java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/functions_true-unreach-call1_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-23 23:34:58,623 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 23:34:58,627 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 23:34:58,644 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 23:34:58,645 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 23:34:58,646 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 23:34:58,647 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 23:34:58,650 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 23:34:58,653 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 23:34:58,660 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 23:34:58,662 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 23:34:58,662 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 23:34:58,663 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 23:34:58,664 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 23:34:58,665 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 23:34:58,666 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 23:34:58,666 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 23:34:58,668 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 23:34:58,670 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 23:34:58,672 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 23:34:58,673 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 23:34:58,674 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 23:34:58,677 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-23 23:34:58,690 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-07-23 23:34:58,720 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 23:34:58,720 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 23:34:58,721 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-23 23:34:58,721 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-07-23 23:34:58,722 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-07-23 23:34:58,722 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-07-23 23:34:58,722 INFO L133 SettingsManager]: * Use SBE=true [2018-07-23 23:34:58,723 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-23 23:34:58,723 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-23 23:34:58,723 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-23 23:34:58,723 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-23 23:34:58,724 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-23 23:34:58,724 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-23 23:34:58,724 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-23 23:34:58,724 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-23 23:34:58,724 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 23:34:58,725 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-23 23:34:58,725 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-23 23:34:58,725 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-23 23:34:58,725 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-23 23:34:58,725 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 23:34:58,726 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-23 23:34:58,726 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-23 23:34:58,726 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-07-23 23:34:58,726 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-23 23:34:58,726 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-23 23:34:58,727 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 23:34:58,727 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-23 23:34:58,790 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 23:34:58,804 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 23:34:58,810 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 23:34:58,812 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-23 23:34:58,813 INFO L276 PluginConnector]: CDTParser initialized [2018-07-23 23:34:58,814 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/functions_true-unreach-call1_true-termination.i [2018-07-23 23:34:59,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b01e439/908d772a077149f5aa3453b86e445772/FLAG4a99dea38 [2018-07-23 23:34:59,360 INFO L276 CDTParser]: Found 1 translation units. [2018-07-23 23:34:59,360 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_true-unreach-call1_true-termination.i [2018-07-23 23:34:59,366 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b01e439/908d772a077149f5aa3453b86e445772/FLAG4a99dea38 [2018-07-23 23:34:59,380 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b01e439/908d772a077149f5aa3453b86e445772 [2018-07-23 23:34:59,393 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 23:34:59,394 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-23 23:34:59,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-23 23:34:59,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-23 23:34:59,402 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-23 23:34:59,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:34:59" (1/1) ... [2018-07-23 23:34:59,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68564c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:59, skipping insertion in model container [2018-07-23 23:34:59,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:34:59" (1/1) ... [2018-07-23 23:34:59,581 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-23 23:34:59,625 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:34:59,640 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-23 23:34:59,644 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:34:59,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:59 WrapperNode [2018-07-23 23:34:59,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-23 23:34:59,659 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-23 23:34:59,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-23 23:34:59,659 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-23 23:34:59,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:59" (1/1) ... [2018-07-23 23:34:59,676 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:59" (1/1) ... [2018-07-23 23:34:59,696 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-23 23:34:59,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 23:34:59,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 23:34:59,697 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 23:34:59,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:59" (1/1) ... [2018-07-23 23:34:59,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:59" (1/1) ... [2018-07-23 23:34:59,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:59" (1/1) ... [2018-07-23 23:34:59,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:59" (1/1) ... [2018-07-23 23:34:59,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:59" (1/1) ... [2018-07-23 23:34:59,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:59" (1/1) ... [2018-07-23 23:34:59,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:59" (1/1) ... [2018-07-23 23:34:59,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 23:34:59,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 23:34:59,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 23:34:59,733 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 23:34:59,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:34:59,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 23:34:59,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 23:35:00,225 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 23:35:00,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:35:00 BoogieIcfgContainer [2018-07-23 23:35:00,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 23:35:00,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 23:35:00,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 23:35:00,230 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 23:35:00,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 11:34:59" (1/3) ... [2018-07-23 23:35:00,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1c03db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:35:00, skipping insertion in model container [2018-07-23 23:35:00,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:34:59" (2/3) ... [2018-07-23 23:35:00,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1c03db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:35:00, skipping insertion in model container [2018-07-23 23:35:00,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:35:00" (3/3) ... [2018-07-23 23:35:00,234 INFO L112 eAbstractionObserver]: Analyzing ICFG functions_true-unreach-call1_true-termination.i [2018-07-23 23:35:00,244 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-23 23:35:00,251 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 23:35:00,295 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 23:35:00,296 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 23:35:00,296 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 23:35:00,296 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-23 23:35:00,296 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 23:35:00,296 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 23:35:00,297 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 23:35:00,297 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 23:35:00,297 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 23:35:00,311 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-07-23 23:35:00,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 23:35:00,317 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:00,318 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-07-23 23:35:00,318 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:00,323 INFO L82 PathProgramCache]: Analyzing trace with hash 889845351, now seen corresponding path program 1 times [2018-07-23 23:35:00,325 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:00,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:00,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:00,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:35:00,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:00,430 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:35:00,430 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 23:35:00,433 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-23 23:35:00,446 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-23 23:35:00,446 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-23 23:35:00,448 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-07-23 23:35:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:00,461 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-07-23 23:35:00,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-23 23:35:00,463 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-07-23 23:35:00,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:00,472 INFO L225 Difference]: With dead ends: 21 [2018-07-23 23:35:00,473 INFO L226 Difference]: Without dead ends: 9 [2018-07-23 23:35:00,476 INFO L573 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 [2018-07-23 23:35:00,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-23 23:35:00,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-07-23 23:35:00,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-23 23:35:00,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-07-23 23:35:00,513 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-07-23 23:35:00,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:00,513 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-07-23 23:35:00,513 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-23 23:35:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-07-23 23:35:00,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-23 23:35:00,514 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:00,514 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:00,515 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:00,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1805925645, now seen corresponding path program 1 times [2018-07-23 23:35:00,515 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:00,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:00,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:00,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:35:00,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:00,678 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:35:00,678 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 23:35:00,680 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 23:35:00,680 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 23:35:00,681 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:35:00,681 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2018-07-23 23:35:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:00,757 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-07-23 23:35:00,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 23:35:00,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-07-23 23:35:00,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:00,758 INFO L225 Difference]: With dead ends: 16 [2018-07-23 23:35:00,759 INFO L226 Difference]: Without dead ends: 12 [2018-07-23 23:35:00,760 INFO L573 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 [2018-07-23 23:35:00,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-23 23:35:00,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-07-23 23:35:00,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-23 23:35:00,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-07-23 23:35:00,763 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2018-07-23 23:35:00,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:00,764 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-07-23 23:35:00,764 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 23:35:00,764 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-07-23 23:35:00,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 23:35:00,765 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:00,765 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:00,765 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:00,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1078158165, now seen corresponding path program 1 times [2018-07-23 23:35:00,766 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:00,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:00,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:00,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:35:00,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:00,941 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:00,941 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:35:00,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:35:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:00,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:01,048 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:01,048 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-07-23 23:35:01,048 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 23:35:01,049 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 23:35:01,049 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-23 23:35:01,049 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 5 states. [2018-07-23 23:35:01,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:01,211 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-07-23 23:35:01,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 23:35:01,212 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-07-23 23:35:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:01,212 INFO L225 Difference]: With dead ends: 19 [2018-07-23 23:35:01,212 INFO L226 Difference]: Without dead ends: 15 [2018-07-23 23:35:01,213 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-07-23 23:35:01,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-23 23:35:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-07-23 23:35:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-23 23:35:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-07-23 23:35:01,217 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2018-07-23 23:35:01,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:01,218 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-07-23 23:35:01,218 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 23:35:01,218 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-07-23 23:35:01,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-23 23:35:01,219 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:01,219 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:01,219 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:01,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1814605, now seen corresponding path program 2 times [2018-07-23 23:35:01,219 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:01,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:01,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:01,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:35:01,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:01,699 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:01,699 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:35:01,709 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:35:01,741 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:35:01,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:35:01,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:01,780 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:01,780 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-07-23 23:35:01,781 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 23:35:01,781 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 23:35:01,781 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-07-23 23:35:01,782 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2018-07-23 23:35:02,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:02,088 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-07-23 23:35:02,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 23:35:02,088 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-07-23 23:35:02,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:02,089 INFO L225 Difference]: With dead ends: 22 [2018-07-23 23:35:02,089 INFO L226 Difference]: Without dead ends: 18 [2018-07-23 23:35:02,090 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-07-23 23:35:02,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-23 23:35:02,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-07-23 23:35:02,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-23 23:35:02,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-07-23 23:35:02,095 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2018-07-23 23:35:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:02,095 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-07-23 23:35:02,096 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 23:35:02,096 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-07-23 23:35:02,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-23 23:35:02,096 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:02,097 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:02,097 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:02,097 INFO L82 PathProgramCache]: Analyzing trace with hash -129408661, now seen corresponding path program 3 times [2018-07-23 23:35:02,097 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:02,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:02,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:02,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:35:02,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:02,333 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:02,333 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:35:02,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:35:02,372 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-23 23:35:02,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:35:02,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:02,431 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:02,432 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-07-23 23:35:02,432 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 23:35:02,433 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 23:35:02,433 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-07-23 23:35:02,433 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-07-23 23:35:02,741 WARN L169 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-23 23:35:03,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:03,020 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-07-23 23:35:03,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 23:35:03,020 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-07-23 23:35:03,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:03,021 INFO L225 Difference]: With dead ends: 25 [2018-07-23 23:35:03,021 INFO L226 Difference]: Without dead ends: 21 [2018-07-23 23:35:03,022 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2018-07-23 23:35:03,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-23 23:35:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-07-23 23:35:03,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-23 23:35:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-07-23 23:35:03,027 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-07-23 23:35:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:03,027 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-07-23 23:35:03,028 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 23:35:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-07-23 23:35:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-23 23:35:03,028 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:03,029 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:03,029 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:03,029 INFO L82 PathProgramCache]: Analyzing trace with hash -981486707, now seen corresponding path program 4 times [2018-07-23 23:35:03,029 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:03,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:03,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:03,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:35:03,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:03,301 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:03,301 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:35:03,318 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:35:03,338 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:35:03,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:35:03,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:03,398 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:03,398 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-07-23 23:35:03,399 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 23:35:03,399 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 23:35:03,399 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-07-23 23:35:03,400 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2018-07-23 23:35:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:03,825 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-07-23 23:35:03,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 23:35:03,826 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-07-23 23:35:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:03,827 INFO L225 Difference]: With dead ends: 28 [2018-07-23 23:35:03,828 INFO L226 Difference]: Without dead ends: 24 [2018-07-23 23:35:03,828 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2018-07-23 23:35:03,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-23 23:35:03,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-07-23 23:35:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-07-23 23:35:03,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-07-23 23:35:03,833 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2018-07-23 23:35:03,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:03,834 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-07-23 23:35:03,834 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 23:35:03,834 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-07-23 23:35:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-23 23:35:03,835 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:03,835 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:03,835 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:03,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1981835733, now seen corresponding path program 5 times [2018-07-23 23:35:03,835 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:03,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:03,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:03,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:35:03,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:04,142 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:04,142 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:35:04,158 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:35:04,217 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-07-23 23:35:04,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:35:04,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:04,262 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:04,262 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-07-23 23:35:04,263 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 23:35:04,263 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 23:35:04,263 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-07-23 23:35:04,264 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 13 states. [2018-07-23 23:35:04,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:04,617 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-07-23 23:35:04,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 23:35:04,619 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2018-07-23 23:35:04,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:04,620 INFO L225 Difference]: With dead ends: 31 [2018-07-23 23:35:04,620 INFO L226 Difference]: Without dead ends: 27 [2018-07-23 23:35:04,621 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2018-07-23 23:35:04,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-23 23:35:04,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-07-23 23:35:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-23 23:35:04,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-07-23 23:35:04,627 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2018-07-23 23:35:04,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:04,628 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-07-23 23:35:04,628 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 23:35:04,628 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-07-23 23:35:04,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-23 23:35:04,629 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:04,629 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:04,629 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:04,629 INFO L82 PathProgramCache]: Analyzing trace with hash -601602355, now seen corresponding path program 6 times [2018-07-23 23:35:04,629 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:04,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:04,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:04,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:35:04,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:05,098 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:05,098 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:35:05,106 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:35:05,130 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-07-23 23:35:05,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:35:05,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:05,177 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:05,177 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-07-23 23:35:05,178 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 23:35:05,178 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 23:35:05,178 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-07-23 23:35:05,179 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 15 states. [2018-07-23 23:35:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:05,573 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-07-23 23:35:05,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 23:35:05,574 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-07-23 23:35:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:05,575 INFO L225 Difference]: With dead ends: 34 [2018-07-23 23:35:05,575 INFO L226 Difference]: Without dead ends: 30 [2018-07-23 23:35:05,576 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2018-07-23 23:35:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-07-23 23:35:05,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-07-23 23:35:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-07-23 23:35:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-07-23 23:35:05,582 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-07-23 23:35:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:05,582 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-07-23 23:35:05,582 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 23:35:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-07-23 23:35:05,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-23 23:35:05,583 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:05,583 INFO L353 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:05,583 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:05,584 INFO L82 PathProgramCache]: Analyzing trace with hash -2085930261, now seen corresponding path program 7 times [2018-07-23 23:35:05,584 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:05,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:05,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:05,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:35:05,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:06,045 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:06,045 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:35:06,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:35:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:06,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:06,128 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:06,128 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-07-23 23:35:06,128 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 23:35:06,129 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 23:35:06,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-07-23 23:35:06,129 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 17 states. [2018-07-23 23:35:06,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:06,868 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-07-23 23:35:06,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 23:35:06,869 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2018-07-23 23:35:06,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:06,870 INFO L225 Difference]: With dead ends: 37 [2018-07-23 23:35:06,870 INFO L226 Difference]: Without dead ends: 33 [2018-07-23 23:35:06,871 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2018-07-23 23:35:06,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-07-23 23:35:06,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-07-23 23:35:06,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-23 23:35:06,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-07-23 23:35:06,877 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-07-23 23:35:06,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:06,878 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-07-23 23:35:06,878 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 23:35:06,878 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-07-23 23:35:06,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-23 23:35:06,879 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:06,879 INFO L353 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:06,879 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:06,880 INFO L82 PathProgramCache]: Analyzing trace with hash -715298291, now seen corresponding path program 8 times [2018-07-23 23:35:06,880 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:06,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:06,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:06,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:35:06,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:07,298 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:07,299 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:35:07,326 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:35:07,352 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:35:07,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:35:07,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:07,444 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:07,444 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-07-23 23:35:07,444 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 23:35:07,445 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 23:35:07,445 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-07-23 23:35:07,445 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 19 states. [2018-07-23 23:35:08,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:08,229 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-07-23 23:35:08,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 23:35:08,230 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2018-07-23 23:35:08,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:08,231 INFO L225 Difference]: With dead ends: 40 [2018-07-23 23:35:08,231 INFO L226 Difference]: Without dead ends: 36 [2018-07-23 23:35:08,233 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 23:35:08,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-23 23:35:08,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-07-23 23:35:08,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-23 23:35:08,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-07-23 23:35:08,239 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-07-23 23:35:08,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:08,240 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-07-23 23:35:08,240 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 23:35:08,240 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-07-23 23:35:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-23 23:35:08,241 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:08,241 INFO L353 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:08,241 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:08,241 INFO L82 PathProgramCache]: Analyzing trace with hash -472363093, now seen corresponding path program 9 times [2018-07-23 23:35:08,242 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:08,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:08,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:08,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:35:08,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:08,795 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:08,795 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:35:08,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:35:17,970 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-07-23 23:35:17,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:35:18,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:18,146 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:18,146 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-07-23 23:35:18,146 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 23:35:18,147 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 23:35:18,147 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-07-23 23:35:18,147 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 21 states. [2018-07-23 23:35:19,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:19,007 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-07-23 23:35:19,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 23:35:19,007 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2018-07-23 23:35:19,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:19,008 INFO L225 Difference]: With dead ends: 43 [2018-07-23 23:35:19,008 INFO L226 Difference]: Without dead ends: 39 [2018-07-23 23:35:19,010 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 23:35:19,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-23 23:35:19,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-07-23 23:35:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-07-23 23:35:19,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-07-23 23:35:19,016 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-07-23 23:35:19,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:19,016 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-07-23 23:35:19,016 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 23:35:19,016 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-07-23 23:35:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-07-23 23:35:19,017 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:19,017 INFO L353 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:19,017 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:19,018 INFO L82 PathProgramCache]: Analyzing trace with hash -209773235, now seen corresponding path program 10 times [2018-07-23 23:35:19,018 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:19,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:19,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:19,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:35:19,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:19,541 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:19,541 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:35:19,550 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:35:19,597 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:35:19,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:35:19,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:35:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:19,717 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:35:19,717 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-07-23 23:35:19,718 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 23:35:19,718 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 23:35:19,719 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-07-23 23:35:19,719 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 23 states. [2018-07-23 23:35:20,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:35:20,633 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-07-23 23:35:20,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 23:35:20,634 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 37 [2018-07-23 23:35:20,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:35:20,635 INFO L225 Difference]: With dead ends: 46 [2018-07-23 23:35:20,635 INFO L226 Difference]: Without dead ends: 42 [2018-07-23 23:35:20,637 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 23:35:20,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-23 23:35:20,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-07-23 23:35:20,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-07-23 23:35:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-07-23 23:35:20,643 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-07-23 23:35:20,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:35:20,644 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-07-23 23:35:20,644 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 23:35:20,644 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-07-23 23:35:20,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-23 23:35:20,645 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:35:20,645 INFO L353 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-07-23 23:35:20,645 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:35:20,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1469240427, now seen corresponding path program 11 times [2018-07-23 23:35:20,645 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:35:20,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:35:20,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:20,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:35:20,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:35:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:35:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:35:21,157 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:35:21,157 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:35:21,172 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:36:35,416 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-07-23 23:36:35,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:36:35,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:36:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (12)] Exception during sending of exit command (exit): Broken pipe [2018-07-23 23:36:35,639 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:36:35,639 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-07-23 23:36:35,639 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 23:36:35,639 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 23:36:35,640 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-07-23 23:36:35,640 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 25 states. [2018-07-23 23:36:36,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:36:36,780 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-07-23 23:36:36,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 23:36:36,780 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 40 [2018-07-23 23:36:36,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:36:36,781 INFO L225 Difference]: With dead ends: 49 [2018-07-23 23:36:36,782 INFO L226 Difference]: Without dead ends: 45 [2018-07-23 23:36:36,783 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 23:36:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-07-23 23:36:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-07-23 23:36:36,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-23 23:36:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-07-23 23:36:36,788 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-07-23 23:36:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:36:36,789 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-07-23 23:36:36,789 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 23:36:36,789 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-07-23 23:36:36,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-23 23:36:36,790 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:36:36,790 INFO L353 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-07-23 23:36:36,790 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:36:36,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1776115853, now seen corresponding path program 12 times [2018-07-23 23:36:36,791 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:36:36,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:36:36,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:36:36,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:36:36,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:36:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:36:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:36:37,420 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:36:37,420 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:36:37,432 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:36:37,535 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-07-23 23:36:37,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:36:37,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:36:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:36:37,626 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:36:37,626 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-07-23 23:36:37,627 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 23:36:37,627 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 23:36:37,627 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-07-23 23:36:37,628 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 27 states. [2018-07-23 23:36:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:36:39,142 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-07-23 23:36:39,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 23:36:39,149 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 43 [2018-07-23 23:36:39,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:36:39,149 INFO L225 Difference]: With dead ends: 52 [2018-07-23 23:36:39,150 INFO L226 Difference]: Without dead ends: 48 [2018-07-23 23:36:39,151 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 23:36:39,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-07-23 23:36:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-07-23 23:36:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-07-23 23:36:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-07-23 23:36:39,162 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-07-23 23:36:39,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:36:39,162 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-07-23 23:36:39,162 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 23:36:39,164 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-07-23 23:36:39,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-23 23:36:39,165 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:36:39,165 INFO L353 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-07-23 23:36:39,165 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:36:39,166 INFO L82 PathProgramCache]: Analyzing trace with hash -83441365, now seen corresponding path program 13 times [2018-07-23 23:36:39,166 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:36:39,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:36:39,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:36:39,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:36:39,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:36:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:36:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:36:40,405 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:36:40,405 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:36:40,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:36:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:36:40,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:36:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:36:40,489 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:36:40,489 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-07-23 23:36:40,489 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 23:36:40,490 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 23:36:40,490 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-07-23 23:36:40,490 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 29 states. [2018-07-23 23:36:41,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:36:41,712 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-07-23 23:36:41,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 23:36:41,713 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 46 [2018-07-23 23:36:41,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:36:41,714 INFO L225 Difference]: With dead ends: 55 [2018-07-23 23:36:41,714 INFO L226 Difference]: Without dead ends: 51 [2018-07-23 23:36:41,716 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 23:36:41,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-07-23 23:36:41,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-07-23 23:36:41,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-07-23 23:36:41,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-07-23 23:36:41,721 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-07-23 23:36:41,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:36:41,722 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-07-23 23:36:41,722 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 23:36:41,722 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-07-23 23:36:41,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-07-23 23:36:41,723 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:36:41,723 INFO L353 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-07-23 23:36:41,723 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:36:41,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1664338995, now seen corresponding path program 14 times [2018-07-23 23:36:41,723 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:36:41,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:36:41,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:36:41,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:36:41,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:36:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:36:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:36:42,648 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:36:42,648 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:36:42,656 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:36:42,694 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:36:42,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:36:42,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:36:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:36:42,749 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:36:42,749 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-07-23 23:36:42,749 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 23:36:42,750 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 23:36:42,750 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-07-23 23:36:42,750 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 31 states. [2018-07-23 23:36:44,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:36:44,106 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-07-23 23:36:44,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 23:36:44,107 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 49 [2018-07-23 23:36:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:36:44,108 INFO L225 Difference]: With dead ends: 58 [2018-07-23 23:36:44,108 INFO L226 Difference]: Without dead ends: 54 [2018-07-23 23:36:44,110 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 23:36:44,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-07-23 23:36:44,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-07-23 23:36:44,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-23 23:36:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-07-23 23:36:44,117 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-07-23 23:36:44,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:36:44,118 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-07-23 23:36:44,118 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 23:36:44,118 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-07-23 23:36:44,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-23 23:36:44,119 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:36:44,119 INFO L353 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-07-23 23:36:44,119 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:36:44,119 INFO L82 PathProgramCache]: Analyzing trace with hash 425733611, now seen corresponding path program 15 times [2018-07-23 23:36:44,119 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:36:44,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:36:44,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:36:44,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:36:44,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:36:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:36:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:36:45,027 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:36:45,027 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:36:45,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:37:21,680 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-07-23 23:37:21,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:37:21,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:37:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:37:21,748 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:37:21,748 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-07-23 23:37:21,748 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 23:37:21,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 23:37:21,749 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 23:37:21,749 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 33 states. [2018-07-23 23:37:23,442 WARN L169 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-23 23:37:23,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:37:23,722 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-07-23 23:37:23,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 23:37:23,723 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 52 [2018-07-23 23:37:23,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:37:23,724 INFO L225 Difference]: With dead ends: 61 [2018-07-23 23:37:23,724 INFO L226 Difference]: Without dead ends: 57 [2018-07-23 23:37:23,726 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 23:37:23,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-07-23 23:37:23,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-07-23 23:37:23,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-07-23 23:37:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-07-23 23:37:23,734 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-07-23 23:37:23,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:37:23,734 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-07-23 23:37:23,734 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 23:37:23,734 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-07-23 23:37:23,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-23 23:37:23,735 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:37:23,735 INFO L353 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-07-23 23:37:23,735 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:37:23,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1637848845, now seen corresponding path program 16 times [2018-07-23 23:37:23,736 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:37:23,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:37:23,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:37:23,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:37:23,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:37:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:37:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:37:25,579 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:37:25,579 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:37:25,586 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:37:25,616 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:37:25,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:37:25,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:37:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:37:25,665 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:37:25,665 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-07-23 23:37:25,666 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 23:37:25,666 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 23:37:25,666 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 23:37:25,666 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 35 states. [2018-07-23 23:37:26,853 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-23 23:37:27,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:37:27,804 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-07-23 23:37:27,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 23:37:27,804 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 55 [2018-07-23 23:37:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:37:27,805 INFO L225 Difference]: With dead ends: 64 [2018-07-23 23:37:27,805 INFO L226 Difference]: Without dead ends: 60 [2018-07-23 23:37:27,808 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 23:37:27,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-07-23 23:37:27,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-07-23 23:37:27,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-07-23 23:37:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-07-23 23:37:27,813 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-07-23 23:37:27,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:37:27,813 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-07-23 23:37:27,813 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 23:37:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-07-23 23:37:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-23 23:37:27,814 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:37:27,814 INFO L353 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-07-23 23:37:27,815 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:37:27,815 INFO L82 PathProgramCache]: Analyzing trace with hash -322239829, now seen corresponding path program 17 times [2018-07-23 23:37:27,815 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:37:27,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:37:27,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:37:27,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:37:27,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:37:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:37:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:37:29,003 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:37:29,003 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-07-23 23:37:29,010 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown