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 0.1.23-8c3fbe1 [2018-10-22 15:44:16,482 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:44:16,485 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:44:16,497 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:44:16,497 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:44:16,499 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:44:16,500 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:44:16,502 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:44:16,503 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:44:16,504 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:44:16,505 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:44:16,506 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:44:16,507 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:44:16,508 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:44:16,509 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:44:16,510 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:44:16,511 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:44:16,513 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:44:16,515 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:44:16,516 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:44:16,518 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:44:16,521 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:44:16,527 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:44:16,544 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 [2018-10-22 15:44:16,575 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:44:16,576 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:44:16,577 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:44:16,577 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:44:16,578 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:44:16,578 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:44:16,578 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:44:16,578 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:44:16,578 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:44:16,579 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:44:16,579 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:44:16,579 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:44:16,579 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:44:16,579 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:44:16,579 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:44:16,583 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:44:16,584 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:44:16,584 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:44:16,584 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:44:16,584 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:44:16,584 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:44:16,585 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:44:16,585 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:44:16,585 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:44:16,585 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:44:16,585 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:44:16,586 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:44:16,586 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:44:16,650 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:44:16,668 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:44:16,673 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:44:16,674 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:44:16,675 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:44:16,676 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_true-unreach-call1_true-termination.i [2018-10-22 15:44:16,749 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/afda71a49/f1a4de1178aa4189a27e707d1fdebfc2/FLAG92951c9cb [2018-10-22 15:44:17,267 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:44:17,268 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_true-unreach-call1_true-termination.i [2018-10-22 15:44:17,273 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/afda71a49/f1a4de1178aa4189a27e707d1fdebfc2/FLAG92951c9cb [2018-10-22 15:44:17,288 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/afda71a49/f1a4de1178aa4189a27e707d1fdebfc2 [2018-10-22 15:44:17,298 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:44:17,299 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:44:17,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:44:17,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:44:17,305 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:44:17,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:44:17" (1/1) ... [2018-10-22 15:44:17,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b49186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:44:17, skipping insertion in model container [2018-10-22 15:44:17,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:44:17" (1/1) ... [2018-10-22 15:44:17,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:44:17,338 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:44:17,509 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:44:17,514 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:44:17,533 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:44:17,553 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:44:17,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:44:17 WrapperNode [2018-10-22 15:44:17,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:44:17,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:44:17,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:44:17,555 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:44:17,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:44:17" (1/1) ... [2018-10-22 15:44:17,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:44:17" (1/1) ... [2018-10-22 15:44:17,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:44:17,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:44:17,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:44:17,595 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:44:17,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:44:17" (1/1) ... [2018-10-22 15:44:17,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:44:17" (1/1) ... [2018-10-22 15:44:17,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:44:17" (1/1) ... [2018-10-22 15:44:17,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:44:17" (1/1) ... [2018-10-22 15:44:17,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:44:17" (1/1) ... [2018-10-22 15:44:17,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:44:17" (1/1) ... [2018-10-22 15:44:17,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:44:17" (1/1) ... [2018-10-22 15:44:17,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:44:17,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:44:17,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:44:17,618 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:44:17,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:44:17" (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 [2018-10-22 15:44:17,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:44:17,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:44:18,082 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:44:18,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:44:18 BoogieIcfgContainer [2018-10-22 15:44:18,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:44:18,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:44:18,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:44:18,087 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:44:18,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:44:17" (1/3) ... [2018-10-22 15:44:18,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1112df62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:44:18, skipping insertion in model container [2018-10-22 15:44:18,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:44:17" (2/3) ... [2018-10-22 15:44:18,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1112df62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:44:18, skipping insertion in model container [2018-10-22 15:44:18,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:44:18" (3/3) ... [2018-10-22 15:44:18,092 INFO L112 eAbstractionObserver]: Analyzing ICFG diamond_true-unreach-call1_true-termination.i [2018-10-22 15:44:18,102 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:44:18,110 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:44:18,129 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:44:18,163 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:44:18,164 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:44:18,164 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:44:18,164 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:44:18,165 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:44:18,165 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:44:18,165 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:44:18,165 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:44:18,165 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:44:18,178 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-10-22 15:44:18,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-22 15:44:18,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:18,185 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-22 15:44:18,188 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:18,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:18,194 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2018-10-22 15:44:18,196 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:18,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:18,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:18,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:44:18,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:18,301 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:44:18,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:44:18,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:44:18,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:44:18,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:44:18,321 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-10-22 15:44:18,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:18,337 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-22 15:44:18,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:44:18,339 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-22 15:44:18,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:18,348 INFO L225 Difference]: With dead ends: 21 [2018-10-22 15:44:18,348 INFO L226 Difference]: Without dead ends: 9 [2018-10-22 15:44:18,352 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 [2018-10-22 15:44:18,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-22 15:44:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-22 15:44:18,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-22 15:44:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-22 15:44:18,385 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-22 15:44:18,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:18,386 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-22 15:44:18,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:44:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-22 15:44:18,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-22 15:44:18,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:18,387 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:18,387 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:18,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:18,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1805929617, now seen corresponding path program 1 times [2018-10-22 15:44:18,388 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:18,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:18,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:18,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:44:18,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:18,567 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:44:18,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:44:18,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:44:18,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:44:18,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:44:18,575 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-10-22 15:44:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:18,661 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2018-10-22 15:44:18,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:44:18,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-22 15:44:18,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:18,665 INFO L225 Difference]: With dead ends: 16 [2018-10-22 15:44:18,665 INFO L226 Difference]: Without dead ends: 12 [2018-10-22 15:44:18,666 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 [2018-10-22 15:44:18,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-22 15:44:18,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-10-22 15:44:18,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-22 15:44:18,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-22 15:44:18,671 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2018-10-22 15:44:18,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:18,672 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-22 15:44:18,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:44:18,672 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-22 15:44:18,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:44:18,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:18,673 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:18,673 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:18,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:18,674 INFO L82 PathProgramCache]: Analyzing trace with hash -992266740, now seen corresponding path program 1 times [2018-10-22 15:44:18,674 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:18,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:18,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:18,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:44:18,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:18,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:18,802 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 [2018-10-22 15:44:18,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:44:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:18,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:18,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:18,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-22 15:44:18,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:44:18,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:44:18,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:44:18,907 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2018-10-22 15:44:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:18,984 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-10-22 15:44:18,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:44:18,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-22 15:44:18,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:18,986 INFO L225 Difference]: With dead ends: 19 [2018-10-22 15:44:18,986 INFO L226 Difference]: Without dead ends: 15 [2018-10-22 15:44:18,987 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 [2018-10-22 15:44:18,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-22 15:44:18,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-10-22 15:44:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 15:44:18,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-22 15:44:18,990 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-10-22 15:44:18,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:18,991 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-22 15:44:18,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:44:18,991 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-22 15:44:18,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:44:18,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:18,992 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:18,992 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:18,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:18,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1049525042, now seen corresponding path program 1 times [2018-10-22 15:44:18,993 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:18,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:18,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:18,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:44:18,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:19,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:19,132 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 [2018-10-22 15:44:19,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:44:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:19,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:19,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:19,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-22 15:44:19,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:44:19,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:44:19,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:44:19,209 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2018-10-22 15:44:19,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:19,282 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-22 15:44:19,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:44:19,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-22 15:44:19,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:19,283 INFO L225 Difference]: With dead ends: 21 [2018-10-22 15:44:19,283 INFO L226 Difference]: Without dead ends: 17 [2018-10-22 15:44:19,284 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 [2018-10-22 15:44:19,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-22 15:44:19,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-22 15:44:19,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 15:44:19,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-22 15:44:19,288 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-10-22 15:44:19,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:19,288 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-22 15:44:19,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:44:19,288 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-22 15:44:19,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 15:44:19,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:19,289 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:19,289 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:19,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:19,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1039690063, now seen corresponding path program 2 times [2018-10-22 15:44:19,290 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:19,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:19,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:19,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:44:19,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:19,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:19,450 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 [2018-10-22 15:44:19,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:44:19,488 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:44:19,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:19,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:19,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:19,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-22 15:44:19,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:44:19,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:44:19,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:44:19,578 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2018-10-22 15:44:19,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:19,922 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2018-10-22 15:44:19,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:44:19,923 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-22 15:44:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:19,924 INFO L225 Difference]: With dead ends: 24 [2018-10-22 15:44:19,924 INFO L226 Difference]: Without dead ends: 20 [2018-10-22 15:44:19,926 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 [2018-10-22 15:44:19,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-22 15:44:19,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2018-10-22 15:44:19,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-22 15:44:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2018-10-22 15:44:19,933 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2018-10-22 15:44:19,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:19,933 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2018-10-22 15:44:19,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:44:19,934 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2018-10-22 15:44:19,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 15:44:19,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:19,935 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:19,935 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:19,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:19,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1096948365, now seen corresponding path program 1 times [2018-10-22 15:44:19,935 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:19,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:19,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:19,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:19,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:20,066 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:44:20,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:44:20,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:44:20,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:44:20,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:44:20,068 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2018-10-22 15:44:20,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:20,160 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-10-22 15:44:20,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:44:20,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-10-22 15:44:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:20,163 INFO L225 Difference]: With dead ends: 33 [2018-10-22 15:44:20,163 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 15:44:20,163 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 [2018-10-22 15:44:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 15:44:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2018-10-22 15:44:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-22 15:44:20,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2018-10-22 15:44:20,174 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2018-10-22 15:44:20,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:20,174 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2018-10-22 15:44:20,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:44:20,176 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2018-10-22 15:44:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 15:44:20,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:20,177 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:20,177 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:20,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:20,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1719748433, now seen corresponding path program 2 times [2018-10-22 15:44:20,178 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:20,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:20,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:20,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:44:20,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:20,273 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:44:20,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:44:20,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:44:20,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:44:20,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:44:20,275 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 3 states. [2018-10-22 15:44:20,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:20,303 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-10-22 15:44:20,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:44:20,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-10-22 15:44:20,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:20,305 INFO L225 Difference]: With dead ends: 33 [2018-10-22 15:44:20,305 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 15:44:20,306 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 [2018-10-22 15:44:20,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 15:44:20,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2018-10-22 15:44:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-22 15:44:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-22 15:44:20,312 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2018-10-22 15:44:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:20,313 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-22 15:44:20,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:44:20,313 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-22 15:44:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 15:44:20,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:20,314 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:20,314 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:20,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:20,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1777006735, now seen corresponding path program 2 times [2018-10-22 15:44:20,315 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:20,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:20,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:20,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:20,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:20,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:20,464 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 [2018-10-22 15:44:20,477 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:44:20,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:44:20,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:20,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:20,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:20,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-22 15:44:20,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:44:20,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:44:20,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:44:20,542 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2018-10-22 15:44:20,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:20,645 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-10-22 15:44:20,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:44:20,645 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-22 15:44:20,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:20,646 INFO L225 Difference]: With dead ends: 30 [2018-10-22 15:44:20,646 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 15:44:20,647 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 [2018-10-22 15:44:20,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 15:44:20,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-22 15:44:20,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-22 15:44:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-22 15:44:20,653 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2018-10-22 15:44:20,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:20,653 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-22 15:44:20,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:44:20,653 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-22 15:44:20,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 15:44:20,654 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:20,654 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:20,654 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:20,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:20,655 INFO L82 PathProgramCache]: Analyzing trace with hash -783665172, now seen corresponding path program 3 times [2018-10-22 15:44:20,655 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:20,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:20,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:20,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:20,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:20,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:20,830 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 [2018-10-22 15:44:20,840 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:44:44,915 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:44:44,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:44,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:44,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:44,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-22 15:44:44,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:44:44,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:44:44,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:44:44,963 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2018-10-22 15:44:45,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:45,333 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-10-22 15:44:45,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:44:45,336 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-10-22 15:44:45,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:45,337 INFO L225 Difference]: With dead ends: 33 [2018-10-22 15:44:45,337 INFO L226 Difference]: Without dead ends: 29 [2018-10-22 15:44:45,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:44:45,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-22 15:44:45,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2018-10-22 15:44:45,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-22 15:44:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-22 15:44:45,349 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2018-10-22 15:44:45,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:45,350 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-22 15:44:45,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:44:45,355 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-22 15:44:45,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 15:44:45,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:45,356 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:45,356 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:45,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:45,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1779147282, now seen corresponding path program 3 times [2018-10-22 15:44:45,359 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:45,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:45,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:45,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:45,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:45,660 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:45,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:45,661 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 [2018-10-22 15:44:45,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:44:45,681 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:44:45,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:45,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:45,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:45,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-22 15:44:45,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:44:45,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:44:45,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:44:45,725 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2018-10-22 15:44:45,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:45,839 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-10-22 15:44:45,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:44:45,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-10-22 15:44:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:45,841 INFO L225 Difference]: With dead ends: 36 [2018-10-22 15:44:45,841 INFO L226 Difference]: Without dead ends: 32 [2018-10-22 15:44:45,842 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 [2018-10-22 15:44:45,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-22 15:44:45,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-10-22 15:44:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-22 15:44:45,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-22 15:44:45,848 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 16 [2018-10-22 15:44:45,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:45,848 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-22 15:44:45,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:44:45,849 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-22 15:44:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 15:44:45,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:45,850 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:45,850 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:45,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:45,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1408055087, now seen corresponding path program 4 times [2018-10-22 15:44:45,851 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:45,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:45,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:45,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:45,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:46,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:46,133 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 [2018-10-22 15:44:46,145 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:44:46,157 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:44:46,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:46,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:46,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:46,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-22 15:44:46,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:44:46,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:44:46,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:44:46,242 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 7 states. [2018-10-22 15:44:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:46,376 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-10-22 15:44:46,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:44:46,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-10-22 15:44:46,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:46,378 INFO L225 Difference]: With dead ends: 39 [2018-10-22 15:44:46,379 INFO L226 Difference]: Without dead ends: 35 [2018-10-22 15:44:46,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:44:46,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-22 15:44:46,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-10-22 15:44:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-22 15:44:46,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-22 15:44:46,385 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 19 [2018-10-22 15:44:46,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:46,386 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-22 15:44:46,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:44:46,386 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-22 15:44:46,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 15:44:46,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:46,387 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:46,387 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:46,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:46,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1123673519, now seen corresponding path program 4 times [2018-10-22 15:44:46,388 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:46,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:46,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:46,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:46,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:46,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:46,518 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 [2018-10-22 15:44:46,526 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:44:46,541 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:44:46,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:46,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:46,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:46,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-22 15:44:46,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:44:46,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:44:46,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:44:46,584 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 7 states. [2018-10-22 15:44:46,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:46,709 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-10-22 15:44:46,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:44:46,710 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-10-22 15:44:46,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:46,711 INFO L225 Difference]: With dead ends: 42 [2018-10-22 15:44:46,711 INFO L226 Difference]: Without dead ends: 38 [2018-10-22 15:44:46,712 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 [2018-10-22 15:44:46,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-22 15:44:46,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-10-22 15:44:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-22 15:44:46,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-10-22 15:44:46,718 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 19 [2018-10-22 15:44:46,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:46,718 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-10-22 15:44:46,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:44:46,719 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-10-22 15:44:46,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 15:44:46,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:46,720 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:46,720 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:46,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:46,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1104653876, now seen corresponding path program 5 times [2018-10-22 15:44:46,721 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:46,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:46,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:46,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:46,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:47,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:47,297 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 [2018-10-22 15:44:47,306 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:44:47,352 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 15:44:47,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:47,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:47,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:47,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-22 15:44:47,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:44:47,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:44:47,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:44:47,392 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 8 states. [2018-10-22 15:44:47,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:47,570 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-10-22 15:44:47,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:44:47,572 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-10-22 15:44:47,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:47,573 INFO L225 Difference]: With dead ends: 45 [2018-10-22 15:44:47,573 INFO L226 Difference]: Without dead ends: 41 [2018-10-22 15:44:47,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:44:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-22 15:44:47,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-10-22 15:44:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-22 15:44:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-22 15:44:47,581 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 22 [2018-10-22 15:44:47,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:47,581 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-22 15:44:47,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:44:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-22 15:44:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 15:44:47,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:47,582 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:47,583 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:47,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:47,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1173872398, now seen corresponding path program 5 times [2018-10-22 15:44:47,583 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:47,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:47,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:47,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:47,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:47,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:47,800 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 [2018-10-22 15:44:47,809 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:44:47,836 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 15:44:47,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:47,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:47,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:47,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-22 15:44:47,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:44:47,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:44:47,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:44:47,882 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 8 states. [2018-10-22 15:44:48,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:48,057 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-10-22 15:44:48,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:44:48,058 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-10-22 15:44:48,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:48,058 INFO L225 Difference]: With dead ends: 48 [2018-10-22 15:44:48,059 INFO L226 Difference]: Without dead ends: 44 [2018-10-22 15:44:48,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:44:48,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-22 15:44:48,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2018-10-22 15:44:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-22 15:44:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-22 15:44:48,067 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 22 [2018-10-22 15:44:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:48,068 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-22 15:44:48,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:44:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-22 15:44:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-22 15:44:48,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:48,069 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:48,069 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:48,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:48,070 INFO L82 PathProgramCache]: Analyzing trace with hash 909632241, now seen corresponding path program 6 times [2018-10-22 15:44:48,070 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:48,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:48,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:48,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:48,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:48,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:48,212 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 [2018-10-22 15:44:48,228 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:44:48,260 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-22 15:44:48,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:48,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-22 15:44:50,889 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:44:50,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2018-10-22 15:44:50,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:44:50,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:44:50,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:44:50,891 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 14 states. [2018-10-22 15:44:51,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:51,468 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2018-10-22 15:44:51,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:44:51,469 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2018-10-22 15:44:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:51,469 INFO L225 Difference]: With dead ends: 55 [2018-10-22 15:44:51,469 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 15:44:51,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:44:51,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 15:44:51,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-22 15:44:51,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-22 15:44:51,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-22 15:44:51,475 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 25 [2018-10-22 15:44:51,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:51,475 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-22 15:44:51,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:44:51,475 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-22 15:44:51,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-22 15:44:51,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:51,476 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:51,477 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:51,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:51,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1529510607, now seen corresponding path program 6 times [2018-10-22 15:44:51,477 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:51,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:51,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:51,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:51,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:51,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:51,635 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-22 15:44:51,642 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:44:51,660 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 15:44:51,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:51,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:51,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:51,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-22 15:44:51,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:44:51,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:44:51,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:44:51,693 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2018-10-22 15:44:52,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:52,086 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-22 15:44:52,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:44:52,087 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-10-22 15:44:52,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:52,088 INFO L225 Difference]: With dead ends: 34 [2018-10-22 15:44:52,088 INFO L226 Difference]: Without dead ends: 30 [2018-10-22 15:44:52,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:44:52,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-22 15:44:52,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-22 15:44:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-22 15:44:52,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-22 15:44:52,095 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-10-22 15:44:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:52,095 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-22 15:44:52,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:44:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-22 15:44:52,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-22 15:44:52,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:52,096 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:52,097 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:52,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:52,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1214122030, now seen corresponding path program 7 times [2018-10-22 15:44:52,097 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:52,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:52,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:52,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:52,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:52,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:52,457 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 [2018-10-22 15:44:52,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:44:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:52,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:52,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:52,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-22 15:44:52,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:44:52,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:44:52,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:44:52,592 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 10 states. [2018-10-22 15:44:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:52,858 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-22 15:44:52,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:44:52,859 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-10-22 15:44:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:52,860 INFO L225 Difference]: With dead ends: 37 [2018-10-22 15:44:52,860 INFO L226 Difference]: Without dead ends: 33 [2018-10-22 15:44:52,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:44:52,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-22 15:44:52,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-10-22 15:44:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-22 15:44:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-22 15:44:52,867 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-10-22 15:44:52,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:52,867 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-22 15:44:52,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:44:52,867 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-22 15:44:52,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-22 15:44:52,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:52,868 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:52,868 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:52,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:52,869 INFO L82 PathProgramCache]: Analyzing trace with hash -748599279, now seen corresponding path program 8 times [2018-10-22 15:44:52,869 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:52,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:52,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:52,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:44:52,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:53,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:53,041 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-22 15:44:53,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:44:53,069 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:44:53,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:53,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:53,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:53,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-22 15:44:53,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:44:53,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:44:53,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:44:53,117 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2018-10-22 15:44:53,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:53,300 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-22 15:44:53,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:44:53,300 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-10-22 15:44:53,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:53,302 INFO L225 Difference]: With dead ends: 40 [2018-10-22 15:44:53,302 INFO L226 Difference]: Without dead ends: 36 [2018-10-22 15:44:53,303 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 [2018-10-22 15:44:53,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-22 15:44:53,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-22 15:44:53,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-22 15:44:53,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-22 15:44:53,309 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-10-22 15:44:53,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:53,317 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-22 15:44:53,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:44:53,318 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-22 15:44:53,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-22 15:44:53,318 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:53,318 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:53,319 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:53,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:53,319 INFO L82 PathProgramCache]: Analyzing trace with hash -494347954, now seen corresponding path program 9 times [2018-10-22 15:44:53,319 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:53,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:53,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:53,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:53,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:53,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:53,673 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 [2018-10-22 15:44:53,681 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:44:53,723 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-22 15:44:53,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:53,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:53,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:53,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-22 15:44:53,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:44:53,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:44:53,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:44:53,792 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 12 states. [2018-10-22 15:44:54,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:54,135 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-22 15:44:54,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:44:54,142 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-10-22 15:44:54,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:54,143 INFO L225 Difference]: With dead ends: 43 [2018-10-22 15:44:54,143 INFO L226 Difference]: Without dead ends: 39 [2018-10-22 15:44:54,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:44:54,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-22 15:44:54,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-10-22 15:44:54,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-22 15:44:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-22 15:44:54,155 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-10-22 15:44:54,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:54,156 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-22 15:44:54,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:44:54,156 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-22 15:44:54,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-22 15:44:54,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:54,157 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:54,157 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:54,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:54,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1879532273, now seen corresponding path program 10 times [2018-10-22 15:44:54,158 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:54,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:54,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:54,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:54,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:54,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:54,593 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:44:54,600 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:44:54,615 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:44:54,615 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:54,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:54,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:54,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-22 15:44:54,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:44:54,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:44:54,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:44:54,679 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 13 states. [2018-10-22 15:44:55,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:55,138 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-22 15:44:55,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:44:55,139 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-10-22 15:44:55,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:55,140 INFO L225 Difference]: With dead ends: 46 [2018-10-22 15:44:55,140 INFO L226 Difference]: Without dead ends: 42 [2018-10-22 15:44:55,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:44:55,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-22 15:44:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-22 15:44:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-22 15:44:55,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-22 15:44:55,144 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-10-22 15:44:55,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:55,145 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-22 15:44:55,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:44:55,145 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-22 15:44:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-22 15:44:55,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:55,146 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:55,146 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:55,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:55,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1213878894, now seen corresponding path program 11 times [2018-10-22 15:44:55,147 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:55,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:55,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:55,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:55,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:55,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:55,518 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:44:55,533 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:44:57,020 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-22 15:44:57,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:57,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:57,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:57,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-22 15:44:57,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:44:57,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:44:57,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:44:57,081 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 14 states. [2018-10-22 15:44:57,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:57,426 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-22 15:44:57,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:44:57,426 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2018-10-22 15:44:57,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:57,427 INFO L225 Difference]: With dead ends: 49 [2018-10-22 15:44:57,427 INFO L226 Difference]: Without dead ends: 45 [2018-10-22 15:44:57,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:44:57,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-22 15:44:57,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-22 15:44:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-22 15:44:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-22 15:44:57,433 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-10-22 15:44:57,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:57,434 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-22 15:44:57,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:44:57,434 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-22 15:44:57,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-22 15:44:57,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:57,435 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:57,435 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:57,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:57,436 INFO L82 PathProgramCache]: Analyzing trace with hash 598070737, now seen corresponding path program 12 times [2018-10-22 15:44:57,436 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:57,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:57,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:57,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:57,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:57,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:57,776 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 [2018-10-22 15:44:57,783 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:44:57,984 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-22 15:44:57,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:57,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:58,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:58,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-22 15:44:58,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:44:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:44:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:44:58,046 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 15 states. [2018-10-22 15:44:58,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:58,352 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-22 15:44:58,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:44:58,356 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-10-22 15:44:58,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:58,357 INFO L225 Difference]: With dead ends: 52 [2018-10-22 15:44:58,357 INFO L226 Difference]: Without dead ends: 48 [2018-10-22 15:44:58,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:44:58,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-22 15:44:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-10-22 15:44:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-22 15:44:58,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-22 15:44:58,361 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-10-22 15:44:58,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:58,362 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-22 15:44:58,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:44:58,362 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-22 15:44:58,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-22 15:44:58,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:58,362 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:58,363 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:58,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:58,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1137413234, now seen corresponding path program 13 times [2018-10-22 15:44:58,363 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:58,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:58,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:58,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:58,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:59,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:59,519 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-22 15:44:59,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:44:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:59,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:59,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:59,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-22 15:44:59,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:44:59,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:44:59,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:44:59,598 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 16 states. [2018-10-22 15:44:59,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:59,950 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-22 15:44:59,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:44:59,951 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2018-10-22 15:44:59,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:59,952 INFO L225 Difference]: With dead ends: 55 [2018-10-22 15:44:59,952 INFO L226 Difference]: Without dead ends: 51 [2018-10-22 15:44:59,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:44:59,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-22 15:44:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-10-22 15:44:59,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-22 15:44:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-22 15:44:59,958 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-10-22 15:44:59,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:59,959 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-22 15:44:59,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:44:59,959 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-22 15:44:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-22 15:44:59,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:59,960 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:59,960 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:59,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:59,961 INFO L82 PathProgramCache]: Analyzing trace with hash -124084047, now seen corresponding path program 14 times [2018-10-22 15:44:59,961 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:59,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:59,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:59,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:44:59,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:00,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:00,223 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 [2018-10-22 15:45:00,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:45:00,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:45:00,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:45:00,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:00,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:00,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-22 15:45:00,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:45:00,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:45:00,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:45:00,302 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 17 states. [2018-10-22 15:45:01,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:01,185 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-22 15:45:01,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:45:01,186 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-10-22 15:45:01,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:01,187 INFO L225 Difference]: With dead ends: 58 [2018-10-22 15:45:01,187 INFO L226 Difference]: Without dead ends: 54 [2018-10-22 15:45:01,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:45:01,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-22 15:45:01,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-10-22 15:45:01,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-22 15:45:01,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-22 15:45:01,191 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-10-22 15:45:01,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:01,191 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-22 15:45:01,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:45:01,191 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-22 15:45:01,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-22 15:45:01,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:01,192 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:01,192 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:01,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:01,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1359397714, now seen corresponding path program 15 times [2018-10-22 15:45:01,193 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:01,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:01,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:01,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:45:01,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:01,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:01,790 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 [2018-10-22 15:45:01,797 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:45:03,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-22 15:45:03,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:45:03,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:03,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:03,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-22 15:45:03,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:45:03,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:45:03,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:45:03,309 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 18 states. [2018-10-22 15:45:03,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:03,929 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-22 15:45:03,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:45:03,930 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-22 15:45:03,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:03,931 INFO L225 Difference]: With dead ends: 61 [2018-10-22 15:45:03,931 INFO L226 Difference]: Without dead ends: 57 [2018-10-22 15:45:03,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:45:03,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-22 15:45:03,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-10-22 15:45:03,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-22 15:45:03,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-22 15:45:03,936 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-10-22 15:45:03,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:03,936 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-22 15:45:03,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:45:03,937 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-22 15:45:03,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-22 15:45:03,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:03,937 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:03,938 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:03,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:03,938 INFO L82 PathProgramCache]: Analyzing trace with hash 985908113, now seen corresponding path program 16 times [2018-10-22 15:45:03,938 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:03,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:03,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:03,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:45:03,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:04,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:04,420 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 [2018-10-22 15:45:04,426 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:45:04,445 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:45:04,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:45:04,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:04,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:04,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-22 15:45:04,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:45:04,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:45:04,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:45:04,491 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 19 states. [2018-10-22 15:45:04,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:04,937 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-22 15:45:04,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:45:04,938 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-10-22 15:45:04,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:04,939 INFO L225 Difference]: With dead ends: 64 [2018-10-22 15:45:04,939 INFO L226 Difference]: Without dead ends: 60 [2018-10-22 15:45:04,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:45:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-22 15:45:04,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-10-22 15:45:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-22 15:45:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-22 15:45:04,945 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-10-22 15:45:04,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:04,946 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-22 15:45:04,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:45:04,946 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-22 15:45:04,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-22 15:45:04,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:04,947 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:04,947 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:04,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:04,948 INFO L82 PathProgramCache]: Analyzing trace with hash -536171058, now seen corresponding path program 17 times [2018-10-22 15:45:04,948 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:04,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:04,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:04,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:45:04,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:05,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:05,414 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 [2018-10-22 15:45:05,421 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:45:43,251 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-22 15:45:43,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:45:43,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:43,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:43,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-22 15:45:43,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:45:43,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:45:43,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:45:43,314 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 20 states. [2018-10-22 15:45:43,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:43,812 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-22 15:45:43,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:45:43,813 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2018-10-22 15:45:43,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:43,814 INFO L225 Difference]: With dead ends: 67 [2018-10-22 15:45:43,814 INFO L226 Difference]: Without dead ends: 63 [2018-10-22 15:45:43,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:45:43,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-22 15:45:43,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-10-22 15:45:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-22 15:45:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-22 15:45:43,820 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2018-10-22 15:45:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:43,820 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-22 15:45:43,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:45:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-22 15:45:43,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-22 15:45:43,821 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:43,821 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:43,821 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:43,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:43,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1467956849, now seen corresponding path program 18 times [2018-10-22 15:45:43,822 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:43,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:43,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:43,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:45:43,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:45,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:45,304 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 [2018-10-22 15:45:45,312 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:45:47,347 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-22 15:45:47,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:45:47,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:47,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:47,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-22 15:45:47,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:45:47,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:45:47,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:45:47,414 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 21 states. [2018-10-22 15:45:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:48,007 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-22 15:45:48,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 15:45:48,007 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2018-10-22 15:45:48,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:48,008 INFO L225 Difference]: With dead ends: 70 [2018-10-22 15:45:48,009 INFO L226 Difference]: Without dead ends: 66 [2018-10-22 15:45:48,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:45:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-22 15:45:48,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-10-22 15:45:48,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-22 15:45:48,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-22 15:45:48,014 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2018-10-22 15:45:48,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:48,014 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-22 15:45:48,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:45:48,014 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-22 15:45:48,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-22 15:45:48,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:48,015 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:48,015 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:48,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:48,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2102052590, now seen corresponding path program 19 times [2018-10-22 15:45:48,016 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:48,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:48,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:48,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:45:48,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:49,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:49,556 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 [2018-10-22 15:45:49,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:45:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:49,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:49,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:49,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-22 15:45:49,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:45:49,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:45:49,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:45:49,624 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 22 states. [2018-10-22 15:45:50,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:50,277 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-22 15:45:50,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:45:50,278 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2018-10-22 15:45:50,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:50,279 INFO L225 Difference]: With dead ends: 73 [2018-10-22 15:45:50,279 INFO L226 Difference]: Without dead ends: 69 [2018-10-22 15:45:50,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:45:50,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-22 15:45:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-10-22 15:45:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-22 15:45:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-22 15:45:50,284 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2018-10-22 15:45:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:50,284 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-22 15:45:50,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:45:50,284 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-22 15:45:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-22 15:45:50,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:50,285 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:50,285 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:50,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:50,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1112862383, now seen corresponding path program 20 times [2018-10-22 15:45:50,286 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:50,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:50,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:50,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:45:50,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:50,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:50,765 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 [2018-10-22 15:45:50,773 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:45:50,796 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:45:50,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:45:50,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:50,864 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:50,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-22 15:45:50,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:45:50,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:45:50,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:45:50,866 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 23 states. [2018-10-22 15:45:51,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:51,507 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-22 15:45:51,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:45:51,507 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2018-10-22 15:45:51,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:51,508 INFO L225 Difference]: With dead ends: 76 [2018-10-22 15:45:51,509 INFO L226 Difference]: Without dead ends: 72 [2018-10-22 15:45:51,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:45:51,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-22 15:45:51,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-10-22 15:45:51,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-22 15:45:51,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-22 15:45:51,514 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2018-10-22 15:45:51,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:51,514 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-22 15:45:51,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:45:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-22 15:45:51,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-22 15:45:51,515 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:51,515 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:51,516 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:51,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:51,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1125877774, now seen corresponding path program 21 times [2018-10-22 15:45:51,516 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:51,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:51,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:51,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:45:51,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:51,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:51,956 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 [2018-10-22 15:45:51,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:45:54,259 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-22 15:45:54,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:45:54,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:54,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:54,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-22 15:45:54,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:45:54,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:45:54,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:45:54,342 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 24 states. [2018-10-22 15:45:55,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:55,106 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-22 15:45:55,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:45:55,106 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2018-10-22 15:45:55,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:55,107 INFO L225 Difference]: With dead ends: 79 [2018-10-22 15:45:55,107 INFO L226 Difference]: Without dead ends: 75 [2018-10-22 15:45:55,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:45:55,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-22 15:45:55,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-10-22 15:45:55,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-22 15:45:55,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-22 15:45:55,113 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2018-10-22 15:45:55,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:55,114 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-22 15:45:55,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:45:55,114 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-22 15:45:55,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-22 15:45:55,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:55,115 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:55,115 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:55,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:55,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1113244623, now seen corresponding path program 22 times [2018-10-22 15:45:55,115 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:55,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:55,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:55,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:45:55,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:56,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:56,183 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 [2018-10-22 15:45:56,192 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:45:56,216 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:45:56,216 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:45:56,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:56,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:56,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-22 15:45:56,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:45:56,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:45:56,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:45:56,269 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 25 states. [2018-10-22 15:45:57,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:57,121 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-22 15:45:57,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-22 15:45:57,122 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-10-22 15:45:57,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:57,123 INFO L225 Difference]: With dead ends: 82 [2018-10-22 15:45:57,123 INFO L226 Difference]: Without dead ends: 78 [2018-10-22 15:45:57,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:45:57,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-22 15:45:57,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-10-22 15:45:57,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-22 15:45:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-22 15:45:57,128 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2018-10-22 15:45:57,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:57,129 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-22 15:45:57,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:45:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-22 15:45:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-22 15:45:57,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:57,130 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:57,130 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:57,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:57,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1671499474, now seen corresponding path program 23 times [2018-10-22 15:45:57,130 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:57,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:57,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:57,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:45:57,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:45:58,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:58,340 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-22 15:45:58,354 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:47:43,804 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-22 15:47:43,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:43,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:43,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:43,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-22 15:47:43,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:47:43,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:47:43,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:47:43,976 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 26 states. [2018-10-22 15:47:44,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:44,780 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-22 15:47:44,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:47:44,780 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 76 [2018-10-22 15:47:44,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:44,781 INFO L225 Difference]: With dead ends: 85 [2018-10-22 15:47:44,782 INFO L226 Difference]: Without dead ends: 81 [2018-10-22 15:47:44,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:47:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-22 15:47:44,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2018-10-22 15:47:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-22 15:47:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-22 15:47:44,786 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2018-10-22 15:47:44,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:44,786 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-22 15:47:44,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:47:44,787 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-22 15:47:44,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-22 15:47:44,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:44,787 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:44,787 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:44,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:44,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1766571793, now seen corresponding path program 24 times [2018-10-22 15:47:44,788 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:44,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:44,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:44,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:44,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:47:45,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:45,318 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 [2018-10-22 15:47:45,325 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:48:30,504 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-22 15:48:30,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:30,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:30,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:30,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-22 15:48:30,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:48:30,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:48:30,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:48:30,735 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 27 states. [2018-10-22 15:48:31,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:31,754 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-22 15:48:31,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 15:48:31,755 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2018-10-22 15:48:31,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:31,756 INFO L225 Difference]: With dead ends: 88 [2018-10-22 15:48:31,756 INFO L226 Difference]: Without dead ends: 84 [2018-10-22 15:48:31,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 11 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:48:31,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-22 15:48:31,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2018-10-22 15:48:31,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-22 15:48:31,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-22 15:48:31,761 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2018-10-22 15:48:31,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:31,762 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-22 15:48:31,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:48:31,762 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-22 15:48:31,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-22 15:48:31,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:31,763 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:31,763 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:31,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:31,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1032388018, now seen corresponding path program 25 times [2018-10-22 15:48:31,763 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:31,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:31,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:31,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:31,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:32,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:32,464 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 [2018-10-22 15:48:32,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:32,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:32,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:32,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-22 15:48:32,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:48:32,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:48:32,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:48:32,554 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 28 states. [2018-10-22 15:48:33,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:33,488 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-22 15:48:33,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:48:33,489 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 82 [2018-10-22 15:48:33,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:33,490 INFO L225 Difference]: With dead ends: 91 [2018-10-22 15:48:33,490 INFO L226 Difference]: Without dead ends: 87 [2018-10-22 15:48:33,490 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 [2018-10-22 15:48:33,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-22 15:48:33,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-10-22 15:48:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-22 15:48:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-22 15:48:33,495 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 82 [2018-10-22 15:48:33,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:33,495 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-22 15:48:33,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:48:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-22 15:48:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-22 15:48:33,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:33,495 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:33,496 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:33,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:33,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1945934321, now seen corresponding path program 26 times [2018-10-22 15:48:33,496 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:33,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:33,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:33,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:33,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:34,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:34,667 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 [2018-10-22 15:48:34,675 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:48:34,700 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:48:34,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:34,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:34,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:34,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-22 15:48:34,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:48:34,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:48:34,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:48:34,747 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 29 states. [2018-10-22 15:48:35,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:35,754 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-22 15:48:35,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:48:35,755 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2018-10-22 15:48:35,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:35,756 INFO L225 Difference]: With dead ends: 94 [2018-10-22 15:48:35,756 INFO L226 Difference]: Without dead ends: 90 [2018-10-22 15:48:35,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:48:35,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-22 15:48:35,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-10-22 15:48:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-22 15:48:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-22 15:48:35,761 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 85 [2018-10-22 15:48:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:35,761 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-22 15:48:35,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:48:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-22 15:48:35,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-22 15:48:35,762 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:35,762 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:35,762 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:35,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:35,763 INFO L82 PathProgramCache]: Analyzing trace with hash -582632594, now seen corresponding path program 27 times [2018-10-22 15:48:35,763 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:35,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:35,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:35,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:35,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:36,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:36,485 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 [2018-10-22 15:48:36,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown