java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested3_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 22:57:12,508 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:57:12,511 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:57:12,531 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:57:12,531 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:57:12,532 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:57:12,534 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:57:12,537 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:57:12,539 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:57:12,546 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:57:12,550 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:57:12,550 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:57:12,551 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:57:12,556 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:57:12,560 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:57:12,561 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:57:12,562 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:57:12,565 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:57:12,570 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:57:12,572 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:57:12,573 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:57:12,576 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:57:12,581 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-06 22:57:12,582 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-06 22:57:12,582 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-06 22:57:12,586 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-06 22:57:12,587 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-06 22:57:12,591 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-06 22:57:12,592 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-06 22:57:12,595 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-06 22:57:12,595 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-06 22:57:12,597 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-06 22:57:12,600 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 [2018-11-06 22:57:12,623 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:57:12,623 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:57:12,624 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:57:12,624 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:57:12,628 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:57:12,628 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:57:12,629 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:57:12,630 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:57:12,630 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:57:12,630 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:57:12,630 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:57:12,631 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:57:12,631 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:57:12,631 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:57:12,631 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:57:12,631 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:57:12,632 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:57:12,632 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:57:12,632 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:57:12,632 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:57:12,632 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:57:12,633 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:57:12,633 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:57:12,633 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:57:12,633 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:57:12,633 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:57:12,635 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:57:12,635 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:57:12,698 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:57:12,716 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:57:12,720 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:57:12,722 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:57:12,722 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:57:12,723 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3_false-unreach-call.c [2018-11-06 22:57:12,791 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee3a7883b/15151ceaed644f61800484b4b833c2a6/FLAGe11a10521 [2018-11-06 22:57:13,265 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:57:13,266 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3_false-unreach-call.c [2018-11-06 22:57:13,272 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee3a7883b/15151ceaed644f61800484b4b833c2a6/FLAGe11a10521 [2018-11-06 22:57:13,287 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee3a7883b/15151ceaed644f61800484b4b833c2a6 [2018-11-06 22:57:13,298 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:57:13,300 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:57:13,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:57:13,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:57:13,306 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:57:13,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:13" (1/1) ... [2018-11-06 22:57:13,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57535a62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:13, skipping insertion in model container [2018-11-06 22:57:13,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:13" (1/1) ... [2018-11-06 22:57:13,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:57:13,352 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:57:13,551 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:57:13,555 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:57:13,573 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:57:13,586 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:57:13,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:13 WrapperNode [2018-11-06 22:57:13,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:57:13,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:57:13,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:57:13,588 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:57:13,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:13" (1/1) ... [2018-11-06 22:57:13,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:13" (1/1) ... [2018-11-06 22:57:13,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:57:13,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:57:13,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:57:13,625 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:57:13,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:13" (1/1) ... [2018-11-06 22:57:13,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:13" (1/1) ... [2018-11-06 22:57:13,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:13" (1/1) ... [2018-11-06 22:57:13,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:13" (1/1) ... [2018-11-06 22:57:13,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:13" (1/1) ... [2018-11-06 22:57:13,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:13" (1/1) ... [2018-11-06 22:57:13,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:13" (1/1) ... [2018-11-06 22:57:13,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:57:13,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:57:13,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:57:13,651 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:57:13,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:13" (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 [2018-11-06 22:57:13,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:57:13,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:57:13,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-06 22:57:13,798 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-06 22:57:14,070 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:57:14,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:14 BoogieIcfgContainer [2018-11-06 22:57:14,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:57:14,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:57:14,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:57:14,076 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:57:14,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:57:13" (1/3) ... [2018-11-06 22:57:14,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669d1697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:14, skipping insertion in model container [2018-11-06 22:57:14,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:13" (2/3) ... [2018-11-06 22:57:14,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669d1697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:14, skipping insertion in model container [2018-11-06 22:57:14,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:14" (3/3) ... [2018-11-06 22:57:14,080 INFO L112 eAbstractionObserver]: Analyzing ICFG nested3_false-unreach-call.c [2018-11-06 22:57:14,090 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:57:14,099 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:57:14,117 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:57:14,152 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:57:14,153 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:57:14,153 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:57:14,153 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:57:14,153 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:57:14,154 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:57:14,154 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:57:14,154 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:57:14,154 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:57:14,172 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-11-06 22:57:14,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-11-06 22:57:14,177 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:14,178 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:14,181 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:14,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:14,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1842689724, now seen corresponding path program 1 times [2018-11-06 22:57:14,188 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:14,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:14,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:14,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:57:14,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:14,292 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:57:14,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 22:57:14,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-06 22:57:14,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-06 22:57:14,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:57:14,316 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-11-06 22:57:14,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:14,342 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2018-11-06 22:57:14,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 22:57:14,343 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2018-11-06 22:57:14,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:14,357 INFO L225 Difference]: With dead ends: 42 [2018-11-06 22:57:14,358 INFO L226 Difference]: Without dead ends: 19 [2018-11-06 22:57:14,363 INFO L604 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 [2018-11-06 22:57:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-06 22:57:14,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-06 22:57:14,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-06 22:57:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2018-11-06 22:57:14,406 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 7 [2018-11-06 22:57:14,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:14,407 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2018-11-06 22:57:14,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-06 22:57:14,407 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2018-11-06 22:57:14,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-06 22:57:14,408 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:14,408 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:14,408 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:14,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:14,409 INFO L82 PathProgramCache]: Analyzing trace with hash 150549178, now seen corresponding path program 1 times [2018-11-06 22:57:14,409 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:14,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:14,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:14,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:57:14,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:14,556 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:57:14,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:57:14,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:57:14,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:57:14,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:57:14,564 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 3 states. [2018-11-06 22:57:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:14,648 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-06 22:57:14,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:57:14,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-11-06 22:57:14,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:14,650 INFO L225 Difference]: With dead ends: 36 [2018-11-06 22:57:14,651 INFO L226 Difference]: Without dead ends: 29 [2018-11-06 22:57:14,652 INFO L604 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 [2018-11-06 22:57:14,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-06 22:57:14,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2018-11-06 22:57:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-06 22:57:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-06 22:57:14,661 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2018-11-06 22:57:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:14,663 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-06 22:57:14,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:57:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-06 22:57:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-06 22:57:14,664 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:14,664 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:14,665 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:14,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:14,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1006359870, now seen corresponding path program 1 times [2018-11-06 22:57:14,665 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:14,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:14,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:14,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:57:14,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:14,731 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:57:14,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:57:14,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:57:14,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:57:14,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:57:14,735 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2018-11-06 22:57:14,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:14,785 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2018-11-06 22:57:14,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:57:14,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-11-06 22:57:14,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:14,787 INFO L225 Difference]: With dead ends: 44 [2018-11-06 22:57:14,787 INFO L226 Difference]: Without dead ends: 27 [2018-11-06 22:57:14,788 INFO L604 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 [2018-11-06 22:57:14,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-06 22:57:14,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-11-06 22:57:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-06 22:57:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-06 22:57:14,794 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2018-11-06 22:57:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:14,795 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-06 22:57:14,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:57:14,795 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-06 22:57:14,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-06 22:57:14,795 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:14,796 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:14,796 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:14,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:14,796 INFO L82 PathProgramCache]: Analyzing trace with hash -46699894, now seen corresponding path program 1 times [2018-11-06 22:57:14,797 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:14,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:14,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:14,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:57:14,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:14,881 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:57:14,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:57:14,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:57:14,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:57:14,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:57:14,882 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 3 states. [2018-11-06 22:57:14,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:14,938 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2018-11-06 22:57:14,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:57:14,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-11-06 22:57:14,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:14,940 INFO L225 Difference]: With dead ends: 46 [2018-11-06 22:57:14,940 INFO L226 Difference]: Without dead ends: 27 [2018-11-06 22:57:14,941 INFO L604 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 [2018-11-06 22:57:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-06 22:57:14,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2018-11-06 22:57:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-06 22:57:14,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2018-11-06 22:57:14,947 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 12 [2018-11-06 22:57:14,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:14,947 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2018-11-06 22:57:14,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:57:14,948 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2018-11-06 22:57:14,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-06 22:57:14,948 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:14,948 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:14,949 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:14,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:14,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1174173296, now seen corresponding path program 1 times [2018-11-06 22:57:14,949 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:14,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:14,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:14,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:57:14,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:15,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:57:15,064 INFO L225 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 [2018-11-06 22:57:15,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:57:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:15,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:15,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:57:15,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-11-06 22:57:15,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 22:57:15,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 22:57:15,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:57:15,194 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 4 states. [2018-11-06 22:57:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:15,357 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2018-11-06 22:57:15,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 22:57:15,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-11-06 22:57:15,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:15,363 INFO L225 Difference]: With dead ends: 50 [2018-11-06 22:57:15,364 INFO L226 Difference]: Without dead ends: 29 [2018-11-06 22:57:15,364 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:57:15,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-06 22:57:15,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2018-11-06 22:57:15,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-06 22:57:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2018-11-06 22:57:15,377 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2018-11-06 22:57:15,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:15,377 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2018-11-06 22:57:15,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 22:57:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2018-11-06 22:57:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-06 22:57:15,379 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:15,379 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:15,380 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:15,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:15,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1950613270, now seen corresponding path program 2 times [2018-11-06 22:57:15,381 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:15,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:15,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:15,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:57:15,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:15,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:57:15,794 INFO L225 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 [2018-11-06 22:57:15,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:57:15,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:57:15,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:15,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:15,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:57:15,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-06 22:57:15,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:57:15,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:57:15,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:57:15,884 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2018-11-06 22:57:15,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:15,970 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2018-11-06 22:57:15,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 22:57:15,971 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-11-06 22:57:15,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:15,972 INFO L225 Difference]: With dead ends: 54 [2018-11-06 22:57:15,972 INFO L226 Difference]: Without dead ends: 31 [2018-11-06 22:57:15,972 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:57:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-06 22:57:15,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2018-11-06 22:57:15,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-06 22:57:15,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2018-11-06 22:57:15,979 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2018-11-06 22:57:15,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:15,979 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2018-11-06 22:57:15,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:57:15,979 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2018-11-06 22:57:15,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-06 22:57:15,980 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:15,980 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:15,981 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:15,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:15,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1606604004, now seen corresponding path program 3 times [2018-11-06 22:57:15,981 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:15,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:15,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:15,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:15,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:16,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:57:16,117 INFO L225 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 [2018-11-06 22:57:16,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:57:16,161 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-06 22:57:16,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:16,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:16,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:57:16,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-06 22:57:16,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 22:57:16,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 22:57:16,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:57:16,226 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2018-11-06 22:57:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:16,278 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2018-11-06 22:57:16,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 22:57:16,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-11-06 22:57:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:16,280 INFO L225 Difference]: With dead ends: 58 [2018-11-06 22:57:16,280 INFO L226 Difference]: Without dead ends: 33 [2018-11-06 22:57:16,281 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:57:16,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-06 22:57:16,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-11-06 22:57:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-06 22:57:16,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2018-11-06 22:57:16,287 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 18 [2018-11-06 22:57:16,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:16,288 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2018-11-06 22:57:16,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 22:57:16,288 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2018-11-06 22:57:16,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-06 22:57:16,289 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:16,289 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:16,289 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:16,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:16,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1298436702, now seen corresponding path program 4 times [2018-11-06 22:57:16,290 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:16,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:16,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:16,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:16,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:16,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:57:16,637 INFO L225 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 [2018-11-06 22:57:16,654 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:57:16,669 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:57:16,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:16,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:16,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:57:16,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-06 22:57:16,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:57:16,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:57:16,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:57:16,771 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2018-11-06 22:57:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:16,998 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2018-11-06 22:57:16,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:57:16,999 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-11-06 22:57:17,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:17,000 INFO L225 Difference]: With dead ends: 62 [2018-11-06 22:57:17,001 INFO L226 Difference]: Without dead ends: 35 [2018-11-06 22:57:17,001 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:57:17,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-06 22:57:17,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2018-11-06 22:57:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-06 22:57:17,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2018-11-06 22:57:17,010 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2018-11-06 22:57:17,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:17,010 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2018-11-06 22:57:17,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:57:17,010 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2018-11-06 22:57:17,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-06 22:57:17,011 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:17,011 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:17,011 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:17,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:17,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1502402904, now seen corresponding path program 5 times [2018-11-06 22:57:17,012 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:17,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:17,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:17,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:17,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:17,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:57:17,591 INFO L225 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 [2018-11-06 22:57:17,608 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:57:17,695 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-06 22:57:17,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:17,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:17,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:57:17,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-06 22:57:17,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 22:57:17,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 22:57:17,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:57:17,787 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2018-11-06 22:57:17,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:17,893 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2018-11-06 22:57:17,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-06 22:57:17,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-11-06 22:57:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:17,896 INFO L225 Difference]: With dead ends: 66 [2018-11-06 22:57:17,896 INFO L226 Difference]: Without dead ends: 37 [2018-11-06 22:57:17,896 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:57:17,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-06 22:57:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2018-11-06 22:57:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-06 22:57:17,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2018-11-06 22:57:17,902 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 22 [2018-11-06 22:57:17,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:17,903 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2018-11-06 22:57:17,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 22:57:17,903 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2018-11-06 22:57:17,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-06 22:57:17,904 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:17,905 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:17,905 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:17,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:17,906 INFO L82 PathProgramCache]: Analyzing trace with hash 54572590, now seen corresponding path program 6 times [2018-11-06 22:57:17,906 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:17,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:17,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:17,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:17,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:18,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:57:18,313 INFO L225 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 [2018-11-06 22:57:18,324 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:57:18,361 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-06 22:57:18,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:18,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:18,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:57:18,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-06 22:57:18,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 22:57:18,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 22:57:18,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:57:18,407 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2018-11-06 22:57:18,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:18,505 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2018-11-06 22:57:18,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-06 22:57:18,507 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2018-11-06 22:57:18,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:18,508 INFO L225 Difference]: With dead ends: 70 [2018-11-06 22:57:18,508 INFO L226 Difference]: Without dead ends: 39 [2018-11-06 22:57:18,509 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:57:18,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-06 22:57:18,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-06 22:57:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-06 22:57:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2018-11-06 22:57:18,514 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 24 [2018-11-06 22:57:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:18,515 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2018-11-06 22:57:18,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 22:57:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2018-11-06 22:57:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-06 22:57:18,516 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:18,516 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:18,516 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:18,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:18,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1659403316, now seen corresponding path program 7 times [2018-11-06 22:57:18,517 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:18,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:18,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:18,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:18,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:18,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:57:18,790 INFO L225 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 [2018-11-06 22:57:18,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:57:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:18,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:18,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:57:18,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-06 22:57:18,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:57:18,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:57:18,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:57:18,865 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 10 states. [2018-11-06 22:57:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:19,004 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2018-11-06 22:57:19,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:57:19,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-11-06 22:57:19,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:19,007 INFO L225 Difference]: With dead ends: 74 [2018-11-06 22:57:19,008 INFO L226 Difference]: Without dead ends: 41 [2018-11-06 22:57:19,008 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:57:19,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-06 22:57:19,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2018-11-06 22:57:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-06 22:57:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2018-11-06 22:57:19,014 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2018-11-06 22:57:19,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:19,015 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2018-11-06 22:57:19,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:57:19,015 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2018-11-06 22:57:19,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-06 22:57:19,016 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:19,016 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:19,016 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:19,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:19,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2008471738, now seen corresponding path program 8 times [2018-11-06 22:57:19,017 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:19,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:19,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:19,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:57:19,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:19,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:57:19,367 INFO L225 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 [2018-11-06 22:57:19,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:57:19,389 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:57:19,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:19,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:19,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:57:19,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-06 22:57:19,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-06 22:57:19,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-06 22:57:19,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:57:19,440 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 11 states. [2018-11-06 22:57:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:19,590 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2018-11-06 22:57:19,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 22:57:19,596 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2018-11-06 22:57:19,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:19,597 INFO L225 Difference]: With dead ends: 78 [2018-11-06 22:57:19,598 INFO L226 Difference]: Without dead ends: 43 [2018-11-06 22:57:19,598 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:57:19,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-06 22:57:19,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2018-11-06 22:57:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-06 22:57:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2018-11-06 22:57:19,604 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2018-11-06 22:57:19,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:19,605 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2018-11-06 22:57:19,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-06 22:57:19,605 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2018-11-06 22:57:19,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-06 22:57:19,606 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:19,606 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:19,606 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:19,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:19,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1839191104, now seen corresponding path program 9 times [2018-11-06 22:57:19,607 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:19,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:19,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:19,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:19,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:19,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:57:19,881 INFO L225 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 [2018-11-06 22:57:19,890 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:58:37,973 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-06 22:58:37,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:39,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:39,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:39,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-06 22:58:39,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 22:58:39,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 22:58:39,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:58:39,666 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2018-11-06 22:58:39,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:39,781 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2018-11-06 22:58:39,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 22:58:39,782 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2018-11-06 22:58:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:39,783 INFO L225 Difference]: With dead ends: 82 [2018-11-06 22:58:39,783 INFO L226 Difference]: Without dead ends: 45 [2018-11-06 22:58:39,784 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:58:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-06 22:58:39,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2018-11-06 22:58:39,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-06 22:58:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2018-11-06 22:58:39,790 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 30 [2018-11-06 22:58:39,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:39,790 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2018-11-06 22:58:39,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 22:58:39,790 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2018-11-06 22:58:39,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-06 22:58:39,791 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:39,791 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:39,792 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:39,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:39,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1476340410, now seen corresponding path program 10 times [2018-11-06 22:58:39,792 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:39,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:39,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:39,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:39,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:40,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:40,180 INFO L225 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 [2018-11-06 22:58:40,190 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:58:40,205 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:58:40,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:40,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:40,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:40,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-06 22:58:40,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:58:40,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:58:40,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:58:40,316 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 13 states. [2018-11-06 22:58:40,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:40,728 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2018-11-06 22:58:40,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 22:58:40,728 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-11-06 22:58:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:40,729 INFO L225 Difference]: With dead ends: 86 [2018-11-06 22:58:40,729 INFO L226 Difference]: Without dead ends: 47 [2018-11-06 22:58:40,730 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:58:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-06 22:58:40,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-11-06 22:58:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-06 22:58:40,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2018-11-06 22:58:40,742 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 32 [2018-11-06 22:58:40,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:40,742 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2018-11-06 22:58:40,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:58:40,742 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2018-11-06 22:58:40,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-06 22:58:40,743 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:40,743 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:40,744 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:40,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:40,744 INFO L82 PathProgramCache]: Analyzing trace with hash -669174452, now seen corresponding path program 11 times [2018-11-06 22:58:40,744 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:40,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:40,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:40,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:40,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:41,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:41,086 INFO L225 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 [2018-11-06 22:58:41,098 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:59:19,333 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-06 22:59:19,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:19,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:19,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:19,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-06 22:59:19,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-06 22:59:19,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-06 22:59:19,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:59:19,788 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2018-11-06 22:59:20,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:20,025 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2018-11-06 22:59:20,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-06 22:59:20,026 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2018-11-06 22:59:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:20,027 INFO L225 Difference]: With dead ends: 90 [2018-11-06 22:59:20,027 INFO L226 Difference]: Without dead ends: 49 [2018-11-06 22:59:20,028 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:59:20,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-06 22:59:20,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2018-11-06 22:59:20,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-06 22:59:20,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2018-11-06 22:59:20,044 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2018-11-06 22:59:20,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:20,044 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2018-11-06 22:59:20,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-06 22:59:20,045 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2018-11-06 22:59:20,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-06 22:59:20,045 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:20,045 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:20,046 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:20,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:20,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1923197906, now seen corresponding path program 12 times [2018-11-06 22:59:20,047 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:20,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:20,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:20,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:20,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:20,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:20,615 INFO L225 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 [2018-11-06 22:59:20,625 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:59:33,779 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-06 22:59:33,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:33,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:33,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:33,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-06 22:59:33,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-06 22:59:33,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-06 22:59:33,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:59:33,837 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 15 states. [2018-11-06 22:59:34,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:34,012 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2018-11-06 22:59:34,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-06 22:59:34,012 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2018-11-06 22:59:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:34,013 INFO L225 Difference]: With dead ends: 94 [2018-11-06 22:59:34,013 INFO L226 Difference]: Without dead ends: 51 [2018-11-06 22:59:34,013 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:59:34,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-06 22:59:34,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2018-11-06 22:59:34,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-06 22:59:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2018-11-06 22:59:34,019 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 36 [2018-11-06 22:59:34,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:34,019 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2018-11-06 22:59:34,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-06 22:59:34,020 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2018-11-06 22:59:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-06 22:59:34,020 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:34,021 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:34,021 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:34,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:34,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2112002264, now seen corresponding path program 13 times [2018-11-06 22:59:34,021 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:34,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:34,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:34,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:34,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:35,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:35,060 INFO L225 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 [2018-11-06 22:59:35,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:59:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:35,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:35,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:35,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-06 22:59:35,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-06 22:59:35,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-06 22:59:35,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:59:35,142 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 16 states. [2018-11-06 22:59:35,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:35,385 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2018-11-06 22:59:35,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:59:35,385 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2018-11-06 22:59:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:35,386 INFO L225 Difference]: With dead ends: 98 [2018-11-06 22:59:35,386 INFO L226 Difference]: Without dead ends: 53 [2018-11-06 22:59:35,387 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:59:35,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-11-06 22:59:35,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2018-11-06 22:59:35,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-06 22:59:35,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2018-11-06 22:59:35,393 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 38 [2018-11-06 22:59:35,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:35,393 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2018-11-06 22:59:35,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-06 22:59:35,394 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2018-11-06 22:59:35,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-06 22:59:35,394 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:35,394 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:35,395 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:35,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:35,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1130603426, now seen corresponding path program 14 times [2018-11-06 22:59:35,395 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:35,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:35,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:35,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:59:35,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:35,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:35,734 INFO L225 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 [2018-11-06 22:59:35,744 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:59:35,759 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:59:35,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:35,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:35,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:35,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-06 22:59:35,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-06 22:59:35,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-06 22:59:35,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:59:35,828 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 17 states. [2018-11-06 22:59:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:36,076 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2018-11-06 22:59:36,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-06 22:59:36,076 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2018-11-06 22:59:36,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:36,077 INFO L225 Difference]: With dead ends: 102 [2018-11-06 22:59:36,077 INFO L226 Difference]: Without dead ends: 55 [2018-11-06 22:59:36,078 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:59:36,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-06 22:59:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2018-11-06 22:59:36,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-06 22:59:36,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-11-06 22:59:36,083 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 40 [2018-11-06 22:59:36,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:36,083 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-11-06 22:59:36,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-06 22:59:36,083 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-11-06 22:59:36,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-06 22:59:36,084 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:36,084 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:36,084 INFO L423 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:36,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:36,085 INFO L82 PathProgramCache]: Analyzing trace with hash 871585380, now seen corresponding path program 15 times [2018-11-06 22:59:36,085 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:36,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:36,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:36,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:36,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:37,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:37,006 INFO L225 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 [2018-11-06 22:59:37,013 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 23:00:02,308 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-06 23:00:02,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:02,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:02,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:02,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-06 23:00:02,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-06 23:00:02,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-06 23:00:02,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-11-06 23:00:02,417 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 18 states. [2018-11-06 23:00:02,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:02,966 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2018-11-06 23:00:02,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-06 23:00:02,968 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2018-11-06 23:00:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:02,969 INFO L225 Difference]: With dead ends: 106 [2018-11-06 23:00:02,969 INFO L226 Difference]: Without dead ends: 57 [2018-11-06 23:00:02,970 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-11-06 23:00:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-06 23:00:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2018-11-06 23:00:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-06 23:00:02,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2018-11-06 23:00:02,974 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 42 [2018-11-06 23:00:02,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:02,975 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2018-11-06 23:00:02,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-06 23:00:02,975 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2018-11-06 23:00:02,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-06 23:00:02,976 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:02,976 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:02,976 INFO L423 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:02,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:02,976 INFO L82 PathProgramCache]: Analyzing trace with hash 829679338, now seen corresponding path program 16 times [2018-11-06 23:00:02,976 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:02,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:02,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:02,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:02,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:03,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:03,436 INFO L225 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 [2018-11-06 23:00:03,449 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 23:00:03,477 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 23:00:03,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:03,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:03,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:03,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-06 23:00:03,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-06 23:00:03,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-06 23:00:03,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-06 23:00:03,517 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 19 states. [2018-11-06 23:00:03,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:03,883 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2018-11-06 23:00:03,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-06 23:00:03,890 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2018-11-06 23:00:03,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:03,891 INFO L225 Difference]: With dead ends: 110 [2018-11-06 23:00:03,891 INFO L226 Difference]: Without dead ends: 59 [2018-11-06 23:00:03,891 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-06 23:00:03,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-06 23:00:03,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2018-11-06 23:00:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-06 23:00:03,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2018-11-06 23:00:03,897 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 44 [2018-11-06 23:00:03,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:03,897 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2018-11-06 23:00:03,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-06 23:00:03,897 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2018-11-06 23:00:03,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-06 23:00:03,898 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:03,898 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:03,898 INFO L423 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:03,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:03,899 INFO L82 PathProgramCache]: Analyzing trace with hash -787321360, now seen corresponding path program 17 times [2018-11-06 23:00:03,899 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:03,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:03,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:03,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:03,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:04,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:04,335 INFO L225 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 [2018-11-06 23:00:04,344 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 23:01:26,724 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-06 23:01:26,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:01:27,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:01:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:27,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:01:27,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-06 23:01:27,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-06 23:01:27,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-06 23:01:27,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-11-06 23:01:27,452 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 20 states. [2018-11-06 23:01:27,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:01:27,901 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2018-11-06 23:01:27,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 23:01:27,903 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2018-11-06 23:01:27,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:01:27,904 INFO L225 Difference]: With dead ends: 114 [2018-11-06 23:01:27,904 INFO L226 Difference]: Without dead ends: 61 [2018-11-06 23:01:27,905 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-11-06 23:01:27,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-06 23:01:27,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-11-06 23:01:27,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-06 23:01:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2018-11-06 23:01:27,910 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 46 [2018-11-06 23:01:27,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:01:27,910 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2018-11-06 23:01:27,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-06 23:01:27,911 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2018-11-06 23:01:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-06 23:01:27,911 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:01:27,911 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 23:01:27,912 INFO L423 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:01:27,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:01:27,912 INFO L82 PathProgramCache]: Analyzing trace with hash 53169014, now seen corresponding path program 18 times [2018-11-06 23:01:27,912 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:01:27,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:01:27,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:27,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:01:27,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:01:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:28,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:01:28,326 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 23:01:28,336 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown