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:34:01,141 INFO L225 Difference]: With dead ends: 19 [2018-10-23 09:34:01,142 INFO L226 Difference]: Without dead ends: 15 [2018-10-23 09:34:01,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-23 09:34:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-23 09:34:01,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-10-23 09:34:01,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-23 09:34:01,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-23 09:34:01,152 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2018-10-23 09:34:01,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:34:01,152 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-23 09:34:01,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 09:34:01,153 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-23 09:34:01,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-23 09:34:01,155 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:34:01,155 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-23 09:34:01,157 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:34:01,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:34:01,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1814605, now seen corresponding path program 2 times [2018-10-23 09:34:01,157 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:34:01,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:34:01,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:01,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:34:01,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:34:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:01,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:34:01,453 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:34:01,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:34:01,478 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:34:01,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:34:01,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:34:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:01,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:34:01,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-23 09:34:01,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 09:34:01,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 09:34:01,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-23 09:34:01,517 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2018-10-23 09:34:01,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:34:01,778 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-23 09:34:01,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 09:34:01,779 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-10-23 09:34:01,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:34:01,780 INFO L225 Difference]: With dead ends: 22 [2018-10-23 09:34:01,780 INFO L226 Difference]: Without dead ends: 18 [2018-10-23 09:34:01,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-10-23 09:34:01,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-23 09:34:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-23 09:34:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-23 09:34:01,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-23 09:34:01,793 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2018-10-23 09:34:01,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:34:01,793 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-23 09:34:01,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 09:34:01,793 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-23 09:34:01,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-23 09:34:01,795 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:34:01,795 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-23 09:34:01,795 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:34:01,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:34:01,796 INFO L82 PathProgramCache]: Analyzing trace with hash -129408661, now seen corresponding path program 3 times [2018-10-23 09:34:01,796 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:34:01,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:34:01,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:01,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:34:01,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:34:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:02,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:34:02,102 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:34:02,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:34:02,130 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-23 09:34:02,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:34:02,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:34:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:02,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:34:02,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-23 09:34:02,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 09:34:02,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 09:34:02,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-23 09:34:02,195 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-23 09:34:02,529 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-23 09:34:02,763 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-23 09:34:02,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:34:02,967 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-23 09:34:02,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 09:34:02,967 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-23 09:34:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:34:02,969 INFO L225 Difference]: With dead ends: 25 [2018-10-23 09:34:02,969 INFO L226 Difference]: Without dead ends: 21 [2018-10-23 09:34:02,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2018-10-23 09:34:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-23 09:34:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-10-23 09:34:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-23 09:34:02,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-23 09:34:02,975 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-10-23 09:34:02,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:34:02,975 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-23 09:34:02,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 09:34:02,975 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-23 09:34:02,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-23 09:34:02,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:34:02,976 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-23 09:34:02,976 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:34:02,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:34:02,977 INFO L82 PathProgramCache]: Analyzing trace with hash -981486707, now seen corresponding path program 4 times [2018-10-23 09:34:02,977 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:34:02,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:34:02,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:02,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:34:02,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:34:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:03,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:34:03,287 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:34:03,306 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:34:03,333 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:34:03,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:34:03,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:34:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:03,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:34:03,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-23 09:34:03,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 09:34:03,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 09:34:03,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-23 09:34:03,445 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2018-10-23 09:34:03,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:34:03,765 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-23 09:34:03,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-23 09:34:03,771 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-23 09:34:03,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:34:03,772 INFO L225 Difference]: With dead ends: 28 [2018-10-23 09:34:03,772 INFO L226 Difference]: Without dead ends: 24 [2018-10-23 09:34:03,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2018-10-23 09:34:03,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-23 09:34:03,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-10-23 09:34:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-23 09:34:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-23 09:34:03,777 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2018-10-23 09:34:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:34:03,778 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-23 09:34:03,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 09:34:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-23 09:34:03,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-23 09:34:03,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:34:03,779 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-23 09:34:03,779 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:34:03,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:34:03,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1981835733, now seen corresponding path program 5 times [2018-10-23 09:34:03,780 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:34:03,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:34:03,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:03,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:34:03,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:34:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:04,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:34:04,056 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 [2018-10-23 09:34:04,064 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:34:04,090 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-23 09:34:04,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:34:04,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:34:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:04,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:34:04,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-23 09:34:04,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 09:34:04,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 09:34:04,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-23 09:34:04,143 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 13 states. [2018-10-23 09:34:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:34:04,482 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-23 09:34:04,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-23 09:34:04,484 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2018-10-23 09:34:04,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:34:04,485 INFO L225 Difference]: With dead ends: 31 [2018-10-23 09:34:04,485 INFO L226 Difference]: Without dead ends: 27 [2018-10-23 09:34:04,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2018-10-23 09:34:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-23 09:34:04,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-10-23 09:34:04,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-23 09:34:04,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-23 09:34:04,491 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2018-10-23 09:34:04,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:34:04,491 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-23 09:34:04,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 09:34:04,492 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-23 09:34:04,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-23 09:34:04,493 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:34:04,493 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-23 09:34:04,493 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:34:04,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:34:04,493 INFO L82 PathProgramCache]: Analyzing trace with hash -601602355, now seen corresponding path program 6 times [2018-10-23 09:34:04,493 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:34:04,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:34:04,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:04,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:34:04,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:34:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:05,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:34:05,041 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 [2018-10-23 09:34:05,049 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:34:05,094 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-23 09:34:05,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:34:05,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:34:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:05,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:34:05,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-23 09:34:05,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-23 09:34:05,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-23 09:34:05,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-23 09:34:05,180 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 15 states. [2018-10-23 09:34:05,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:34:05,573 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-23 09:34:05,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-23 09:34:05,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-10-23 09:34:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:34:05,575 INFO L225 Difference]: With dead ends: 34 [2018-10-23 09:34:05,575 INFO L226 Difference]: Without dead ends: 30 [2018-10-23 09:34:05,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2018-10-23 09:34:05,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-23 09:34:05,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-23 09:34:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-23 09:34:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-23 09:34:05,581 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-10-23 09:34:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:34:05,582 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-23 09:34:05,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-23 09:34:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-23 09:34:05,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-23 09:34:05,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:34:05,583 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-23 09:34:05,583 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:34:05,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:34:05,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2085930261, now seen corresponding path program 7 times [2018-10-23 09:34:05,584 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:34:05,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:34:05,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:05,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:34:05,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:34:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:05,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:34:05,965 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 [2018-10-23 09:34:05,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:34:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:34:05,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:34:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:06,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:34:06,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-23 09:34:06,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-23 09:34:06,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-23 09:34:06,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-23 09:34:06,050 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 17 states. [2018-10-23 09:34:06,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:34:06,761 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-23 09:34:06,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-23 09:34:06,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2018-10-23 09:34:06,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:34:06,763 INFO L225 Difference]: With dead ends: 37 [2018-10-23 09:34:06,763 INFO L226 Difference]: Without dead ends: 33 [2018-10-23 09:34:06,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2018-10-23 09:34:06,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-23 09:34:06,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-10-23 09:34:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-23 09:34:06,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-23 09:34:06,770 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-10-23 09:34:06,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:34:06,770 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-23 09:34:06,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-23 09:34:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-23 09:34:06,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-23 09:34:06,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:34:06,772 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-23 09:34:06,772 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:34:06,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:34:06,772 INFO L82 PathProgramCache]: Analyzing trace with hash -715298291, now seen corresponding path program 8 times [2018-10-23 09:34:06,773 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:34:06,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:34:06,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:06,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:34:06,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:34:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:07,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:34:07,238 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-23 09:34:07,257 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:34:07,277 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:34:07,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:34:07,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:34:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:07,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:34:07,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-23 09:34:07,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-23 09:34:07,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-23 09:34:07,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-23 09:34:07,331 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 19 states. [2018-10-23 09:34:08,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:34:08,046 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-23 09:34:08,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-23 09:34:08,047 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2018-10-23 09:34:08,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:34:08,049 INFO L225 Difference]: With dead ends: 40 [2018-10-23 09:34:08,049 INFO L226 Difference]: Without dead ends: 36 [2018-10-23 09:34:08,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2018-10-23 09:34:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-23 09:34:08,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-23 09:34:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-23 09:34:08,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-23 09:34:08,055 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-10-23 09:34:08,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:34:08,056 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-23 09:34:08,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-23 09:34:08,056 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-23 09:34:08,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-23 09:34:08,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:34:08,057 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-23 09:34:08,057 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:34:08,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:34:08,058 INFO L82 PathProgramCache]: Analyzing trace with hash -472363093, now seen corresponding path program 9 times [2018-10-23 09:34:08,058 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:34:08,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:34:08,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:08,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:34:08,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:34:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:08,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:34:08,542 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-23 09:34:08,549 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:34:12,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-23 09:34:12,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:34:12,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:34:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:12,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:34:12,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-23 09:34:12,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-23 09:34:12,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-23 09:34:12,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-23 09:34:12,607 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 21 states. [2018-10-23 09:34:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:34:13,222 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-23 09:34:13,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-23 09:34:13,222 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2018-10-23 09:34:13,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:34:13,224 INFO L225 Difference]: With dead ends: 43 [2018-10-23 09:34:13,224 INFO L226 Difference]: Without dead ends: 39 [2018-10-23 09:34:13,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2018-10-23 09:34:13,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-23 09:34:13,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-10-23 09:34:13,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-23 09:34:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-23 09:34:13,231 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-10-23 09:34:13,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:34:13,231 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-23 09:34:13,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-23 09:34:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-23 09:34:13,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-23 09:34:13,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:34:13,233 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-23 09:34:13,233 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:34:13,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:34:13,233 INFO L82 PathProgramCache]: Analyzing trace with hash -209773235, now seen corresponding path program 10 times [2018-10-23 09:34:13,233 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:34:13,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:34:13,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:13,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:34:13,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:34:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:13,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:34:13,859 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 [2018-10-23 09:34:13,868 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:34:13,911 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:34:13,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:34:13,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:34:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:14,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:34:14,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-23 09:34:14,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-23 09:34:14,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-23 09:34:14,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-23 09:34:14,035 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 23 states. [2018-10-23 09:34:15,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:34:15,519 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-23 09:34:15,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-23 09:34:15,520 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 37 [2018-10-23 09:34:15,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:34:15,521 INFO L225 Difference]: With dead ends: 46 [2018-10-23 09:34:15,521 INFO L226 Difference]: Without dead ends: 42 [2018-10-23 09:34:15,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2018-10-23 09:34:15,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-23 09:34:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-23 09:34:15,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-23 09:34:15,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-23 09:34:15,528 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-10-23 09:34:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:34:15,529 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-23 09:34:15,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-23 09:34:15,529 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-23 09:34:15,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-23 09:34:15,530 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:34:15,530 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-23 09:34:15,531 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:34:15,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:34:15,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1469240427, now seen corresponding path program 11 times [2018-10-23 09:34:15,531 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:34:15,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:34:15,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:15,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:34:15,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:34:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:34:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:34:16,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:34:16,036 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-23 09:34:16,051 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:35:16,543 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-23 09:35:16,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:35:17,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:35:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:35:17,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:35:17,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-23 09:35:17,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-23 09:35:17,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-23 09:35:17,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-23 09:35:17,135 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 25 states. [2018-10-23 09:35:18,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:35:18,115 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-23 09:35:18,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-23 09:35:18,115 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 40 [2018-10-23 09:35:18,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:35:18,116 INFO L225 Difference]: With dead ends: 49 [2018-10-23 09:35:18,117 INFO L226 Difference]: Without dead ends: 45 [2018-10-23 09:35:18,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2018-10-23 09:35:18,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-23 09:35:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-23 09:35:18,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-23 09:35:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-23 09:35:18,123 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-10-23 09:35:18,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:35:18,123 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-23 09:35:18,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-23 09:35:18,123 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-23 09:35:18,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-23 09:35:18,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:35:18,124 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-23 09:35:18,125 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:35:18,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:35:18,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1776115853, now seen corresponding path program 12 times [2018-10-23 09:35:18,125 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:35:18,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:35:18,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:35:18,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:35:18,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:35:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:35:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:35:18,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:35:18,625 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 [2018-10-23 09:35:18,634 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:36:14,121 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-23 09:36:14,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:36:14,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:36:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:36:14,451 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:36:14,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-23 09:36:14,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-23 09:36:14,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-23 09:36:14,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-23 09:36:14,453 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 27 states. [2018-10-23 09:36:15,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:36:15,902 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-23 09:36:15,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-23 09:36:15,908 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 43 [2018-10-23 09:36:15,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:36:15,908 INFO L225 Difference]: With dead ends: 52 [2018-10-23 09:36:15,909 INFO L226 Difference]: Without dead ends: 48 [2018-10-23 09:36:15,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2018-10-23 09:36:15,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-23 09:36:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-10-23 09:36:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-23 09:36:15,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-23 09:36:15,925 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-10-23 09:36:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:36:15,925 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-23 09:36:15,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-23 09:36:15,926 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-23 09:36:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-23 09:36:15,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:36:15,926 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-23 09:36:15,927 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:36:15,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:36:15,927 INFO L82 PathProgramCache]: Analyzing trace with hash -83441365, now seen corresponding path program 13 times [2018-10-23 09:36:15,927 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:36:15,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:36:15,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:36:15,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:36:15,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:36:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:36:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:36:17,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:36:17,338 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 [2018-10-23 09:36:17,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:36:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:36:17,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:36:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:36:17,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:36:17,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-23 09:36:17,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-23 09:36:17,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-23 09:36:17,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-23 09:36:17,426 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 29 states. [2018-10-23 09:36:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:36:18,698 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-23 09:36:18,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-23 09:36:18,698 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 46 [2018-10-23 09:36:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:36:18,699 INFO L225 Difference]: With dead ends: 55 [2018-10-23 09:36:18,700 INFO L226 Difference]: Without dead ends: 51 [2018-10-23 09:36:18,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2018-10-23 09:36:18,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-23 09:36:18,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-10-23 09:36:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-23 09:36:18,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-23 09:36:18,708 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-10-23 09:36:18,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:36:18,708 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-23 09:36:18,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-23 09:36:18,709 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-23 09:36:18,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-23 09:36:18,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:36:18,710 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-23 09:36:18,710 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:36:18,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:36:18,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1664338995, now seen corresponding path program 14 times [2018-10-23 09:36:18,710 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:36:18,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:36:18,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:36:18,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:36:18,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:36:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:36:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:36:19,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:36:19,353 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 [2018-10-23 09:36:19,360 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:36:19,384 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:36:19,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:36:19,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:36:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:36:19,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:36:19,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-23 09:36:19,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-23 09:36:19,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-23 09:36:19,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-23 09:36:19,454 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 31 states. [2018-10-23 09:36:20,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:36:20,638 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-23 09:36:20,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-23 09:36:20,639 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 49 [2018-10-23 09:36:20,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:36:20,640 INFO L225 Difference]: With dead ends: 58 [2018-10-23 09:36:20,640 INFO L226 Difference]: Without dead ends: 54 [2018-10-23 09:36:20,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2018-10-23 09:36:20,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-23 09:36:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-10-23 09:36:20,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-23 09:36:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-23 09:36:20,647 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-10-23 09:36:20,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:36:20,648 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-23 09:36:20,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-23 09:36:20,648 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-23 09:36:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-23 09:36:20,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:36:20,649 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-23 09:36:20,649 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:36:20,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:36:20,650 INFO L82 PathProgramCache]: Analyzing trace with hash 425733611, now seen corresponding path program 15 times [2018-10-23 09:36:20,650 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:36:20,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:36:20,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:36:20,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:36:20,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:36:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:36:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:36:21,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:36:21,836 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 [2018-10-23 09:36:21,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:37:55,372 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-23 09:37:55,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:37:55,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:37:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:37:55,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:37:55,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-23 09:37:55,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-23 09:37:55,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-23 09:37:55,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-23 09:37:55,704 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 33 states. [2018-10-23 09:37:56,984 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-23 09:37:57,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:37:57,378 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-23 09:37:57,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-23 09:37:57,379 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 52 [2018-10-23 09:37:57,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:37:57,380 INFO L225 Difference]: With dead ends: 61 [2018-10-23 09:37:57,380 INFO L226 Difference]: Without dead ends: 57 [2018-10-23 09:37:57,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2018-10-23 09:37:57,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-23 09:37:57,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-10-23 09:37:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-23 09:37:57,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-23 09:37:57,389 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-10-23 09:37:57,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:37:57,389 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-23 09:37:57,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-23 09:37:57,390 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-23 09:37:57,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-23 09:37:57,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:37:57,391 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-23 09:37:57,391 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:37:57,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:37:57,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1637848845, now seen corresponding path program 16 times [2018-10-23 09:37:57,391 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:37:57,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:37:57,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:37:57,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:37:57,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:37:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:37:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:37:58,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:37:58,048 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 [2018-10-23 09:37:58,055 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:37:58,083 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:37:58,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:37:58,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:37:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:37:58,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:37:58,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-23 09:37:58,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-23 09:37:58,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-23 09:37:58,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-23 09:37:58,137 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 35 states. [2018-10-23 09:37:59,468 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-23 09:38:00,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:38:00,246 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-23 09:38:00,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-23 09:38:00,253 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 55 [2018-10-23 09:38:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:38:00,254 INFO L225 Difference]: With dead ends: 64 [2018-10-23 09:38:00,254 INFO L226 Difference]: Without dead ends: 60 [2018-10-23 09:38:00,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2018-10-23 09:38:00,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-23 09:38:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-10-23 09:38:00,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-23 09:38:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-23 09:38:00,261 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-10-23 09:38:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:38:00,261 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-23 09:38:00,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-23 09:38:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-23 09:38:00,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-23 09:38:00,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:38:00,262 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-23 09:38:00,262 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:38:00,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:38:00,263 INFO L82 PathProgramCache]: Analyzing trace with hash -322239829, now seen corresponding path program 17 times [2018-10-23 09:38:00,263 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:38:00,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:38:00,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:38:00,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:38:00,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:38:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:38:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:38:01,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:38:01,415 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 [2018-10-23 09:38:01,424 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown