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/diamond_true-unreach-call1_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 11:53:18,039 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 11:53:18,042 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 11:53:18,058 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 11:53:18,058 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 11:53:18,060 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 11:53:18,064 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 11:53:18,066 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 11:53:18,069 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 11:53:18,069 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 11:53:18,072 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 11:53:18,073 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 11:53:18,074 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 11:53:18,076 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 11:53:18,078 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 11:53:18,081 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 11:53:18,082 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 11:53:18,084 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 11:53:18,093 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 11:53:18,097 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 11:53:18,099 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 11:53:18,100 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 11:53:18,103 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 11:53:18,113 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 11:53:18,129 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 11:53:18,129 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 11:53:18,130 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 11:53:18,130 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 11:53:18,131 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 11:53:18,131 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 11:53:18,131 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 11:53:18,132 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 11:53:18,132 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 11:53:18,132 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 11:53:18,132 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 11:53:18,133 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 11:53:18,133 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 11:53:18,133 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 11:53:18,133 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 11:53:18,133 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 11:53:18,134 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 11:53:18,134 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 11:53:18,134 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 11:53:18,134 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:53:18,134 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 11:53:18,135 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 11:53:18,135 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 11:53:18,135 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 11:53:18,135 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 11:53:18,135 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 11:53:18,136 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 11:53:18,136 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 11:53:18,181 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 11:53:18,201 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 11:53:18,205 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 11:53:18,207 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 11:53:18,207 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 11:53:18,209 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_true-unreach-call1_true-termination.i [2018-10-24 11:53:18,287 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/38116cc5e/3706c55b07ce46adb2946cd78c4a0b8a/FLAG63176ed77 [2018-10-24 11:53:18,688 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 11:53:18,689 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_true-unreach-call1_true-termination.i [2018-10-24 11:53:18,694 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/38116cc5e/3706c55b07ce46adb2946cd78c4a0b8a/FLAG63176ed77 [2018-10-24 11:53:18,709 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/38116cc5e/3706c55b07ce46adb2946cd78c4a0b8a [2018-10-24 11:53:18,719 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 11:53:18,721 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 11:53:18,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 11:53:18,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 11:53:18,726 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 11:53:18,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:53:18" (1/1) ... [2018-10-24 11:53:18,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bedfbfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:53:18, skipping insertion in model container [2018-10-24 11:53:18,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:53:18" (1/1) ... [2018-10-24 11:53:18,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 11:53:18,763 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 11:53:18,941 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:53:18,945 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 11:53:18,960 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:53:18,973 INFO L193 MainTranslator]: Completed translation [2018-10-24 11:53:18,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:53:18 WrapperNode [2018-10-24 11:53:18,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 11:53:18,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 11:53:18,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 11:53:18,975 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 11:53:18,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:53:18" (1/1) ... [2018-10-24 11:53:18,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:53:18" (1/1) ... [2018-10-24 11:53:19,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 11:53:19,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 11:53:19,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 11:53:19,019 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 11:53:19,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:53:18" (1/1) ... [2018-10-24 11:53:19,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:53:18" (1/1) ... [2018-10-24 11:53:19,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:53:18" (1/1) ... [2018-10-24 11:53:19,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:53:18" (1/1) ... [2018-10-24 11:53:19,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:53:18" (1/1) ... [2018-10-24 11:53:19,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:53:18" (1/1) ... [2018-10-24 11:53:19,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:53:18" (1/1) ... [2018-10-24 11:53:19,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 11:53:19,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 11:53:19,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 11:53:19,051 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 11:53:19,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:53:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:53:19,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 11:53:19,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 11:53:19,454 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 11:53:19,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:53:19 BoogieIcfgContainer [2018-10-24 11:53:19,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 11:53:19,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 11:53:19,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 11:53:19,464 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 11:53:19,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:53:18" (1/3) ... [2018-10-24 11:53:19,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70cb9e30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:53:19, skipping insertion in model container [2018-10-24 11:53:19,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:53:18" (2/3) ... [2018-10-24 11:53:19,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70cb9e30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:53:19, skipping insertion in model container [2018-10-24 11:53:19,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:53:19" (3/3) ... [2018-10-24 11:53:19,469 INFO L112 eAbstractionObserver]: Analyzing ICFG diamond_true-unreach-call1_true-termination.i [2018-10-24 11:53:19,480 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 11:53:19,488 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 11:53:19,507 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 11:53:19,548 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 11:53:19,549 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 11:53:19,549 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 11:53:19,549 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 11:53:19,550 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 11:53:19,550 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 11:53:19,550 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 11:53:19,550 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 11:53:19,550 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 11:53:19,567 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-10-24 11:53:19,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-24 11:53:19,574 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:19,575 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-24 11:53:19,577 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:19,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:19,584 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2018-10-24 11:53:19,586 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:19,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:19,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:19,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:53:19,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:19,704 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:53:19,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 11:53:19,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 11:53:19,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 11:53:19,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:53:19,732 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-10-24 11:53:19,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:19,759 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-24 11:53:19,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 11:53:19,762 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-24 11:53:19,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:19,784 INFO L225 Difference]: With dead ends: 21 [2018-10-24 11:53:19,784 INFO L226 Difference]: Without dead ends: 9 [2018-10-24 11:53:19,789 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 [2018-10-24 11:53:19,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-24 11:53:19,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-24 11:53:19,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-24 11:53:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-24 11:53:19,832 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-24 11:53:19,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:19,834 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-24 11:53:19,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 11:53:19,834 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-24 11:53:19,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-24 11:53:19,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:19,835 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:19,835 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:19,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:19,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1805929617, now seen corresponding path program 1 times [2018-10-24 11:53:19,836 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:19,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:19,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:19,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:53:19,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:19,985 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:53:19,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 11:53:19,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 11:53:19,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 11:53:19,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:53:19,988 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-10-24 11:53:20,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:20,101 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2018-10-24 11:53:20,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 11:53:20,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-24 11:53:20,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:20,105 INFO L225 Difference]: With dead ends: 16 [2018-10-24 11:53:20,105 INFO L226 Difference]: Without dead ends: 12 [2018-10-24 11:53:20,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:53:20,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-24 11:53:20,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-10-24 11:53:20,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-24 11:53:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-24 11:53:20,111 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2018-10-24 11:53:20,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:20,111 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-24 11:53:20,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 11:53:20,111 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-24 11:53:20,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-24 11:53:20,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:20,113 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:20,113 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:20,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:20,114 INFO L82 PathProgramCache]: Analyzing trace with hash -992266740, now seen corresponding path program 1 times [2018-10-24 11:53:20,114 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:20,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:20,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:20,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:53:20,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:20,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:20,287 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:53:20,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:53:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:20,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:20,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:20,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-24 11:53:20,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 11:53:20,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 11:53:20,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 11:53:20,433 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2018-10-24 11:53:20,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:20,505 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-10-24 11:53:20,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 11:53:20,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-24 11:53:20,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:20,506 INFO L225 Difference]: With dead ends: 19 [2018-10-24 11:53:20,506 INFO L226 Difference]: Without dead ends: 15 [2018-10-24 11:53:20,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 11:53:20,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-24 11:53:20,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-10-24 11:53:20,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-24 11:53:20,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-24 11:53:20,511 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-10-24 11:53:20,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:20,512 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-24 11:53:20,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 11:53:20,512 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-24 11:53:20,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-24 11:53:20,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:20,513 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:20,513 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:20,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:20,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1049525042, now seen corresponding path program 1 times [2018-10-24 11:53:20,514 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:20,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:20,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:20,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:53:20,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:20,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:20,664 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:53:20,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:53:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:20,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:20,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:20,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-24 11:53:20,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 11:53:20,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 11:53:20,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 11:53:20,753 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2018-10-24 11:53:20,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:20,970 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-24 11:53:20,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 11:53:20,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-24 11:53:20,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:20,972 INFO L225 Difference]: With dead ends: 21 [2018-10-24 11:53:20,972 INFO L226 Difference]: Without dead ends: 17 [2018-10-24 11:53:20,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 11:53:20,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-24 11:53:20,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-24 11:53:20,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-24 11:53:20,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-24 11:53:20,977 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-10-24 11:53:20,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:20,977 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-24 11:53:20,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 11:53:20,977 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-24 11:53:20,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-24 11:53:20,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:20,978 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:20,978 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:20,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:20,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1039690063, now seen corresponding path program 2 times [2018-10-24 11:53:20,979 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:20,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:20,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:20,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:53:20,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:21,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:21,159 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:53:21,167 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:53:21,180 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:53:21,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:21,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:21,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:21,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-24 11:53:21,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 11:53:21,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 11:53:21,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:53:21,224 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2018-10-24 11:53:21,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:21,329 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2018-10-24 11:53:21,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 11:53:21,330 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-24 11:53:21,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:21,332 INFO L225 Difference]: With dead ends: 24 [2018-10-24 11:53:21,332 INFO L226 Difference]: Without dead ends: 20 [2018-10-24 11:53:21,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:53:21,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-24 11:53:21,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2018-10-24 11:53:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-24 11:53:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2018-10-24 11:53:21,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2018-10-24 11:53:21,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:21,338 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2018-10-24 11:53:21,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 11:53:21,338 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2018-10-24 11:53:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-24 11:53:21,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:21,339 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:21,339 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:21,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:21,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1096948365, now seen corresponding path program 1 times [2018-10-24 11:53:21,340 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:21,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:21,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:21,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:21,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:21,472 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:53:21,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 11:53:21,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 11:53:21,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 11:53:21,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:53:21,477 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2018-10-24 11:53:21,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:21,562 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-10-24 11:53:21,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 11:53:21,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-10-24 11:53:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:21,564 INFO L225 Difference]: With dead ends: 33 [2018-10-24 11:53:21,565 INFO L226 Difference]: Without dead ends: 26 [2018-10-24 11:53:21,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:53:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-24 11:53:21,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2018-10-24 11:53:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-24 11:53:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2018-10-24 11:53:21,577 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2018-10-24 11:53:21,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:21,580 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2018-10-24 11:53:21,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 11:53:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2018-10-24 11:53:21,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-24 11:53:21,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:21,584 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:21,585 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:21,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:21,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1719748433, now seen corresponding path program 2 times [2018-10-24 11:53:21,586 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:21,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:21,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:21,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:53:21,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:21,690 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:53:21,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 11:53:21,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 11:53:21,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 11:53:21,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:53:21,691 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 3 states. [2018-10-24 11:53:21,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:21,713 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-10-24 11:53:21,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 11:53:21,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-10-24 11:53:21,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:21,715 INFO L225 Difference]: With dead ends: 33 [2018-10-24 11:53:21,716 INFO L226 Difference]: Without dead ends: 26 [2018-10-24 11:53:21,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:53:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-24 11:53:21,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2018-10-24 11:53:21,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-24 11:53:21,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-24 11:53:21,723 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2018-10-24 11:53:21,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:21,723 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-24 11:53:21,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 11:53:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-24 11:53:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-24 11:53:21,724 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:21,724 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:21,725 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:21,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:21,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1777006735, now seen corresponding path program 2 times [2018-10-24 11:53:21,725 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:21,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:21,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:21,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:21,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:21,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:21,907 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 [2018-10-24 11:53:21,920 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:53:21,943 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:53:21,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:21,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:21,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:21,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-24 11:53:21,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 11:53:21,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 11:53:21,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:53:21,998 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2018-10-24 11:53:22,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:22,090 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-10-24 11:53:22,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 11:53:22,091 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-24 11:53:22,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:22,091 INFO L225 Difference]: With dead ends: 30 [2018-10-24 11:53:22,092 INFO L226 Difference]: Without dead ends: 26 [2018-10-24 11:53:22,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:53:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-24 11:53:22,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-24 11:53:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-24 11:53:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-24 11:53:22,098 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2018-10-24 11:53:22,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:22,099 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-24 11:53:22,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 11:53:22,099 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-24 11:53:22,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-24 11:53:22,100 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:22,100 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:22,100 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:22,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:22,100 INFO L82 PathProgramCache]: Analyzing trace with hash -783665172, now seen corresponding path program 3 times [2018-10-24 11:53:22,101 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:22,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:22,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:22,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:22,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:22,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:22,317 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 [2018-10-24 11:53:22,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:53:46,374 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-24 11:53:46,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:46,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:46,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:46,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-24 11:53:46,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 11:53:46,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 11:53:46,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-24 11:53:46,479 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2018-10-24 11:53:46,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:46,871 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-10-24 11:53:46,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 11:53:46,872 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-10-24 11:53:46,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:46,873 INFO L225 Difference]: With dead ends: 33 [2018-10-24 11:53:46,873 INFO L226 Difference]: Without dead ends: 29 [2018-10-24 11:53:46,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-24 11:53:46,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-24 11:53:46,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2018-10-24 11:53:46,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-24 11:53:46,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-24 11:53:46,880 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2018-10-24 11:53:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:46,880 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-24 11:53:46,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 11:53:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-24 11:53:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-24 11:53:46,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:46,881 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:46,882 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:46,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:46,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1779147282, now seen corresponding path program 3 times [2018-10-24 11:53:46,882 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:46,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:46,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:46,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:46,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:47,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:47,193 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 [2018-10-24 11:53:47,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:53:47,211 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-24 11:53:47,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:47,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:47,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:47,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-24 11:53:47,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 11:53:47,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 11:53:47,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-24 11:53:47,249 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2018-10-24 11:53:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:47,354 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-10-24 11:53:47,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 11:53:47,355 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-10-24 11:53:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:47,356 INFO L225 Difference]: With dead ends: 36 [2018-10-24 11:53:47,356 INFO L226 Difference]: Without dead ends: 32 [2018-10-24 11:53:47,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-24 11:53:47,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-24 11:53:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-10-24 11:53:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-24 11:53:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-24 11:53:47,363 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 16 [2018-10-24 11:53:47,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:47,363 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-24 11:53:47,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 11:53:47,363 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-24 11:53:47,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-24 11:53:47,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:47,364 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:47,364 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:47,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:47,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1408055087, now seen corresponding path program 4 times [2018-10-24 11:53:47,365 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:47,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:47,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:47,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:47,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:47,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:47,609 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 [2018-10-24 11:53:47,623 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:53:47,632 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:53:47,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:47,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:47,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:47,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-24 11:53:47,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 11:53:47,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 11:53:47,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:53:47,682 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 7 states. [2018-10-24 11:53:47,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:47,826 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-10-24 11:53:47,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 11:53:47,827 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-10-24 11:53:47,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:47,828 INFO L225 Difference]: With dead ends: 39 [2018-10-24 11:53:47,829 INFO L226 Difference]: Without dead ends: 35 [2018-10-24 11:53:47,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:53:47,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-24 11:53:47,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-10-24 11:53:47,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-24 11:53:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-24 11:53:47,834 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 19 [2018-10-24 11:53:47,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:47,835 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-24 11:53:47,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 11:53:47,835 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-24 11:53:47,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-24 11:53:47,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:47,836 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:47,836 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:47,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:47,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1123673519, now seen corresponding path program 4 times [2018-10-24 11:53:47,837 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:47,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:47,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:47,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:47,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:48,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:48,186 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 [2018-10-24 11:53:48,194 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:53:48,205 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:53:48,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:48,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:48,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:48,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-24 11:53:48,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 11:53:48,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 11:53:48,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:53:48,242 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 7 states. [2018-10-24 11:53:48,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:48,366 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-10-24 11:53:48,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 11:53:48,367 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-10-24 11:53:48,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:48,368 INFO L225 Difference]: With dead ends: 42 [2018-10-24 11:53:48,368 INFO L226 Difference]: Without dead ends: 38 [2018-10-24 11:53:48,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:53:48,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-24 11:53:48,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-10-24 11:53:48,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-24 11:53:48,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-10-24 11:53:48,376 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 19 [2018-10-24 11:53:48,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:48,376 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-10-24 11:53:48,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 11:53:48,376 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-10-24 11:53:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-24 11:53:48,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:48,378 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:48,378 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:48,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:48,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1104653876, now seen corresponding path program 5 times [2018-10-24 11:53:48,380 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:48,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:48,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:48,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:48,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:48,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:48,870 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 [2018-10-24 11:53:48,881 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:53:48,934 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-24 11:53:48,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:48,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:48,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:48,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-24 11:53:48,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 11:53:48,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 11:53:48,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:53:48,973 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 8 states. [2018-10-24 11:53:49,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:49,141 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-10-24 11:53:49,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 11:53:49,144 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-10-24 11:53:49,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:49,144 INFO L225 Difference]: With dead ends: 45 [2018-10-24 11:53:49,144 INFO L226 Difference]: Without dead ends: 41 [2018-10-24 11:53:49,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:53:49,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-24 11:53:49,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-10-24 11:53:49,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-24 11:53:49,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-24 11:53:49,150 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 22 [2018-10-24 11:53:49,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:49,150 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-24 11:53:49,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 11:53:49,150 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-24 11:53:49,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-24 11:53:49,151 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:49,151 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:49,152 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:49,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:49,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1173872398, now seen corresponding path program 5 times [2018-10-24 11:53:49,152 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:49,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:49,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:49,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:49,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:49,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:49,487 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 [2018-10-24 11:53:49,497 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:53:49,524 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-24 11:53:49,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:49,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:49,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:49,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-24 11:53:49,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 11:53:49,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 11:53:49,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:53:49,571 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 8 states. [2018-10-24 11:53:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:49,815 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-10-24 11:53:49,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 11:53:49,815 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-10-24 11:53:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:49,816 INFO L225 Difference]: With dead ends: 48 [2018-10-24 11:53:49,816 INFO L226 Difference]: Without dead ends: 44 [2018-10-24 11:53:49,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:53:49,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-24 11:53:49,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2018-10-24 11:53:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-24 11:53:49,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-24 11:53:49,825 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 22 [2018-10-24 11:53:49,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:49,825 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-24 11:53:49,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 11:53:49,825 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-24 11:53:49,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-24 11:53:49,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:49,826 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:49,827 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:49,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:49,827 INFO L82 PathProgramCache]: Analyzing trace with hash 909632241, now seen corresponding path program 6 times [2018-10-24 11:53:49,827 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:49,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:49,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:49,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:49,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:50,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:50,025 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:53:50,039 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:53:50,072 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-24 11:53:50,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:50,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-24 11:53:52,626 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 11:53:52,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2018-10-24 11:53:52,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 11:53:52,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 11:53:52,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:53:52,628 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 14 states. [2018-10-24 11:53:53,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:53,226 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2018-10-24 11:53:53,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 11:53:53,226 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2018-10-24 11:53:53,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:53,227 INFO L225 Difference]: With dead ends: 55 [2018-10-24 11:53:53,228 INFO L226 Difference]: Without dead ends: 26 [2018-10-24 11:53:53,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:53:53,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-24 11:53:53,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-24 11:53:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-24 11:53:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-24 11:53:53,233 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 25 [2018-10-24 11:53:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:53,233 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-24 11:53:53,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 11:53:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-24 11:53:53,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-24 11:53:53,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:53,235 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:53,235 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:53,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:53,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1529510607, now seen corresponding path program 6 times [2018-10-24 11:53:53,236 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:53,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:53,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:53,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:53,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:53,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:53,550 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 [2018-10-24 11:53:53,557 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:53:53,574 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-24 11:53:53,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:53,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:53,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:53,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-24 11:53:53,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 11:53:53,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 11:53:53,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:53:53,610 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2018-10-24 11:53:54,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:54,075 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-24 11:53:54,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 11:53:54,076 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-10-24 11:53:54,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:54,077 INFO L225 Difference]: With dead ends: 34 [2018-10-24 11:53:54,077 INFO L226 Difference]: Without dead ends: 30 [2018-10-24 11:53:54,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:53:54,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-24 11:53:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-24 11:53:54,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-24 11:53:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-24 11:53:54,083 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-10-24 11:53:54,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:54,083 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-24 11:53:54,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 11:53:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-24 11:53:54,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-24 11:53:54,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:54,084 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:54,085 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:54,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:54,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1214122030, now seen corresponding path program 7 times [2018-10-24 11:53:54,085 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:54,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:54,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:54,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:54,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:54,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:54,483 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 [2018-10-24 11:53:54,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:53:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:54,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:54,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:54,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-24 11:53:54,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 11:53:54,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 11:53:54,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:53:54,606 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 10 states. [2018-10-24 11:53:54,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:54,775 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-24 11:53:54,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 11:53:54,776 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-10-24 11:53:54,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:54,777 INFO L225 Difference]: With dead ends: 37 [2018-10-24 11:53:54,777 INFO L226 Difference]: Without dead ends: 33 [2018-10-24 11:53:54,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:53:54,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-24 11:53:54,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-10-24 11:53:54,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-24 11:53:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-24 11:53:54,783 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-10-24 11:53:54,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:54,783 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-24 11:53:54,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 11:53:54,784 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-24 11:53:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-24 11:53:54,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:54,785 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:54,785 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:54,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:54,785 INFO L82 PathProgramCache]: Analyzing trace with hash -748599279, now seen corresponding path program 8 times [2018-10-24 11:53:54,786 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:54,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:54,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:54,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:53:54,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:55,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:55,012 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 [2018-10-24 11:53:55,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:53:55,045 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:53:55,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:55,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:55,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:55,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-24 11:53:55,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 11:53:55,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 11:53:55,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:53:55,096 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2018-10-24 11:53:55,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:55,283 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-24 11:53:55,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 11:53:55,284 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-10-24 11:53:55,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:55,285 INFO L225 Difference]: With dead ends: 40 [2018-10-24 11:53:55,285 INFO L226 Difference]: Without dead ends: 36 [2018-10-24 11:53:55,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:53:55,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-24 11:53:55,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-24 11:53:55,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-24 11:53:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-24 11:53:55,290 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-10-24 11:53:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:55,291 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-24 11:53:55,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 11:53:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-24 11:53:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-24 11:53:55,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:55,292 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:55,293 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:55,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:55,293 INFO L82 PathProgramCache]: Analyzing trace with hash -494347954, now seen corresponding path program 9 times [2018-10-24 11:53:55,293 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:55,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:55,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:55,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:55,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:55,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:55,578 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 [2018-10-24 11:53:55,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:53:55,628 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-24 11:53:55,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:55,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:55,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:55,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-24 11:53:55,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 11:53:55,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 11:53:55,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:53:55,705 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 12 states. [2018-10-24 11:53:55,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:55,945 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-24 11:53:55,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 11:53:55,951 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-10-24 11:53:55,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:55,952 INFO L225 Difference]: With dead ends: 43 [2018-10-24 11:53:55,952 INFO L226 Difference]: Without dead ends: 39 [2018-10-24 11:53:55,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:53:55,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-24 11:53:55,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-10-24 11:53:55,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-24 11:53:55,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-24 11:53:55,957 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-10-24 11:53:55,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:55,957 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-24 11:53:55,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 11:53:55,957 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-24 11:53:55,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-24 11:53:55,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:55,958 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:55,959 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:55,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:55,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1879532273, now seen corresponding path program 10 times [2018-10-24 11:53:55,959 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:55,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:55,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:55,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:55,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:56,255 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:56,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:56,257 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) [2018-10-24 11:53:56,269 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:53:56,286 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:53:56,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:56,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:56,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:56,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-24 11:53:56,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 11:53:56,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 11:53:56,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:53:56,344 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 13 states. [2018-10-24 11:53:56,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:56,737 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-24 11:53:56,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 11:53:56,737 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-10-24 11:53:56,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:56,737 INFO L225 Difference]: With dead ends: 46 [2018-10-24 11:53:56,738 INFO L226 Difference]: Without dead ends: 42 [2018-10-24 11:53:56,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:53:56,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-24 11:53:56,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-24 11:53:56,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-24 11:53:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-24 11:53:56,742 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-10-24 11:53:56,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:56,742 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-24 11:53:56,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 11:53:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-24 11:53:56,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-24 11:53:56,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:56,743 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:56,748 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:56,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:56,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1213878894, now seen corresponding path program 11 times [2018-10-24 11:53:56,748 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:56,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:56,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:56,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:56,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:57,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:57,678 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) [2018-10-24 11:53:57,693 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:53:59,192 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-24 11:53:59,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:59,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:59,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:59,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-24 11:53:59,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 11:53:59,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 11:53:59,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:53:59,253 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 14 states. [2018-10-24 11:53:59,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:59,565 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-24 11:53:59,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 11:53:59,566 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2018-10-24 11:53:59,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:59,566 INFO L225 Difference]: With dead ends: 49 [2018-10-24 11:53:59,566 INFO L226 Difference]: Without dead ends: 45 [2018-10-24 11:53:59,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:53:59,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-24 11:53:59,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-24 11:53:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-24 11:53:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-24 11:53:59,572 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-10-24 11:53:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:59,572 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-24 11:53:59,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 11:53:59,572 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-24 11:53:59,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-24 11:53:59,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:59,573 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:59,573 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:59,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:59,574 INFO L82 PathProgramCache]: Analyzing trace with hash 598070737, now seen corresponding path program 12 times [2018-10-24 11:53:59,574 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:59,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:59,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:59,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:59,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:54:00,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:54:00,018 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:54:00,027 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:54:00,118 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-24 11:54:00,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:54:00,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:54:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:54:00,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:54:00,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-24 11:54:00,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 11:54:00,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 11:54:00,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-24 11:54:00,181 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 15 states. [2018-10-24 11:54:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:54:00,498 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-24 11:54:00,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 11:54:00,501 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-10-24 11:54:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:54:00,502 INFO L225 Difference]: With dead ends: 52 [2018-10-24 11:54:00,502 INFO L226 Difference]: Without dead ends: 48 [2018-10-24 11:54:00,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-24 11:54:00,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-24 11:54:00,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-10-24 11:54:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-24 11:54:00,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-24 11:54:00,507 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-10-24 11:54:00,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:54:00,507 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-24 11:54:00,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 11:54:00,508 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-24 11:54:00,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-24 11:54:00,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:54:00,508 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-24 11:54:00,509 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:54:00,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:54:00,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1137413234, now seen corresponding path program 13 times [2018-10-24 11:54:00,509 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:54:00,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:54:00,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:00,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:54:00,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:54:01,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:54:01,055 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:54:01,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:54:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:01,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:54:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:54:01,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:54:01,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-24 11:54:01,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 11:54:01,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 11:54:01,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:54:01,141 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 16 states. [2018-10-24 11:54:01,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:54:01,467 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-24 11:54:01,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 11:54:01,468 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2018-10-24 11:54:01,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:54:01,468 INFO L225 Difference]: With dead ends: 55 [2018-10-24 11:54:01,468 INFO L226 Difference]: Without dead ends: 51 [2018-10-24 11:54:01,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:54:01,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-24 11:54:01,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-10-24 11:54:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-24 11:54:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-24 11:54:01,473 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-10-24 11:54:01,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:54:01,473 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-24 11:54:01,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 11:54:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-24 11:54:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-24 11:54:01,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:54:01,475 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-24 11:54:01,475 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:54:01,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:54:01,476 INFO L82 PathProgramCache]: Analyzing trace with hash -124084047, now seen corresponding path program 14 times [2018-10-24 11:54:01,476 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:54:01,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:54:01,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:01,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:54:01,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:54:02,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:54:02,466 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:54:02,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:54:02,505 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:54:02,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:54:02,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:54:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:54:02,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:54:02,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-24 11:54:02,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-24 11:54:02,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-24 11:54:02,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-24 11:54:02,583 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 17 states. [2018-10-24 11:54:03,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:54:03,455 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-24 11:54:03,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 11:54:03,456 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-10-24 11:54:03,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:54:03,457 INFO L225 Difference]: With dead ends: 58 [2018-10-24 11:54:03,457 INFO L226 Difference]: Without dead ends: 54 [2018-10-24 11:54:03,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-24 11:54:03,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-24 11:54:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-10-24 11:54:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-24 11:54:03,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-24 11:54:03,461 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-10-24 11:54:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:54:03,461 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-24 11:54:03,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-24 11:54:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-24 11:54:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-24 11:54:03,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:54:03,462 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-24 11:54:03,462 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:54:03,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:54:03,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1359397714, now seen corresponding path program 15 times [2018-10-24 11:54:03,463 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:54:03,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:54:03,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:03,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:54:03,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:54:03,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:54:03,745 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:54:03,753 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:54:05,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-24 11:54:05,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:54:05,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:54:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:54:05,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:54:05,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-24 11:54:05,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-24 11:54:05,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-24 11:54:05,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:54:05,433 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 18 states. [2018-10-24 11:54:06,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:54:06,034 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-24 11:54:06,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 11:54:06,035 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-24 11:54:06,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:54:06,035 INFO L225 Difference]: With dead ends: 61 [2018-10-24 11:54:06,036 INFO L226 Difference]: Without dead ends: 57 [2018-10-24 11:54:06,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:54:06,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-24 11:54:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-10-24 11:54:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-24 11:54:06,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-24 11:54:06,040 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-10-24 11:54:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:54:06,040 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-24 11:54:06,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-24 11:54:06,041 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-24 11:54:06,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-24 11:54:06,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:54:06,041 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-24 11:54:06,042 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:54:06,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:54:06,042 INFO L82 PathProgramCache]: Analyzing trace with hash 985908113, now seen corresponding path program 16 times [2018-10-24 11:54:06,042 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:54:06,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:54:06,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:06,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:54:06,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:54:06,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:54:06,466 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:54:06,473 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:54:06,492 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:54:06,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:54:06,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:54:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:54:06,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:54:06,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-24 11:54:06,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-24 11:54:06,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-24 11:54:06,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:54:06,530 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 19 states. [2018-10-24 11:54:06,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:54:06,959 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-24 11:54:06,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 11:54:06,959 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-10-24 11:54:06,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:54:06,960 INFO L225 Difference]: With dead ends: 64 [2018-10-24 11:54:06,960 INFO L226 Difference]: Without dead ends: 60 [2018-10-24 11:54:06,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:54:06,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-24 11:54:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-10-24 11:54:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-24 11:54:06,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-24 11:54:06,966 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-10-24 11:54:06,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:54:06,967 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-24 11:54:06,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-24 11:54:06,967 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-24 11:54:06,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-24 11:54:06,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:54:06,968 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-24 11:54:06,968 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:54:06,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:54:06,968 INFO L82 PathProgramCache]: Analyzing trace with hash -536171058, now seen corresponding path program 17 times [2018-10-24 11:54:06,969 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:54:06,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:54:06,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:06,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:54:06,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:54:07,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:54:07,404 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:54:07,411 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:55:01,275 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-24 11:55:01,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:55:01,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:55:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:01,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:55:01,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-24 11:55:01,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-24 11:55:01,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-24 11:55:01,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:55:01,448 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 20 states. [2018-10-24 11:55:02,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:55:02,117 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-24 11:55:02,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 11:55:02,118 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2018-10-24 11:55:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:55:02,119 INFO L225 Difference]: With dead ends: 67 [2018-10-24 11:55:02,119 INFO L226 Difference]: Without dead ends: 63 [2018-10-24 11:55:02,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:55:02,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-24 11:55:02,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-10-24 11:55:02,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-24 11:55:02,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-24 11:55:02,124 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2018-10-24 11:55:02,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:55:02,125 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-24 11:55:02,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-24 11:55:02,125 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-24 11:55:02,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-24 11:55:02,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:02,125 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:02,126 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:02,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:02,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1467956849, now seen corresponding path program 18 times [2018-10-24 11:55:02,126 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:02,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:02,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:02,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:55:02,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:02,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:55:02,592 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:55:02,599 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:55:04,653 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-24 11:55:04,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:55:04,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:55:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:04,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:55:04,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-24 11:55:04,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 11:55:04,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 11:55:04,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-24 11:55:04,713 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 21 states. [2018-10-24 11:55:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:55:05,307 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-24 11:55:05,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-24 11:55:05,307 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2018-10-24 11:55:05,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:55:05,308 INFO L225 Difference]: With dead ends: 70 [2018-10-24 11:55:05,308 INFO L226 Difference]: Without dead ends: 66 [2018-10-24 11:55:05,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-24 11:55:05,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-24 11:55:05,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-10-24 11:55:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-24 11:55:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-24 11:55:05,314 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2018-10-24 11:55:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:55:05,314 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-24 11:55:05,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-24 11:55:05,314 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-24 11:55:05,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-24 11:55:05,315 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:05,315 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:05,315 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:05,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:05,315 INFO L82 PathProgramCache]: Analyzing trace with hash 2102052590, now seen corresponding path program 19 times [2018-10-24 11:55:05,316 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:05,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:05,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:05,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:55:05,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:05,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:55:05,925 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:55:05,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:55:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:05,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:55:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:05,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:55:05,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-24 11:55:05,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-24 11:55:05,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-24 11:55:05,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:55:05,991 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 22 states. [2018-10-24 11:55:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:55:06,637 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-24 11:55:06,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-24 11:55:06,638 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2018-10-24 11:55:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:55:06,639 INFO L225 Difference]: With dead ends: 73 [2018-10-24 11:55:06,639 INFO L226 Difference]: Without dead ends: 69 [2018-10-24 11:55:06,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:55:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-24 11:55:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-10-24 11:55:06,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-24 11:55:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-24 11:55:06,644 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2018-10-24 11:55:06,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:55:06,645 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-24 11:55:06,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-24 11:55:06,645 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-24 11:55:06,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-24 11:55:06,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:06,646 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:06,646 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:06,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:06,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1112862383, now seen corresponding path program 20 times [2018-10-24 11:55:06,646 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:06,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:06,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:06,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:55:06,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:07,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:55:07,275 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:55:07,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:55:07,305 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:55:07,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:55:07,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:55:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:07,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:55:07,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-24 11:55:07,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-24 11:55:07,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-24 11:55:07,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-24 11:55:07,357 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 23 states. [2018-10-24 11:55:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:55:08,005 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-24 11:55:08,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-24 11:55:08,005 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2018-10-24 11:55:08,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:55:08,006 INFO L225 Difference]: With dead ends: 76 [2018-10-24 11:55:08,007 INFO L226 Difference]: Without dead ends: 72 [2018-10-24 11:55:08,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-24 11:55:08,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-24 11:55:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-10-24 11:55:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-24 11:55:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-24 11:55:08,012 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2018-10-24 11:55:08,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:55:08,013 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-24 11:55:08,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-24 11:55:08,013 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-24 11:55:08,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-24 11:55:08,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:08,014 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:08,014 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:08,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:08,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1125877774, now seen corresponding path program 21 times [2018-10-24 11:55:08,014 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:08,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:08,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:08,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:55:08,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:08,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:55:08,436 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:55:08,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:55:10,708 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-24 11:55:10,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:55:10,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:55:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:10,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:55:10,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-24 11:55:10,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-24 11:55:10,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-24 11:55:10,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:55:10,764 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 24 states. [2018-10-24 11:55:11,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:55:11,508 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-24 11:55:11,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-24 11:55:11,509 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2018-10-24 11:55:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:55:11,510 INFO L225 Difference]: With dead ends: 79 [2018-10-24 11:55:11,510 INFO L226 Difference]: Without dead ends: 75 [2018-10-24 11:55:11,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:55:11,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-24 11:55:11,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-10-24 11:55:11,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-24 11:55:11,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-24 11:55:11,517 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2018-10-24 11:55:11,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:55:11,517 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-24 11:55:11,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-24 11:55:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-24 11:55:11,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-24 11:55:11,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:11,518 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:11,519 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:11,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:11,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1113244623, now seen corresponding path program 22 times [2018-10-24 11:55:11,519 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:11,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:11,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:11,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:55:11,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:12,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:55:12,087 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:55:12,094 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:55:12,120 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:55:12,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:55:12,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:55:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:12,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:55:12,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-24 11:55:12,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 11:55:12,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 11:55:12,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:55:12,197 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 25 states. [2018-10-24 11:55:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:55:13,030 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-24 11:55:13,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-24 11:55:13,030 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-10-24 11:55:13,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:55:13,031 INFO L225 Difference]: With dead ends: 82 [2018-10-24 11:55:13,032 INFO L226 Difference]: Without dead ends: 78 [2018-10-24 11:55:13,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:55:13,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-24 11:55:13,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-10-24 11:55:13,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-24 11:55:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-24 11:55:13,037 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2018-10-24 11:55:13,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:55:13,038 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-24 11:55:13,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 11:55:13,038 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-24 11:55:13,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-24 11:55:13,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:13,038 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:13,039 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:13,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:13,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1671499474, now seen corresponding path program 23 times [2018-10-24 11:55:13,039 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:13,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:13,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:13,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:55:13,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:13,767 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:13,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:55:13,768 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:55:13,782 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:57:00,177 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-24 11:57:00,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:00,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:00,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:00,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-24 11:57:00,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-24 11:57:00,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-24 11:57:00,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:57:00,590 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 26 states. [2018-10-24 11:57:01,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:01,428 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-24 11:57:01,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-24 11:57:01,428 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 76 [2018-10-24 11:57:01,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:01,429 INFO L225 Difference]: With dead ends: 85 [2018-10-24 11:57:01,429 INFO L226 Difference]: Without dead ends: 81 [2018-10-24 11:57:01,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:57:01,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-24 11:57:01,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2018-10-24 11:57:01,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-24 11:57:01,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-24 11:57:01,434 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2018-10-24 11:57:01,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:01,435 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-24 11:57:01,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-24 11:57:01,435 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-24 11:57:01,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-24 11:57:01,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:01,435 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:01,436 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:01,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1766571793, now seen corresponding path program 24 times [2018-10-24 11:57:01,436 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:01,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:01,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:01,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:01,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:02,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:02,310 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:02,318 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:57:41,164 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-24 11:57:41,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:41,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:41,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:41,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-24 11:57:41,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-24 11:57:41,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-24 11:57:41,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-24 11:57:41,305 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 27 states. [2018-10-24 11:57:42,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:42,333 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-24 11:57:42,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-24 11:57:42,333 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2018-10-24 11:57:42,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:42,334 INFO L225 Difference]: With dead ends: 88 [2018-10-24 11:57:42,334 INFO L226 Difference]: Without dead ends: 84 [2018-10-24 11:57:42,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-24 11:57:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-24 11:57:42,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2018-10-24 11:57:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-24 11:57:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-24 11:57:42,339 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2018-10-24 11:57:42,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:42,340 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-24 11:57:42,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-24 11:57:42,340 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-24 11:57:42,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-24 11:57:42,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:42,340 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:42,341 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:42,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:42,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1032388018, now seen corresponding path program 25 times [2018-10-24 11:57:42,341 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:42,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:42,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:42,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:42,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:43,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:43,049 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:43,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:43,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:43,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:43,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-24 11:57:43,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-24 11:57:43,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-24 11:57:43,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:57:43,192 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 28 states. [2018-10-24 11:57:44,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:44,259 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-24 11:57:44,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-24 11:57:44,259 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 82 [2018-10-24 11:57:44,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:44,260 INFO L225 Difference]: With dead ends: 91 [2018-10-24 11:57:44,261 INFO L226 Difference]: Without dead ends: 87 [2018-10-24 11:57:44,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:57:44,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-24 11:57:44,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-10-24 11:57:44,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-24 11:57:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-24 11:57:44,265 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 82 [2018-10-24 11:57:44,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:44,266 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-24 11:57:44,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-24 11:57:44,266 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-24 11:57:44,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-24 11:57:44,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:44,266 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:44,267 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:44,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:44,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1945934321, now seen corresponding path program 26 times [2018-10-24 11:57:44,267 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:44,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:44,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:44,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:44,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:45,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:45,799 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:45,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:57:45,837 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:57:45,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:45,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:45,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:45,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-24 11:57:45,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-24 11:57:45,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-24 11:57:45,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-24 11:57:45,894 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 29 states. [2018-10-24 11:57:46,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:46,878 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-24 11:57:46,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-24 11:57:46,878 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2018-10-24 11:57:46,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:46,879 INFO L225 Difference]: With dead ends: 94 [2018-10-24 11:57:46,880 INFO L226 Difference]: Without dead ends: 90 [2018-10-24 11:57:46,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-24 11:57:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-24 11:57:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-10-24 11:57:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-24 11:57:46,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-24 11:57:46,884 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 85 [2018-10-24 11:57:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:46,885 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-24 11:57:46,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-24 11:57:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-24 11:57:46,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-24 11:57:46,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:46,886 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:46,886 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:46,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:46,886 INFO L82 PathProgramCache]: Analyzing trace with hash -582632594, now seen corresponding path program 27 times [2018-10-24 11:57:46,886 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:46,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:46,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:46,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:46,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:47,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:47,519 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:47,526 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown