java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_false-unreach-call2_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-23 23:30:47,739 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 23:30:47,741 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 23:30:47,756 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 23:30:47,756 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 23:30:47,757 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 23:30:47,759 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 23:30:47,760 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 23:30:47,762 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 23:30:47,763 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 23:30:47,764 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 23:30:47,764 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 23:30:47,765 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 23:30:47,766 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 23:30:47,767 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 23:30:47,768 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 23:30:47,769 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 23:30:47,771 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 23:30:47,773 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 23:30:47,774 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 23:30:47,775 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 23:30:47,777 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 23:30:47,779 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-23 23:30:47,788 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-07-23 23:30:47,810 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 23:30:47,811 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 23:30:47,811 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-23 23:30:47,812 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-07-23 23:30:47,813 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-07-23 23:30:47,813 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-07-23 23:30:47,813 INFO L133 SettingsManager]: * Use SBE=true [2018-07-23 23:30:47,813 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-23 23:30:47,813 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-23 23:30:47,814 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-23 23:30:47,814 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-23 23:30:47,814 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-23 23:30:47,814 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-23 23:30:47,814 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-23 23:30:47,815 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-23 23:30:47,815 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 23:30:47,815 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-23 23:30:47,815 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-23 23:30:47,816 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-23 23:30:47,817 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-23 23:30:47,817 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 23:30:47,817 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-23 23:30:47,817 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-23 23:30:47,817 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-07-23 23:30:47,818 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-23 23:30:47,818 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-23 23:30:47,818 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 23:30:47,818 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-23 23:30:47,867 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 23:30:47,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 23:30:47,889 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 23:30:47,891 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-23 23:30:47,892 INFO L276 PluginConnector]: CDTParser initialized [2018-07-23 23:30:47,892 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_false-unreach-call2_true-termination.i [2018-07-23 23:30:48,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7045976d1/9c499fea55c846f1868d507484c32603/FLAG969a2c5e7 [2018-07-23 23:30:48,417 INFO L276 CDTParser]: Found 1 translation units. [2018-07-23 23:30:48,418 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_false-unreach-call2_true-termination.i [2018-07-23 23:30:48,425 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7045976d1/9c499fea55c846f1868d507484c32603/FLAG969a2c5e7 [2018-07-23 23:30:48,442 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7045976d1/9c499fea55c846f1868d507484c32603 [2018-07-23 23:30:48,453 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 23:30:48,454 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-23 23:30:48,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-23 23:30:48,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-23 23:30:48,462 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-23 23:30:48,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:30:48" (1/1) ... [2018-07-23 23:30:48,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f83590b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:30:48, skipping insertion in model container [2018-07-23 23:30:48,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:30:48" (1/1) ... [2018-07-23 23:30:48,626 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-23 23:30:48,666 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:30:48,683 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-23 23:30:48,693 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:30:48,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:30:48 WrapperNode [2018-07-23 23:30:48,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-23 23:30:48,715 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-23 23:30:48,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-23 23:30:48,715 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-23 23:30:48,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:30:48" (1/1) ... [2018-07-23 23:30:48,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:30:48" (1/1) ... [2018-07-23 23:30:48,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-23 23:30:48,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 23:30:48,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 23:30:48,755 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 23:30:48,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:30:48" (1/1) ... [2018-07-23 23:30:48,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:30:48" (1/1) ... [2018-07-23 23:30:48,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:30:48" (1/1) ... [2018-07-23 23:30:48,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:30:48" (1/1) ... [2018-07-23 23:30:48,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:30:48" (1/1) ... [2018-07-23 23:30:48,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:30:48" (1/1) ... [2018-07-23 23:30:48,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:30:48" (1/1) ... [2018-07-23 23:30:48,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 23:30:48,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 23:30:48,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 23:30:48,784 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 23:30:48,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:30:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-23 23:30:48,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 23:30:48,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 23:30:49,162 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 23:30:49,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:30:49 BoogieIcfgContainer [2018-07-23 23:30:49,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 23:30:49,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 23:30:49,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 23:30:49,168 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 23:30:49,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 11:30:48" (1/3) ... [2018-07-23 23:30:49,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@679d30f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:30:49, skipping insertion in model container [2018-07-23 23:30:49,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:30:48" (2/3) ... [2018-07-23 23:30:49,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@679d30f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:30:49, skipping insertion in model container [2018-07-23 23:30:49,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:30:49" (3/3) ... [2018-07-23 23:30:49,172 INFO L112 eAbstractionObserver]: Analyzing ICFG array_false-unreach-call2_true-termination.i [2018-07-23 23:30:49,182 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-23 23:30:49,190 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 23:30:49,240 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 23:30:49,241 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 23:30:49,241 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 23:30:49,241 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-23 23:30:49,241 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 23:30:49,241 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 23:30:49,242 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 23:30:49,242 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 23:30:49,242 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 23:30:49,259 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-07-23 23:30:49,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 23:30:49,266 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:49,267 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-07-23 23:30:49,267 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:49,273 INFO L82 PathProgramCache]: Analyzing trace with hash 889814567, now seen corresponding path program 1 times [2018-07-23 23:30:49,275 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:49,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:49,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:49,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:30:49,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:49,384 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:30:49,384 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 23:30:49,389 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-23 23:30:49,404 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-23 23:30:49,405 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-23 23:30:49,408 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-07-23 23:30:49,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:49,425 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-07-23 23:30:49,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-23 23:30:49,427 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-07-23 23:30:49,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:49,442 INFO L225 Difference]: With dead ends: 21 [2018-07-23 23:30:49,442 INFO L226 Difference]: Without dead ends: 9 [2018-07-23 23:30:49,446 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-23 23:30:49,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-23 23:30:49,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-07-23 23:30:49,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-23 23:30:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-07-23 23:30:49,483 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-07-23 23:30:49,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:49,484 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-07-23 23:30:49,484 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-23 23:30:49,484 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-07-23 23:30:49,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-23 23:30:49,485 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:49,485 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:49,485 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:49,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1805894861, now seen corresponding path program 1 times [2018-07-23 23:30:49,486 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:49,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:49,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:49,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:30:49,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:49,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:49,565 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:30:49,565 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 23:30:49,567 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 23:30:49,567 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 23:30:49,573 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:30:49,573 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2018-07-23 23:30:49,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:49,693 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-07-23 23:30:49,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 23:30:49,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-07-23 23:30:49,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:49,695 INFO L225 Difference]: With dead ends: 16 [2018-07-23 23:30:49,695 INFO L226 Difference]: Without dead ends: 12 [2018-07-23 23:30:49,696 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:30:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-23 23:30:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-07-23 23:30:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-23 23:30:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-07-23 23:30:49,700 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2018-07-23 23:30:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:49,700 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-07-23 23:30:49,700 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 23:30:49,701 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-07-23 23:30:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 23:30:49,701 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:49,701 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:49,702 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:49,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1994321781, now seen corresponding path program 1 times [2018-07-23 23:30:49,702 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:49,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:49,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:49,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:30:49,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:49,808 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:49,808 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:49,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:30:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:49,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:49,893 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:49,894 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-07-23 23:30:49,894 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 23:30:49,894 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 23:30:49,895 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 23:30:49,895 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-07-23 23:30:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:49,944 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-07-23 23:30:49,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 23:30:49,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-07-23 23:30:49,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:49,946 INFO L225 Difference]: With dead ends: 19 [2018-07-23 23:30:49,946 INFO L226 Difference]: Without dead ends: 15 [2018-07-23 23:30:49,947 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 23:30:49,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-23 23:30:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-07-23 23:30:49,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-23 23:30:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-07-23 23:30:49,950 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2018-07-23 23:30:49,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:49,951 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-07-23 23:30:49,951 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 23:30:49,951 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-07-23 23:30:49,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-23 23:30:49,952 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:49,952 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:49,952 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:49,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1089618957, now seen corresponding path program 2 times [2018-07-23 23:30:49,953 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:49,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:49,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:49,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:30:49,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:50,051 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:50,051 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:50,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:30:50,086 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:30:50,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:30:50,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:50,118 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:50,118 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-07-23 23:30:50,119 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 23:30:50,119 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 23:30:50,119 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 23:30:50,119 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2018-07-23 23:30:50,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:50,192 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-07-23 23:30:50,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 23:30:50,193 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-07-23 23:30:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:50,193 INFO L225 Difference]: With dead ends: 22 [2018-07-23 23:30:50,194 INFO L226 Difference]: Without dead ends: 18 [2018-07-23 23:30:50,194 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 23:30:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-23 23:30:50,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-07-23 23:30:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-23 23:30:50,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-07-23 23:30:50,198 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2018-07-23 23:30:50,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:50,198 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-07-23 23:30:50,198 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 23:30:50,199 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-07-23 23:30:50,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-23 23:30:50,199 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:50,199 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:50,199 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:50,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1122715979, now seen corresponding path program 3 times [2018-07-23 23:30:50,200 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:50,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:50,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:50,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:30:50,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:50,345 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:50,345 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:50,356 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:30:50,382 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-23 23:30:50,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:30:50,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:50,422 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:50,422 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-07-23 23:30:50,422 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 23:30:50,423 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 23:30:50,423 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 23:30:50,423 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2018-07-23 23:30:50,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:50,513 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-07-23 23:30:50,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 23:30:50,514 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-07-23 23:30:50,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:50,515 INFO L225 Difference]: With dead ends: 25 [2018-07-23 23:30:50,515 INFO L226 Difference]: Without dead ends: 21 [2018-07-23 23:30:50,515 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 23:30:50,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-23 23:30:50,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-07-23 23:30:50,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-23 23:30:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-07-23 23:30:50,519 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-07-23 23:30:50,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:50,519 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-07-23 23:30:50,519 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 23:30:50,520 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-07-23 23:30:50,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-23 23:30:50,520 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:50,520 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:50,520 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:50,520 INFO L82 PathProgramCache]: Analyzing trace with hash -726379699, now seen corresponding path program 4 times [2018-07-23 23:30:50,521 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:50,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:50,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:50,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:30:50,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:50,629 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:50,629 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:50,641 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:30:50,683 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:30:50,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:30:50,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:50,740 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:50,740 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-07-23 23:30:50,741 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 23:30:50,741 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 23:30:50,741 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 23:30:50,742 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2018-07-23 23:30:50,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:50,963 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-07-23 23:30:50,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 23:30:50,964 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-07-23 23:30:50,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:50,966 INFO L225 Difference]: With dead ends: 28 [2018-07-23 23:30:50,967 INFO L226 Difference]: Without dead ends: 24 [2018-07-23 23:30:50,967 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 23:30:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-23 23:30:50,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-07-23 23:30:50,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-07-23 23:30:50,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-07-23 23:30:50,974 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2018-07-23 23:30:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:50,975 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-07-23 23:30:50,975 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 23:30:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-07-23 23:30:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-23 23:30:50,977 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:50,977 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:50,977 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:50,978 INFO L82 PathProgramCache]: Analyzing trace with hash 114815499, now seen corresponding path program 5 times [2018-07-23 23:30:50,978 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:50,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:50,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:50,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:30:50,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:51,218 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:51,218 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:51,226 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:30:51,247 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-07-23 23:30:51,248 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:30:51,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:51,293 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:51,293 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-07-23 23:30:51,294 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 23:30:51,294 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 23:30:51,294 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 23:30:51,295 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 8 states. [2018-07-23 23:30:51,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:51,373 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-07-23 23:30:51,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 23:30:51,374 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-07-23 23:30:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:51,374 INFO L225 Difference]: With dead ends: 31 [2018-07-23 23:30:51,375 INFO L226 Difference]: Without dead ends: 27 [2018-07-23 23:30:51,375 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 23:30:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-23 23:30:51,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-07-23 23:30:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-23 23:30:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-07-23 23:30:51,379 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2018-07-23 23:30:51,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:51,379 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-07-23 23:30:51,380 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 23:30:51,380 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-07-23 23:30:51,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-23 23:30:51,381 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:51,381 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:51,381 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:51,381 INFO L82 PathProgramCache]: Analyzing trace with hash -973213043, now seen corresponding path program 6 times [2018-07-23 23:30:51,381 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:51,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:51,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:51,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:30:51,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:51,502 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:51,503 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:51,503 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:51,519 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:30:51,563 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-07-23 23:30:51,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:30:51,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:51,602 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:51,602 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-07-23 23:30:51,603 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 23:30:51,603 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 23:30:51,604 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 23:30:51,604 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2018-07-23 23:30:51,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:51,735 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-07-23 23:30:51,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 23:30:51,736 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-07-23 23:30:51,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:51,737 INFO L225 Difference]: With dead ends: 34 [2018-07-23 23:30:51,737 INFO L226 Difference]: Without dead ends: 30 [2018-07-23 23:30:51,738 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 23:30:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-07-23 23:30:51,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-07-23 23:30:51,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-07-23 23:30:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-07-23 23:30:51,742 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-07-23 23:30:51,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:51,743 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-07-23 23:30:51,743 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 23:30:51,743 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-07-23 23:30:51,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-23 23:30:51,744 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:51,744 INFO L353 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:51,744 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:51,744 INFO L82 PathProgramCache]: Analyzing trace with hash -313324853, now seen corresponding path program 7 times [2018-07-23 23:30:51,745 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:51,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:51,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:51,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:30:51,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:52,052 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:52,052 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:52,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:30:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:52,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:52,123 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:52,123 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-07-23 23:30:52,124 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 23:30:52,124 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 23:30:52,124 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 23:30:52,125 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 10 states. [2018-07-23 23:30:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:52,191 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-07-23 23:30:52,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 23:30:52,193 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-07-23 23:30:52,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:52,194 INFO L225 Difference]: With dead ends: 37 [2018-07-23 23:30:52,194 INFO L226 Difference]: Without dead ends: 33 [2018-07-23 23:30:52,195 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 23:30:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-07-23 23:30:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-07-23 23:30:52,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-23 23:30:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-07-23 23:30:52,200 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-07-23 23:30:52,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:52,200 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-07-23 23:30:52,200 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 23:30:52,200 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-07-23 23:30:52,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-23 23:30:52,203 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:52,203 INFO L353 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:52,204 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:52,204 INFO L82 PathProgramCache]: Analyzing trace with hash 350429645, now seen corresponding path program 8 times [2018-07-23 23:30:52,204 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:52,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:52,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:52,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:30:52,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:52,478 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:52,478 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:52,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:30:52,518 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:30:52,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:30:52,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:52,559 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:52,560 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-07-23 23:30:52,560 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 23:30:52,560 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 23:30:52,560 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 23:30:52,561 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2018-07-23 23:30:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:52,730 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-07-23 23:30:52,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 23:30:52,733 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-07-23 23:30:52,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:52,734 INFO L225 Difference]: With dead ends: 40 [2018-07-23 23:30:52,734 INFO L226 Difference]: Without dead ends: 36 [2018-07-23 23:30:52,734 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 23:30:52,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-23 23:30:52,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-07-23 23:30:52,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-23 23:30:52,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-07-23 23:30:52,740 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-07-23 23:30:52,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:52,741 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-07-23 23:30:52,741 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 23:30:52,741 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-07-23 23:30:52,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-23 23:30:52,743 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:52,743 INFO L353 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:52,743 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:52,744 INFO L82 PathProgramCache]: Analyzing trace with hash 231248779, now seen corresponding path program 9 times [2018-07-23 23:30:52,744 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:52,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:52,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:52,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:30:52,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:52,965 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:52,965 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:52,974 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:30:53,051 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-07-23 23:30:53,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:30:53,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:53,088 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:53,089 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-07-23 23:30:53,089 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 23:30:53,089 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 23:30:53,090 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 23:30:53,090 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 12 states. [2018-07-23 23:30:53,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:53,314 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-07-23 23:30:53,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 23:30:53,314 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-07-23 23:30:53,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:53,315 INFO L225 Difference]: With dead ends: 43 [2018-07-23 23:30:53,316 INFO L226 Difference]: Without dead ends: 39 [2018-07-23 23:30:53,316 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 23:30:53,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-23 23:30:53,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-07-23 23:30:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-07-23 23:30:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-07-23 23:30:53,321 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-07-23 23:30:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:53,322 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-07-23 23:30:53,322 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 23:30:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-07-23 23:30:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-07-23 23:30:53,323 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:53,323 INFO L353 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:53,323 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:53,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1652023565, now seen corresponding path program 10 times [2018-07-23 23:30:53,324 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:53,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:53,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:53,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:30:53,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:53,601 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:53,601 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:53,610 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:30:53,630 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:30:53,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:30:53,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:53,668 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:53,668 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-07-23 23:30:53,668 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 23:30:53,668 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 23:30:53,669 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-23 23:30:53,669 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 13 states. [2018-07-23 23:30:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:53,802 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-07-23 23:30:53,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-23 23:30:53,802 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-07-23 23:30:53,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:53,803 INFO L225 Difference]: With dead ends: 46 [2018-07-23 23:30:53,804 INFO L226 Difference]: Without dead ends: 42 [2018-07-23 23:30:53,804 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-23 23:30:53,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-23 23:30:53,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-07-23 23:30:53,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-07-23 23:30:53,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-07-23 23:30:53,810 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-07-23 23:30:53,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:53,810 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-07-23 23:30:53,810 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 23:30:53,811 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-07-23 23:30:53,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-23 23:30:53,812 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:53,812 INFO L353 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:53,812 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:53,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1050971211, now seen corresponding path program 11 times [2018-07-23 23:30:53,812 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:53,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:53,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:53,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:30:53,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:53,970 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:53,970 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:53,977 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:30:54,142 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-07-23 23:30:54,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:30:54,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:54,197 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:54,197 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-07-23 23:30:54,197 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 23:30:54,198 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 23:30:54,198 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 23:30:54,198 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 14 states. [2018-07-23 23:30:54,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:54,492 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-07-23 23:30:54,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 23:30:54,493 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2018-07-23 23:30:54,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:54,495 INFO L225 Difference]: With dead ends: 49 [2018-07-23 23:30:54,495 INFO L226 Difference]: Without dead ends: 45 [2018-07-23 23:30:54,496 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 23:30:54,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-07-23 23:30:54,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-07-23 23:30:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-23 23:30:54,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-07-23 23:30:54,500 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-07-23 23:30:54,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:54,501 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-07-23 23:30:54,501 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 23:30:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-07-23 23:30:54,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-23 23:30:54,502 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:54,502 INFO L353 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:54,502 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:54,503 INFO L82 PathProgramCache]: Analyzing trace with hash 818950221, now seen corresponding path program 12 times [2018-07-23 23:30:54,503 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:54,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:54,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:54,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:30:54,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:54,779 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:54,779 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:54,788 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:30:54,830 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-07-23 23:30:54,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:30:54,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:54,880 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:54,880 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-07-23 23:30:54,880 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 23:30:54,881 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 23:30:54,881 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 23:30:54,881 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 15 states. [2018-07-23 23:30:54,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:54,947 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-07-23 23:30:54,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 23:30:54,948 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-07-23 23:30:54,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:54,949 INFO L225 Difference]: With dead ends: 52 [2018-07-23 23:30:54,949 INFO L226 Difference]: Without dead ends: 48 [2018-07-23 23:30:54,950 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 23:30:54,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-07-23 23:30:54,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-07-23 23:30:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-07-23 23:30:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-07-23 23:30:54,956 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-07-23 23:30:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:54,956 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-07-23 23:30:54,956 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 23:30:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-07-23 23:30:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-23 23:30:54,957 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:54,958 INFO L353 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:54,958 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:54,958 INFO L82 PathProgramCache]: Analyzing trace with hash -715983605, now seen corresponding path program 13 times [2018-07-23 23:30:54,958 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:54,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:54,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:54,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:30:54,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:55,215 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:55,215 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:55,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:30:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:55,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:55,281 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:55,282 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-07-23 23:30:55,282 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 23:30:55,282 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 23:30:55,283 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-23 23:30:55,283 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 16 states. [2018-07-23 23:30:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:55,377 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-07-23 23:30:55,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 23:30:55,378 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2018-07-23 23:30:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:55,379 INFO L225 Difference]: With dead ends: 55 [2018-07-23 23:30:55,379 INFO L226 Difference]: Without dead ends: 51 [2018-07-23 23:30:55,380 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-23 23:30:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-07-23 23:30:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-07-23 23:30:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-07-23 23:30:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-07-23 23:30:55,387 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-07-23 23:30:55,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:55,387 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-07-23 23:30:55,387 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 23:30:55,387 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-07-23 23:30:55,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-07-23 23:30:55,388 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:55,388 INFO L353 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:55,389 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:55,389 INFO L82 PathProgramCache]: Analyzing trace with hash 587206541, now seen corresponding path program 14 times [2018-07-23 23:30:55,389 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:55,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:55,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:55,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:30:55,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:56,174 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:56,174 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:56,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:30:56,203 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:30:56,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:30:56,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:56,249 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:56,249 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-07-23 23:30:56,250 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 23:30:56,250 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 23:30:56,250 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 23:30:56,250 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 17 states. [2018-07-23 23:30:56,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:56,367 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-07-23 23:30:56,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 23:30:56,367 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-07-23 23:30:56,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:56,368 INFO L225 Difference]: With dead ends: 58 [2018-07-23 23:30:56,368 INFO L226 Difference]: Without dead ends: 54 [2018-07-23 23:30:56,369 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 23:30:56,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-07-23 23:30:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-07-23 23:30:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-23 23:30:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-07-23 23:30:56,373 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-07-23 23:30:56,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:56,373 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-07-23 23:30:56,374 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 23:30:56,374 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-07-23 23:30:56,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-23 23:30:56,374 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:56,375 INFO L353 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:56,375 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:56,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1715457483, now seen corresponding path program 15 times [2018-07-23 23:30:56,375 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:56,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:56,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:56,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:30:56,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:56,800 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:56,800 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:56,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:30:56,916 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-07-23 23:30:56,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:30:56,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:56,967 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:56,967 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-07-23 23:30:56,967 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 23:30:56,968 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 23:30:56,968 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 23:30:56,968 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 18 states. [2018-07-23 23:30:57,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:57,055 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-07-23 23:30:57,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 23:30:57,055 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-07-23 23:30:57,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:57,057 INFO L225 Difference]: With dead ends: 61 [2018-07-23 23:30:57,057 INFO L226 Difference]: Without dead ends: 57 [2018-07-23 23:30:57,058 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 23:30:57,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-07-23 23:30:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-07-23 23:30:57,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-07-23 23:30:57,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-07-23 23:30:57,064 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-07-23 23:30:57,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:57,064 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-07-23 23:30:57,064 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 23:30:57,065 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-07-23 23:30:57,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-23 23:30:57,065 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:57,065 INFO L353 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:57,066 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:57,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1025212109, now seen corresponding path program 16 times [2018-07-23 23:30:57,066 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:57,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:57,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:57,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:30:57,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:57,422 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:57,423 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:57,423 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:57,430 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:30:57,451 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:30:57,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:30:57,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:57,503 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:57,503 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-07-23 23:30:57,504 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 23:30:57,504 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 23:30:57,504 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-23 23:30:57,505 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 19 states. [2018-07-23 23:30:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:57,617 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-07-23 23:30:57,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 23:30:57,618 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-07-23 23:30:57,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:57,619 INFO L225 Difference]: With dead ends: 64 [2018-07-23 23:30:57,620 INFO L226 Difference]: Without dead ends: 60 [2018-07-23 23:30:57,621 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-23 23:30:57,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-07-23 23:30:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-07-23 23:30:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-07-23 23:30:57,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-07-23 23:30:57,625 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-07-23 23:30:57,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:57,626 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-07-23 23:30:57,626 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 23:30:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-07-23 23:30:57,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-23 23:30:57,627 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:57,627 INFO L353 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:57,627 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:57,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2066278773, now seen corresponding path program 17 times [2018-07-23 23:30:57,627 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:57,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:57,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:57,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:30:57,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:58,158 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:58,158 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:58,166 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:30:58,233 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-07-23 23:30:58,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:30:58,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:58,276 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:58,277 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-07-23 23:30:58,277 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 23:30:58,277 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 23:30:58,277 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:30:58,278 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 20 states. [2018-07-23 23:30:58,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:58,378 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-07-23 23:30:58,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 23:30:58,379 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2018-07-23 23:30:58,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:58,379 INFO L225 Difference]: With dead ends: 67 [2018-07-23 23:30:58,379 INFO L226 Difference]: Without dead ends: 63 [2018-07-23 23:30:58,380 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:30:58,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-07-23 23:30:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-07-23 23:30:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-07-23 23:30:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-07-23 23:30:58,392 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2018-07-23 23:30:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:58,393 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-07-23 23:30:58,393 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 23:30:58,393 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-07-23 23:30:58,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-07-23 23:30:58,394 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:58,394 INFO L353 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:58,396 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:58,397 INFO L82 PathProgramCache]: Analyzing trace with hash 607550989, now seen corresponding path program 18 times [2018-07-23 23:30:58,397 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:58,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:58,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:58,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:30:58,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:58,812 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:58,812 INFO L221 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 [2018-07-23 23:30:58,821 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:30:58,877 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-07-23 23:30:58,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:30:58,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:58,923 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:58,924 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-07-23 23:30:58,924 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 23:30:58,924 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 23:30:58,925 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 23:30:58,925 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 21 states. [2018-07-23 23:30:59,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:30:59,019 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-07-23 23:30:59,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 23:30:59,020 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2018-07-23 23:30:59,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:30:59,021 INFO L225 Difference]: With dead ends: 70 [2018-07-23 23:30:59,021 INFO L226 Difference]: Without dead ends: 66 [2018-07-23 23:30:59,022 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 23:30:59,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-07-23 23:30:59,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-07-23 23:30:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-07-23 23:30:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-07-23 23:30:59,026 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2018-07-23 23:30:59,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:30:59,027 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-07-23 23:30:59,027 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 23:30:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-07-23 23:30:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-07-23 23:30:59,027 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:30:59,028 INFO L353 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-07-23 23:30:59,028 INFO L414 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:30:59,028 INFO L82 PathProgramCache]: Analyzing trace with hash -2088448181, now seen corresponding path program 19 times [2018-07-23 23:30:59,028 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:30:59,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:30:59,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:59,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:30:59,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:30:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:59,910 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:30:59,910 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:30:59,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:30:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:30:59,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:30:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:30:59,984 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:30:59,984 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-07-23 23:30:59,985 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 23:30:59,985 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 23:30:59,985 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-23 23:30:59,985 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 22 states. [2018-07-23 23:31:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:00,123 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-07-23 23:31:00,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 23:31:00,124 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2018-07-23 23:31:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:00,124 INFO L225 Difference]: With dead ends: 73 [2018-07-23 23:31:00,124 INFO L226 Difference]: Without dead ends: 69 [2018-07-23 23:31:00,125 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-23 23:31:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-07-23 23:31:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-07-23 23:31:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-07-23 23:31:00,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-07-23 23:31:00,130 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2018-07-23 23:31:00,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:00,130 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-07-23 23:31:00,130 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 23:31:00,130 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-07-23 23:31:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-07-23 23:31:00,131 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:00,131 INFO L353 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:00,131 INFO L414 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:00,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1583680845, now seen corresponding path program 20 times [2018-07-23 23:31:00,131 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:00,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:00,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:00,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:31:00,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:00,515 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:00,515 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:00,529 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:31:00,562 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:31:00,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:00,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:00,614 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:00,615 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-07-23 23:31:00,615 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 23:31:00,615 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 23:31:00,616 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 23:31:00,616 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 23 states. [2018-07-23 23:31:00,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:00,864 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-07-23 23:31:00,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 23:31:00,867 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2018-07-23 23:31:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:00,868 INFO L225 Difference]: With dead ends: 76 [2018-07-23 23:31:00,868 INFO L226 Difference]: Without dead ends: 72 [2018-07-23 23:31:00,869 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 23:31:00,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-07-23 23:31:00,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-07-23 23:31:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-23 23:31:00,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-07-23 23:31:00,873 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2018-07-23 23:31:00,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:00,873 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-07-23 23:31:00,873 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 23:31:00,873 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-07-23 23:31:00,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-07-23 23:31:00,874 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:00,874 INFO L353 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:00,874 INFO L414 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:00,875 INFO L82 PathProgramCache]: Analyzing trace with hash 867497995, now seen corresponding path program 21 times [2018-07-23 23:31:00,875 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:00,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:00,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:00,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:00,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:01,318 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:01,318 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:01,330 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:31:01,392 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-07-23 23:31:01,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:01,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:01,433 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:01,433 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-07-23 23:31:01,433 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 23:31:01,434 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 23:31:01,434 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 23:31:01,434 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 24 states. [2018-07-23 23:31:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:01,536 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-07-23 23:31:01,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 23:31:01,536 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2018-07-23 23:31:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:01,537 INFO L225 Difference]: With dead ends: 79 [2018-07-23 23:31:01,538 INFO L226 Difference]: Without dead ends: 75 [2018-07-23 23:31:01,539 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 23:31:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-07-23 23:31:01,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-07-23 23:31:01,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-07-23 23:31:01,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-07-23 23:31:01,542 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2018-07-23 23:31:01,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:01,543 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-07-23 23:31:01,543 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 23:31:01,543 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-07-23 23:31:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-07-23 23:31:01,543 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:01,544 INFO L353 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:01,544 INFO L414 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:01,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1833227123, now seen corresponding path program 22 times [2018-07-23 23:31:01,544 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:01,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:01,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:01,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:01,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:01,956 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:01,957 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:01,971 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:31:01,997 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:31:01,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:01,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:02,056 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:02,056 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-07-23 23:31:02,056 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 23:31:02,057 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 23:31:02,057 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-23 23:31:02,057 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 25 states. [2018-07-23 23:31:02,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:02,168 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-07-23 23:31:02,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-23 23:31:02,169 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-07-23 23:31:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:02,170 INFO L225 Difference]: With dead ends: 82 [2018-07-23 23:31:02,171 INFO L226 Difference]: Without dead ends: 78 [2018-07-23 23:31:02,172 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-23 23:31:02,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-07-23 23:31:02,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-07-23 23:31:02,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-07-23 23:31:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-07-23 23:31:02,174 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2018-07-23 23:31:02,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:02,175 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-07-23 23:31:02,175 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 23:31:02,175 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-07-23 23:31:02,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-07-23 23:31:02,176 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:02,176 INFO L353 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:02,176 INFO L414 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:02,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1512861493, now seen corresponding path program 23 times [2018-07-23 23:31:02,176 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:02,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:02,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:02,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:02,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:02,651 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:02,651 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:02,658 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:31:02,754 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-07-23 23:31:02,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:02,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:02,801 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:02,801 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-07-23 23:31:02,801 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 23:31:02,801 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 23:31:02,802 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 23:31:02,802 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 26 states. [2018-07-23 23:31:02,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:02,932 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-07-23 23:31:02,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 23:31:02,932 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 76 [2018-07-23 23:31:02,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:02,933 INFO L225 Difference]: With dead ends: 85 [2018-07-23 23:31:02,933 INFO L226 Difference]: Without dead ends: 81 [2018-07-23 23:31:02,933 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 23:31:02,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-07-23 23:31:02,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2018-07-23 23:31:02,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-23 23:31:02,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-07-23 23:31:02,936 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2018-07-23 23:31:02,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:02,937 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-07-23 23:31:02,937 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 23:31:02,937 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-07-23 23:31:02,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-07-23 23:31:02,938 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:02,938 INFO L353 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:02,938 INFO L414 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:02,938 INFO L82 PathProgramCache]: Analyzing trace with hash -917709875, now seen corresponding path program 24 times [2018-07-23 23:31:02,938 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:02,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:02,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:02,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:02,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:03,842 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:03,842 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:03,850 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:31:03,932 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-07-23 23:31:03,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:03,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:03,986 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:03,986 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-07-23 23:31:03,986 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 23:31:03,987 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 23:31:03,987 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 23:31:03,987 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 27 states. [2018-07-23 23:31:04,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:04,076 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-07-23 23:31:04,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 23:31:04,076 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2018-07-23 23:31:04,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:04,077 INFO L225 Difference]: With dead ends: 88 [2018-07-23 23:31:04,077 INFO L226 Difference]: Without dead ends: 84 [2018-07-23 23:31:04,078 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 23:31:04,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-07-23 23:31:04,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2018-07-23 23:31:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-07-23 23:31:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-07-23 23:31:04,082 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2018-07-23 23:31:04,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:04,082 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-07-23 23:31:04,082 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 23:31:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-07-23 23:31:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-07-23 23:31:04,083 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:04,083 INFO L353 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:04,083 INFO L414 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:04,084 INFO L82 PathProgramCache]: Analyzing trace with hash -380855925, now seen corresponding path program 25 times [2018-07-23 23:31:04,084 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:04,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:04,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:04,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:04,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:04,875 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:04,875 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:04,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:31:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:04,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:04,966 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:04,966 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-07-23 23:31:04,967 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 23:31:04,967 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 23:31:04,967 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 23:31:04,968 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 28 states. [2018-07-23 23:31:05,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:05,247 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-07-23 23:31:05,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 23:31:05,248 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 82 [2018-07-23 23:31:05,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:05,249 INFO L225 Difference]: With dead ends: 91 [2018-07-23 23:31:05,249 INFO L226 Difference]: Without dead ends: 87 [2018-07-23 23:31:05,250 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 23:31:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-07-23 23:31:05,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-07-23 23:31:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-07-23 23:31:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-07-23 23:31:05,253 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 82 [2018-07-23 23:31:05,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:05,253 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-07-23 23:31:05,253 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 23:31:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-07-23 23:31:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-07-23 23:31:05,254 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:05,254 INFO L353 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:05,255 INFO L414 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:05,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1423041779, now seen corresponding path program 26 times [2018-07-23 23:31:05,255 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:05,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:05,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:05,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:31:05,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:06,311 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:06,311 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:06,318 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:31:06,361 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:31:06,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:06,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:06,408 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:06,408 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-07-23 23:31:06,409 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 23:31:06,409 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 23:31:06,409 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 23:31:06,409 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 29 states. [2018-07-23 23:31:06,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:06,566 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-07-23 23:31:06,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 23:31:06,567 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2018-07-23 23:31:06,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:06,568 INFO L225 Difference]: With dead ends: 94 [2018-07-23 23:31:06,568 INFO L226 Difference]: Without dead ends: 90 [2018-07-23 23:31:06,569 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 23:31:06,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-07-23 23:31:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-07-23 23:31:06,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 23:31:06,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-07-23 23:31:06,572 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 85 [2018-07-23 23:31:06,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:06,572 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-07-23 23:31:06,572 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 23:31:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-07-23 23:31:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-07-23 23:31:06,573 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:06,573 INFO L353 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:06,573 INFO L414 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:06,574 INFO L82 PathProgramCache]: Analyzing trace with hash -863235509, now seen corresponding path program 27 times [2018-07-23 23:31:06,574 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:06,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:06,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:06,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:06,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:06,984 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:06,984 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:06,992 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:31:07,093 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-07-23 23:31:07,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:07,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:07,155 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:07,155 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-07-23 23:31:07,156 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 23:31:07,156 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 23:31:07,156 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 23:31:07,156 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 30 states. [2018-07-23 23:31:07,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:07,260 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-07-23 23:31:07,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 23:31:07,261 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 88 [2018-07-23 23:31:07,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:07,262 INFO L225 Difference]: With dead ends: 97 [2018-07-23 23:31:07,262 INFO L226 Difference]: Without dead ends: 93 [2018-07-23 23:31:07,263 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 23:31:07,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-07-23 23:31:07,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2018-07-23 23:31:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-07-23 23:31:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-07-23 23:31:07,267 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 88 [2018-07-23 23:31:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:07,267 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-07-23 23:31:07,267 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 23:31:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-07-23 23:31:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-07-23 23:31:07,268 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:07,268 INFO L353 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:07,268 INFO L414 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:07,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1032656307, now seen corresponding path program 28 times [2018-07-23 23:31:07,268 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:07,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:07,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:07,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:07,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:07,703 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:07,703 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:07,711 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:31:07,740 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:31:07,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:07,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:07,788 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:07,788 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-07-23 23:31:07,788 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 23:31:07,788 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 23:31:07,789 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-23 23:31:07,789 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 31 states. [2018-07-23 23:31:07,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:07,890 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-07-23 23:31:07,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-23 23:31:07,891 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2018-07-23 23:31:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:07,892 INFO L225 Difference]: With dead ends: 100 [2018-07-23 23:31:07,892 INFO L226 Difference]: Without dead ends: 96 [2018-07-23 23:31:07,893 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-23 23:31:07,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-07-23 23:31:07,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2018-07-23 23:31:07,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-07-23 23:31:07,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-07-23 23:31:07,896 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 91 [2018-07-23 23:31:07,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:07,896 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-07-23 23:31:07,896 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 23:31:07,896 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-07-23 23:31:07,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-07-23 23:31:07,896 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:07,897 INFO L353 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:07,897 INFO L414 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:07,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1661076725, now seen corresponding path program 29 times [2018-07-23 23:31:07,897 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:07,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:07,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:07,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:07,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:08,564 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:08,564 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:08,573 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:31:08,774 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-07-23 23:31:08,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:08,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:08,812 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:08,812 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-07-23 23:31:08,813 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 23:31:08,813 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 23:31:08,813 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 23:31:08,813 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 32 states. [2018-07-23 23:31:08,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:08,999 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-07-23 23:31:08,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 23:31:08,999 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 94 [2018-07-23 23:31:09,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:09,000 INFO L225 Difference]: With dead ends: 103 [2018-07-23 23:31:09,000 INFO L226 Difference]: Without dead ends: 99 [2018-07-23 23:31:09,001 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 23:31:09,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-07-23 23:31:09,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2018-07-23 23:31:09,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 23:31:09,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-07-23 23:31:09,004 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 94 [2018-07-23 23:31:09,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:09,004 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-07-23 23:31:09,004 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 23:31:09,004 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-07-23 23:31:09,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-07-23 23:31:09,004 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:09,005 INFO L353 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:09,005 INFO L414 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:09,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1171306099, now seen corresponding path program 30 times [2018-07-23 23:31:09,005 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:09,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:09,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:09,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:09,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:09,563 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:09,563 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:09,571 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:31:09,684 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-07-23 23:31:09,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:09,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:09,732 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:09,732 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-07-23 23:31:09,732 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 23:31:09,733 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 23:31:09,733 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 23:31:09,733 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 33 states. [2018-07-23 23:31:09,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:09,856 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-07-23 23:31:09,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-23 23:31:09,857 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2018-07-23 23:31:09,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:09,858 INFO L225 Difference]: With dead ends: 106 [2018-07-23 23:31:09,858 INFO L226 Difference]: Without dead ends: 102 [2018-07-23 23:31:09,859 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 23:31:09,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-07-23 23:31:09,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2018-07-23 23:31:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-07-23 23:31:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-07-23 23:31:09,863 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 97 [2018-07-23 23:31:09,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:09,863 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-07-23 23:31:09,863 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 23:31:09,863 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-07-23 23:31:09,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-07-23 23:31:09,864 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:09,864 INFO L353 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:09,864 INFO L414 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:09,864 INFO L82 PathProgramCache]: Analyzing trace with hash -418491445, now seen corresponding path program 31 times [2018-07-23 23:31:09,864 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:09,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:09,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:09,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:09,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:10,621 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:10,621 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:10,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:31:10,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:10,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:10,723 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:10,723 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-07-23 23:31:10,724 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 23:31:10,724 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 23:31:10,724 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 23:31:10,724 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 34 states. [2018-07-23 23:31:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:10,847 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-07-23 23:31:10,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 23:31:10,847 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 100 [2018-07-23 23:31:10,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:10,849 INFO L225 Difference]: With dead ends: 109 [2018-07-23 23:31:10,849 INFO L226 Difference]: Without dead ends: 105 [2018-07-23 23:31:10,850 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 23:31:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-07-23 23:31:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2018-07-23 23:31:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-07-23 23:31:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-07-23 23:31:10,853 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 100 [2018-07-23 23:31:10,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:10,853 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-07-23 23:31:10,854 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 23:31:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-07-23 23:31:10,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-07-23 23:31:10,854 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:10,854 INFO L353 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:10,854 INFO L414 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:10,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1636353843, now seen corresponding path program 32 times [2018-07-23 23:31:10,855 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:10,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:10,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:10,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:31:10,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:11,365 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:11,365 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:11,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:31:11,416 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:31:11,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:11,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:11,456 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:11,457 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-07-23 23:31:11,457 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 23:31:11,457 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 23:31:11,458 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 23:31:11,458 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 35 states. [2018-07-23 23:31:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:11,607 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-07-23 23:31:11,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 23:31:11,608 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2018-07-23 23:31:11,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:11,609 INFO L225 Difference]: With dead ends: 112 [2018-07-23 23:31:11,609 INFO L226 Difference]: Without dead ends: 108 [2018-07-23 23:31:11,610 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 23:31:11,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-07-23 23:31:11,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2018-07-23 23:31:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 23:31:11,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-07-23 23:31:11,613 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 103 [2018-07-23 23:31:11,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:11,614 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-07-23 23:31:11,614 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 23:31:11,614 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-07-23 23:31:11,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-07-23 23:31:11,614 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:11,614 INFO L353 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:11,615 INFO L414 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:11,615 INFO L82 PathProgramCache]: Analyzing trace with hash 908663947, now seen corresponding path program 33 times [2018-07-23 23:31:11,615 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:11,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:11,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:11,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:11,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:12,169 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:12,170 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:12,177 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:31:12,335 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-07-23 23:31:12,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:12,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:12,391 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:12,392 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-07-23 23:31:12,392 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 23:31:12,392 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 23:31:12,393 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 23:31:12,393 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 36 states. [2018-07-23 23:31:12,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:12,616 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-07-23 23:31:12,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 23:31:12,616 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 106 [2018-07-23 23:31:12,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:12,618 INFO L225 Difference]: With dead ends: 115 [2018-07-23 23:31:12,618 INFO L226 Difference]: Without dead ends: 111 [2018-07-23 23:31:12,619 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 23:31:12,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-07-23 23:31:12,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-07-23 23:31:12,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-07-23 23:31:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-07-23 23:31:12,622 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 106 [2018-07-23 23:31:12,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:12,622 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-07-23 23:31:12,623 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 23:31:12,623 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-07-23 23:31:12,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-07-23 23:31:12,623 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:12,623 INFO L353 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:12,624 INFO L414 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:12,624 INFO L82 PathProgramCache]: Analyzing trace with hash 475969549, now seen corresponding path program 34 times [2018-07-23 23:31:12,624 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:12,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:12,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:12,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:12,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:13,304 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:13,304 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:13,312 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:31:13,348 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:31:13,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:13,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:13,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:13,393 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:13,393 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-07-23 23:31:13,394 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 23:31:13,394 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 23:31:13,394 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 23:31:13,394 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 37 states. [2018-07-23 23:31:13,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:13,560 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-07-23 23:31:13,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-23 23:31:13,560 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2018-07-23 23:31:13,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:13,561 INFO L225 Difference]: With dead ends: 118 [2018-07-23 23:31:13,561 INFO L226 Difference]: Without dead ends: 114 [2018-07-23 23:31:13,562 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 23:31:13,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-07-23 23:31:13,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-07-23 23:31:13,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-07-23 23:31:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-07-23 23:31:13,565 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 109 [2018-07-23 23:31:13,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:13,566 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-07-23 23:31:13,566 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 23:31:13,566 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-07-23 23:31:13,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-07-23 23:31:13,566 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:13,567 INFO L353 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:13,567 INFO L414 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:13,567 INFO L82 PathProgramCache]: Analyzing trace with hash -725985973, now seen corresponding path program 35 times [2018-07-23 23:31:13,567 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:13,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:13,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:13,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:13,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:14,529 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:14,529 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:14,537 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:31:14,856 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-07-23 23:31:14,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:14,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:14,904 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:14,904 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-07-23 23:31:14,904 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 23:31:14,904 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 23:31:14,905 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 23:31:14,905 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 38 states. [2018-07-23 23:31:15,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:15,036 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-07-23 23:31:15,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 23:31:15,036 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 112 [2018-07-23 23:31:15,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:15,038 INFO L225 Difference]: With dead ends: 121 [2018-07-23 23:31:15,038 INFO L226 Difference]: Without dead ends: 117 [2018-07-23 23:31:15,039 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 23:31:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-07-23 23:31:15,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2018-07-23 23:31:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 23:31:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-07-23 23:31:15,041 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 112 [2018-07-23 23:31:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:15,042 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-07-23 23:31:15,042 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 23:31:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-07-23 23:31:15,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-07-23 23:31:15,043 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:15,043 INFO L353 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:15,043 INFO L414 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:15,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1040595123, now seen corresponding path program 36 times [2018-07-23 23:31:15,043 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:15,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:15,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:15,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:15,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:15,880 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:15,880 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:15,888 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:31:16,046 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-07-23 23:31:16,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:16,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:16,103 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:16,103 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-07-23 23:31:16,104 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 23:31:16,104 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 23:31:16,105 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 23:31:16,105 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 39 states. [2018-07-23 23:31:16,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:16,654 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-07-23 23:31:16,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 23:31:16,654 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2018-07-23 23:31:16,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:16,656 INFO L225 Difference]: With dead ends: 124 [2018-07-23 23:31:16,656 INFO L226 Difference]: Without dead ends: 120 [2018-07-23 23:31:16,657 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 23:31:16,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-07-23 23:31:16,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2018-07-23 23:31:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-07-23 23:31:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-07-23 23:31:16,660 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 115 [2018-07-23 23:31:16,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:16,660 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-07-23 23:31:16,660 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 23:31:16,660 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-07-23 23:31:16,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-07-23 23:31:16,661 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:16,661 INFO L353 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:16,661 INFO L414 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:16,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1943142901, now seen corresponding path program 37 times [2018-07-23 23:31:16,662 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:16,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:16,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:16,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:16,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:18,114 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:18,114 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:18,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:31:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:18,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:18,218 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:18,218 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-07-23 23:31:18,218 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 23:31:18,219 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 23:31:18,219 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 23:31:18,219 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 40 states. [2018-07-23 23:31:18,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:18,549 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-07-23 23:31:18,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-23 23:31:18,549 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 118 [2018-07-23 23:31:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:18,550 INFO L225 Difference]: With dead ends: 127 [2018-07-23 23:31:18,550 INFO L226 Difference]: Without dead ends: 123 [2018-07-23 23:31:18,551 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 23:31:18,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-07-23 23:31:18,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2018-07-23 23:31:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-07-23 23:31:18,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-07-23 23:31:18,554 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 118 [2018-07-23 23:31:18,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:18,555 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-07-23 23:31:18,555 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 23:31:18,555 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-07-23 23:31:18,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-07-23 23:31:18,556 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:18,556 INFO L353 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:18,556 INFO L414 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:18,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1046242957, now seen corresponding path program 38 times [2018-07-23 23:31:18,556 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:18,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:18,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:18,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:31:18,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:19,370 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:19,370 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:19,380 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:31:19,424 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:31:19,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:19,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:19,474 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:19,474 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-07-23 23:31:19,475 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 23:31:19,475 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 23:31:19,475 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:31:19,476 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 41 states. [2018-07-23 23:31:19,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:19,634 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-07-23 23:31:19,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 23:31:19,634 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 121 [2018-07-23 23:31:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:19,636 INFO L225 Difference]: With dead ends: 130 [2018-07-23 23:31:19,636 INFO L226 Difference]: Without dead ends: 126 [2018-07-23 23:31:19,637 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:31:19,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-07-23 23:31:19,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2018-07-23 23:31:19,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-23 23:31:19,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-07-23 23:31:19,641 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 121 [2018-07-23 23:31:19,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:19,641 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-07-23 23:31:19,641 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 23:31:19,641 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-07-23 23:31:19,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-07-23 23:31:19,642 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:19,642 INFO L353 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:19,642 INFO L414 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:19,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1693456075, now seen corresponding path program 39 times [2018-07-23 23:31:19,642 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:19,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:19,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:19,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:19,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:20,737 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:20,737 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:20,744 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:31:20,987 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-07-23 23:31:20,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:20,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:21,028 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:21,028 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-07-23 23:31:21,029 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 23:31:21,029 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 23:31:21,029 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 23:31:21,030 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 42 states. [2018-07-23 23:31:21,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:21,245 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-07-23 23:31:21,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 23:31:21,246 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 124 [2018-07-23 23:31:21,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:21,247 INFO L225 Difference]: With dead ends: 133 [2018-07-23 23:31:21,248 INFO L226 Difference]: Without dead ends: 129 [2018-07-23 23:31:21,249 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 23:31:21,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-07-23 23:31:21,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2018-07-23 23:31:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-07-23 23:31:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-07-23 23:31:21,253 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 124 [2018-07-23 23:31:21,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:21,253 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-07-23 23:31:21,253 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 23:31:21,253 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-07-23 23:31:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-07-23 23:31:21,254 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:21,254 INFO L353 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:21,254 INFO L414 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:21,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1583704627, now seen corresponding path program 40 times [2018-07-23 23:31:21,255 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:21,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:21,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:21,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:21,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:23,517 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:23,517 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:23,534 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:31:23,587 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:31:23,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:23,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:23,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:23,627 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:23,627 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-07-23 23:31:23,628 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 23:31:23,628 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 23:31:23,628 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 23:31:23,629 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 43 states. [2018-07-23 23:31:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:23,854 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-07-23 23:31:23,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-23 23:31:23,855 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2018-07-23 23:31:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:23,856 INFO L225 Difference]: With dead ends: 136 [2018-07-23 23:31:23,856 INFO L226 Difference]: Without dead ends: 132 [2018-07-23 23:31:23,857 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 23:31:23,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-07-23 23:31:23,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2018-07-23 23:31:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-07-23 23:31:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-07-23 23:31:23,861 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 127 [2018-07-23 23:31:23,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:23,861 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-07-23 23:31:23,861 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 23:31:23,862 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-07-23 23:31:23,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-07-23 23:31:23,862 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:23,862 INFO L353 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:23,863 INFO L414 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:23,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1718394763, now seen corresponding path program 41 times [2018-07-23 23:31:23,863 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:23,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:23,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:23,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:23,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:24,915 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:24,915 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:24,922 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:31:25,457 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-07-23 23:31:25,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:25,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:25,516 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:25,517 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-07-23 23:31:25,517 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 23:31:25,518 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 23:31:25,518 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:31:25,519 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 44 states. [2018-07-23 23:31:25,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:25,677 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-07-23 23:31:25,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 23:31:25,677 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 130 [2018-07-23 23:31:25,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:25,679 INFO L225 Difference]: With dead ends: 139 [2018-07-23 23:31:25,679 INFO L226 Difference]: Without dead ends: 135 [2018-07-23 23:31:25,680 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:31:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-07-23 23:31:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2018-07-23 23:31:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-07-23 23:31:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-07-23 23:31:25,684 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 130 [2018-07-23 23:31:25,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:25,684 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-07-23 23:31:25,684 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 23:31:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-07-23 23:31:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-07-23 23:31:25,685 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:25,685 INFO L353 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:25,685 INFO L414 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:25,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1664592627, now seen corresponding path program 42 times [2018-07-23 23:31:25,686 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:25,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:25,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:25,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:25,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:27,043 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:27,044 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:27,050 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:31:27,336 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-07-23 23:31:27,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:27,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:27,401 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:27,401 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-07-23 23:31:27,402 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 23:31:27,402 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 23:31:27,403 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 23:31:27,403 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 45 states. [2018-07-23 23:31:28,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:28,583 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-07-23 23:31:28,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-23 23:31:28,583 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2018-07-23 23:31:28,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:28,584 INFO L225 Difference]: With dead ends: 142 [2018-07-23 23:31:28,585 INFO L226 Difference]: Without dead ends: 138 [2018-07-23 23:31:28,586 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 23:31:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-07-23 23:31:28,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-07-23 23:31:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-07-23 23:31:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-07-23 23:31:28,589 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 133 [2018-07-23 23:31:28,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:28,589 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-07-23 23:31:28,589 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 23:31:28,589 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-07-23 23:31:28,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-07-23 23:31:28,590 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:28,590 INFO L353 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:28,590 INFO L414 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:28,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1460639819, now seen corresponding path program 43 times [2018-07-23 23:31:28,590 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:28,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:28,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:28,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:28,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:29,553 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:29,553 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:29,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:31:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:29,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:29,652 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:29,652 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-07-23 23:31:29,652 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 23:31:29,653 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 23:31:29,653 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 23:31:29,653 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 46 states. [2018-07-23 23:31:30,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:30,591 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-07-23 23:31:30,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 23:31:30,592 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 136 [2018-07-23 23:31:30,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:30,593 INFO L225 Difference]: With dead ends: 145 [2018-07-23 23:31:30,593 INFO L226 Difference]: Without dead ends: 141 [2018-07-23 23:31:30,594 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 23:31:30,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-07-23 23:31:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2018-07-23 23:31:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-07-23 23:31:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-07-23 23:31:30,597 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 136 [2018-07-23 23:31:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:30,597 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-07-23 23:31:30,597 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 23:31:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-07-23 23:31:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-07-23 23:31:30,598 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:30,598 INFO L353 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:30,599 INFO L414 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:30,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1040604083, now seen corresponding path program 44 times [2018-07-23 23:31:30,599 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:30,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:30,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:30,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:31:30,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:31,669 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:31,669 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:31,679 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:31:31,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:31:31,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:31,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:31,797 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:31,798 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-07-23 23:31:31,798 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 23:31:31,798 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 23:31:31,798 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 23:31:31,799 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 47 states. [2018-07-23 23:31:31,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:31,950 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-07-23 23:31:31,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 23:31:31,951 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2018-07-23 23:31:31,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:31,952 INFO L225 Difference]: With dead ends: 148 [2018-07-23 23:31:31,952 INFO L226 Difference]: Without dead ends: 144 [2018-07-23 23:31:31,952 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 23:31:31,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-07-23 23:31:31,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2018-07-23 23:31:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-07-23 23:31:31,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-07-23 23:31:31,955 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 139 [2018-07-23 23:31:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:31,956 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-07-23 23:31:31,956 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 23:31:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-07-23 23:31:31,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-07-23 23:31:31,956 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:31,956 INFO L353 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:31,956 INFO L414 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:31,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2084897035, now seen corresponding path program 45 times [2018-07-23 23:31:31,957 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:31,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:31,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:31,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:31,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:32,908 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:32,908 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:32,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:31:33,280 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-07-23 23:31:33,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:33,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:33,345 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:33,346 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-07-23 23:31:33,346 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 23:31:33,347 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 23:31:33,347 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 23:31:33,347 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 48 states. [2018-07-23 23:31:33,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:33,569 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-07-23 23:31:33,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 23:31:33,569 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 142 [2018-07-23 23:31:33,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:33,571 INFO L225 Difference]: With dead ends: 151 [2018-07-23 23:31:33,571 INFO L226 Difference]: Without dead ends: 147 [2018-07-23 23:31:33,571 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 23:31:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-07-23 23:31:33,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2018-07-23 23:31:33,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-07-23 23:31:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-07-23 23:31:33,576 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 142 [2018-07-23 23:31:33,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:33,576 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-07-23 23:31:33,576 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 23:31:33,576 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-07-23 23:31:33,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-07-23 23:31:33,577 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:33,577 INFO L353 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:33,578 INFO L414 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:33,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1002273907, now seen corresponding path program 46 times [2018-07-23 23:31:33,578 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:33,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:33,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:33,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:33,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:34,728 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:34,728 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:34,738 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:31:34,788 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:31:34,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:34,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:34,856 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:34,857 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-07-23 23:31:34,857 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 23:31:34,858 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 23:31:34,858 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 23:31:34,858 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 49 states. [2018-07-23 23:31:35,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:35,199 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-07-23 23:31:35,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-23 23:31:35,199 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 145 [2018-07-23 23:31:35,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:35,201 INFO L225 Difference]: With dead ends: 154 [2018-07-23 23:31:35,201 INFO L226 Difference]: Without dead ends: 150 [2018-07-23 23:31:35,201 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 23:31:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-07-23 23:31:35,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2018-07-23 23:31:35,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-07-23 23:31:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-07-23 23:31:35,206 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 145 [2018-07-23 23:31:35,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:35,206 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-07-23 23:31:35,206 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 23:31:35,206 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-07-23 23:31:35,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-07-23 23:31:35,207 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:35,207 INFO L353 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:35,207 INFO L414 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:35,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1517869515, now seen corresponding path program 47 times [2018-07-23 23:31:35,207 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:35,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:35,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:35,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:35,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:36,148 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:36,148 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:36,156 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:31:37,029 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-07-23 23:31:37,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:37,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:37,119 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:37,119 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-07-23 23:31:37,119 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 23:31:37,120 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 23:31:37,120 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 23:31:37,120 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 50 states. [2018-07-23 23:31:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:37,355 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-07-23 23:31:37,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 23:31:37,356 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 148 [2018-07-23 23:31:37,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:37,357 INFO L225 Difference]: With dead ends: 157 [2018-07-23 23:31:37,357 INFO L226 Difference]: Without dead ends: 153 [2018-07-23 23:31:37,358 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 23:31:37,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-07-23 23:31:37,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2018-07-23 23:31:37,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-07-23 23:31:37,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-07-23 23:31:37,361 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 148 [2018-07-23 23:31:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:37,362 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-07-23 23:31:37,362 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 23:31:37,362 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-07-23 23:31:37,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-07-23 23:31:37,363 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:37,363 INFO L353 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:37,363 INFO L414 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:37,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1212747059, now seen corresponding path program 48 times [2018-07-23 23:31:37,363 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:37,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:37,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:37,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:37,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:38,355 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:38,355 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:38,361 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:31:38,715 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-07-23 23:31:38,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:38,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:38,768 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:38,768 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-07-23 23:31:38,769 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 23:31:38,769 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 23:31:38,769 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 23:31:38,770 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 51 states. [2018-07-23 23:31:39,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:39,018 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-07-23 23:31:39,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-23 23:31:39,018 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 151 [2018-07-23 23:31:39,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:39,019 INFO L225 Difference]: With dead ends: 160 [2018-07-23 23:31:39,019 INFO L226 Difference]: Without dead ends: 156 [2018-07-23 23:31:39,020 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 23:31:39,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-07-23 23:31:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2018-07-23 23:31:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-07-23 23:31:39,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-07-23 23:31:39,023 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 151 [2018-07-23 23:31:39,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:39,023 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-07-23 23:31:39,023 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 23:31:39,023 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-07-23 23:31:39,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-07-23 23:31:39,024 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:39,024 INFO L353 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:39,024 INFO L414 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:39,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1964450443, now seen corresponding path program 49 times [2018-07-23 23:31:39,024 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:39,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:39,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:39,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:39,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:40,353 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:40,353 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:40,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:31:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:40,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:40,493 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:40,493 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-07-23 23:31:40,494 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 23:31:40,495 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 23:31:40,495 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 23:31:40,495 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 52 states. [2018-07-23 23:31:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:40,747 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-07-23 23:31:40,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 23:31:40,747 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 154 [2018-07-23 23:31:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:40,748 INFO L225 Difference]: With dead ends: 163 [2018-07-23 23:31:40,749 INFO L226 Difference]: Without dead ends: 159 [2018-07-23 23:31:40,749 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 23:31:40,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-07-23 23:31:40,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2018-07-23 23:31:40,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-07-23 23:31:40,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-07-23 23:31:40,752 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 154 [2018-07-23 23:31:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:40,753 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-07-23 23:31:40,753 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 23:31:40,753 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-07-23 23:31:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-07-23 23:31:40,754 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:40,754 INFO L353 BasicCegarLoop]: trace histogram [51, 50, 50, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:40,754 INFO L414 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:40,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1365963277, now seen corresponding path program 50 times [2018-07-23 23:31:40,754 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:40,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:40,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:40,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:31:40,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:41,825 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:41,825 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:41,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:31:41,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:31:41,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:41,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:41,967 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:41,967 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-07-23 23:31:41,968 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 23:31:41,968 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 23:31:41,969 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 23:31:41,969 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 53 states. [2018-07-23 23:31:42,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:42,237 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-07-23 23:31:42,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-23 23:31:42,237 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 157 [2018-07-23 23:31:42,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:42,239 INFO L225 Difference]: With dead ends: 166 [2018-07-23 23:31:42,239 INFO L226 Difference]: Without dead ends: 162 [2018-07-23 23:31:42,239 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 23:31:42,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-07-23 23:31:42,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-07-23 23:31:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-07-23 23:31:42,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-07-23 23:31:42,243 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 157 [2018-07-23 23:31:42,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:42,243 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-07-23 23:31:42,243 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 23:31:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-07-23 23:31:42,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-07-23 23:31:42,244 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:42,244 INFO L353 BasicCegarLoop]: trace histogram [52, 51, 51, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:42,244 INFO L414 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:42,244 INFO L82 PathProgramCache]: Analyzing trace with hash 244046667, now seen corresponding path program 51 times [2018-07-23 23:31:42,244 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:42,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:42,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:42,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:42,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:43,608 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:43,608 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:43,616 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:31:44,187 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-07-23 23:31:44,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:44,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:44,261 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:44,261 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-07-23 23:31:44,262 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 23:31:44,262 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 23:31:44,262 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 23:31:44,263 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 54 states. [2018-07-23 23:31:44,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:44,828 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-07-23 23:31:44,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 23:31:44,828 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 160 [2018-07-23 23:31:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:44,830 INFO L225 Difference]: With dead ends: 169 [2018-07-23 23:31:44,830 INFO L226 Difference]: Without dead ends: 165 [2018-07-23 23:31:44,830 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 23:31:44,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-07-23 23:31:44,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2018-07-23 23:31:44,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-07-23 23:31:44,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-07-23 23:31:44,833 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 160 [2018-07-23 23:31:44,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:44,834 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-07-23 23:31:44,834 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 23:31:44,834 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-07-23 23:31:44,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-07-23 23:31:44,835 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:44,835 INFO L353 BasicCegarLoop]: trace histogram [53, 52, 52, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:44,835 INFO L414 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:44,835 INFO L82 PathProgramCache]: Analyzing trace with hash 661815629, now seen corresponding path program 52 times [2018-07-23 23:31:44,835 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:44,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:44,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:44,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:44,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:46,312 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:46,312 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:46,319 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:31:46,373 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:31:46,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:46,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:46,440 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:46,440 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-07-23 23:31:46,440 INFO L450 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-23 23:31:46,441 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-23 23:31:46,441 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 23:31:46,442 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 55 states. [2018-07-23 23:31:46,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:46,949 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-07-23 23:31:46,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-23 23:31:46,949 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2018-07-23 23:31:46,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:46,951 INFO L225 Difference]: With dead ends: 172 [2018-07-23 23:31:46,951 INFO L226 Difference]: Without dead ends: 168 [2018-07-23 23:31:46,952 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 23:31:46,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-07-23 23:31:46,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2018-07-23 23:31:46,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-07-23 23:31:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-07-23 23:31:46,956 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 163 [2018-07-23 23:31:46,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:46,956 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-07-23 23:31:46,956 INFO L472 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-23 23:31:46,956 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-07-23 23:31:46,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-07-23 23:31:46,957 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:46,957 INFO L353 BasicCegarLoop]: trace histogram [54, 53, 53, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:46,957 INFO L414 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:46,957 INFO L82 PathProgramCache]: Analyzing trace with hash -398261237, now seen corresponding path program 53 times [2018-07-23 23:31:46,958 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:46,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:46,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:46,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:46,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:48,207 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:48,207 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:48,213 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:31:49,572 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-07-23 23:31:49,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:49,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:49,657 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:49,657 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-07-23 23:31:49,658 INFO L450 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-23 23:31:49,658 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-23 23:31:49,658 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 23:31:49,659 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 56 states. [2018-07-23 23:31:49,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:49,937 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-07-23 23:31:49,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-23 23:31:49,937 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 166 [2018-07-23 23:31:49,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:49,939 INFO L225 Difference]: With dead ends: 175 [2018-07-23 23:31:49,939 INFO L226 Difference]: Without dead ends: 171 [2018-07-23 23:31:49,939 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 23:31:49,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-07-23 23:31:49,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2018-07-23 23:31:49,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-07-23 23:31:49,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-07-23 23:31:49,943 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 166 [2018-07-23 23:31:49,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:49,943 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-07-23 23:31:49,944 INFO L472 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-23 23:31:49,944 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-07-23 23:31:49,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-07-23 23:31:49,945 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:49,945 INFO L353 BasicCegarLoop]: trace histogram [55, 54, 54, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:49,945 INFO L414 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:49,945 INFO L82 PathProgramCache]: Analyzing trace with hash -253648755, now seen corresponding path program 54 times [2018-07-23 23:31:49,945 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:49,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:49,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:49,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:49,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:51,270 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:51,270 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:51,279 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:31:51,775 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-07-23 23:31:51,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:51,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:51,830 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:51,830 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-07-23 23:31:51,830 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-23 23:31:51,831 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-23 23:31:51,831 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 23:31:51,832 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 57 states. [2018-07-23 23:31:52,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:52,086 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-07-23 23:31:52,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-07-23 23:31:52,086 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 169 [2018-07-23 23:31:52,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:52,087 INFO L225 Difference]: With dead ends: 178 [2018-07-23 23:31:52,087 INFO L226 Difference]: Without dead ends: 174 [2018-07-23 23:31:52,088 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 23:31:52,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-07-23 23:31:52,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2018-07-23 23:31:52,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-07-23 23:31:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-07-23 23:31:52,090 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 169 [2018-07-23 23:31:52,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:52,090 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-07-23 23:31:52,091 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-23 23:31:52,091 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-07-23 23:31:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-07-23 23:31:52,092 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:52,092 INFO L353 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:52,093 INFO L414 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:52,093 INFO L82 PathProgramCache]: Analyzing trace with hash 44604619, now seen corresponding path program 55 times [2018-07-23 23:31:52,093 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:52,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:52,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:52,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:52,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:53,292 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:53,292 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:53,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:31:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:53,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:53,426 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:53,426 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-07-23 23:31:53,427 INFO L450 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-23 23:31:53,427 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-23 23:31:53,427 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 23:31:53,428 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 58 states. [2018-07-23 23:31:54,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:54,317 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-07-23 23:31:54,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-23 23:31:54,317 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 172 [2018-07-23 23:31:54,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:54,318 INFO L225 Difference]: With dead ends: 181 [2018-07-23 23:31:54,318 INFO L226 Difference]: Without dead ends: 177 [2018-07-23 23:31:54,319 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 23:31:54,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-07-23 23:31:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2018-07-23 23:31:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-07-23 23:31:54,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-07-23 23:31:54,324 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 172 [2018-07-23 23:31:54,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:54,324 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-07-23 23:31:54,324 INFO L472 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-23 23:31:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-07-23 23:31:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-07-23 23:31:54,325 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:54,325 INFO L353 BasicCegarLoop]: trace histogram [57, 56, 56, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:54,325 INFO L414 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:54,326 INFO L82 PathProgramCache]: Analyzing trace with hash -976465971, now seen corresponding path program 56 times [2018-07-23 23:31:54,326 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:54,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:54,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:54,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:31:54,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:55,619 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:55,619 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:55,626 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:31:55,688 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:31:55,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:55,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:55,753 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:55,754 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-07-23 23:31:55,754 INFO L450 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-07-23 23:31:55,754 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-07-23 23:31:55,754 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 23:31:55,755 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 59 states. [2018-07-23 23:31:55,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:55,959 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2018-07-23 23:31:55,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 23:31:55,959 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 175 [2018-07-23 23:31:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:55,961 INFO L225 Difference]: With dead ends: 184 [2018-07-23 23:31:55,961 INFO L226 Difference]: Without dead ends: 180 [2018-07-23 23:31:55,961 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 23:31:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-07-23 23:31:55,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2018-07-23 23:31:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-07-23 23:31:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-07-23 23:31:55,965 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 175 [2018-07-23 23:31:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:55,966 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-07-23 23:31:55,966 INFO L472 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-07-23 23:31:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-07-23 23:31:55,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-07-23 23:31:55,967 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:55,967 INFO L353 BasicCegarLoop]: trace histogram [58, 57, 57, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:55,967 INFO L414 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1562944907, now seen corresponding path program 57 times [2018-07-23 23:31:55,967 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:55,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:55,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:55,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:55,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:31:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:57,267 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:31:57,267 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:31:57,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:31:58,234 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-07-23 23:31:58,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:31:58,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:31:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:31:58,296 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:31:58,297 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-07-23 23:31:58,297 INFO L450 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-23 23:31:58,297 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-23 23:31:58,298 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 23:31:58,298 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 60 states. [2018-07-23 23:31:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:31:58,519 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-07-23 23:31:58,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-23 23:31:58,520 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 178 [2018-07-23 23:31:58,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:31:58,521 INFO L225 Difference]: With dead ends: 187 [2018-07-23 23:31:58,521 INFO L226 Difference]: Without dead ends: 183 [2018-07-23 23:31:58,522 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 23:31:58,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-07-23 23:31:58,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2018-07-23 23:31:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-07-23 23:31:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-07-23 23:31:58,526 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 178 [2018-07-23 23:31:58,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:31:58,527 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-07-23 23:31:58,527 INFO L472 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-23 23:31:58,527 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-07-23 23:31:58,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-07-23 23:31:58,528 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:31:58,528 INFO L353 BasicCegarLoop]: trace histogram [59, 58, 58, 1, 1, 1, 1, 1, 1] [2018-07-23 23:31:58,528 INFO L414 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:31:58,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1598459661, now seen corresponding path program 58 times [2018-07-23 23:31:58,529 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:31:58,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:31:58,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:58,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:31:58,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:31:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:00,157 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:00,157 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:00,167 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:32:00,225 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:32:00,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:32:00,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:00,298 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:00,298 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-07-23 23:32:00,299 INFO L450 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-23 23:32:00,300 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-23 23:32:00,301 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 23:32:00,301 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 61 states. [2018-07-23 23:32:00,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:00,539 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2018-07-23 23:32:00,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-07-23 23:32:00,539 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 181 [2018-07-23 23:32:00,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:00,540 INFO L225 Difference]: With dead ends: 190 [2018-07-23 23:32:00,540 INFO L226 Difference]: Without dead ends: 186 [2018-07-23 23:32:00,541 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 23:32:00,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-07-23 23:32:00,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-07-23 23:32:00,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-07-23 23:32:00,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-07-23 23:32:00,544 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 181 [2018-07-23 23:32:00,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:00,544 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-07-23 23:32:00,544 INFO L472 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-23 23:32:00,544 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-07-23 23:32:00,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-07-23 23:32:00,545 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:00,545 INFO L353 BasicCegarLoop]: trace histogram [60, 59, 59, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:00,546 INFO L414 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:00,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1238426037, now seen corresponding path program 59 times [2018-07-23 23:32:00,546 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:00,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:00,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:00,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:32:00,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:02,111 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:02,111 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:02,119 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:32:04,088 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-07-23 23:32:04,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:32:04,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:04,169 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:04,169 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-07-23 23:32:04,170 INFO L450 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-23 23:32:04,171 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-23 23:32:04,171 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 23:32:04,171 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 62 states. [2018-07-23 23:32:04,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:04,487 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-07-23 23:32:04,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 23:32:04,488 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 184 [2018-07-23 23:32:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:04,489 INFO L225 Difference]: With dead ends: 193 [2018-07-23 23:32:04,489 INFO L226 Difference]: Without dead ends: 189 [2018-07-23 23:32:04,490 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 23:32:04,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-07-23 23:32:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2018-07-23 23:32:04,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-07-23 23:32:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-07-23 23:32:04,493 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 184 [2018-07-23 23:32:04,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:04,494 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-07-23 23:32:04,494 INFO L472 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-23 23:32:04,494 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-07-23 23:32:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-07-23 23:32:04,495 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:04,495 INFO L353 BasicCegarLoop]: trace histogram [61, 60, 60, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:04,495 INFO L414 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:04,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1466195533, now seen corresponding path program 60 times [2018-07-23 23:32:04,495 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:04,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:04,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:04,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:32:04,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:05,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:05,983 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:05,983 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:05,990 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:32:06,628 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-07-23 23:32:06,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:32:06,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:06,699 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:06,700 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-07-23 23:32:06,700 INFO L450 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-23 23:32:06,700 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-23 23:32:06,701 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 23:32:06,701 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 63 states. [2018-07-23 23:32:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:06,926 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2018-07-23 23:32:06,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-23 23:32:06,927 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 187 [2018-07-23 23:32:06,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:06,928 INFO L225 Difference]: With dead ends: 196 [2018-07-23 23:32:06,928 INFO L226 Difference]: Without dead ends: 192 [2018-07-23 23:32:06,929 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 23:32:06,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-07-23 23:32:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2018-07-23 23:32:06,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-07-23 23:32:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-07-23 23:32:06,933 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 187 [2018-07-23 23:32:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:06,933 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-07-23 23:32:06,933 INFO L472 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-23 23:32:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-07-23 23:32:06,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-07-23 23:32:06,934 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:06,934 INFO L353 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:06,934 INFO L414 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:06,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1260914443, now seen corresponding path program 61 times [2018-07-23 23:32:06,934 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:06,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:06,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:06,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:32:06,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:08,572 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:08,572 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:08,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:32:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:08,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:08,720 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:08,721 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-07-23 23:32:08,721 INFO L450 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-23 23:32:08,722 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-23 23:32:08,722 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 23:32:08,722 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 64 states. [2018-07-23 23:32:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:09,410 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-07-23 23:32:09,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 23:32:09,410 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 190 [2018-07-23 23:32:09,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:09,411 INFO L225 Difference]: With dead ends: 199 [2018-07-23 23:32:09,411 INFO L226 Difference]: Without dead ends: 195 [2018-07-23 23:32:09,412 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 23:32:09,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-07-23 23:32:09,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2018-07-23 23:32:09,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-07-23 23:32:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-07-23 23:32:09,416 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 190 [2018-07-23 23:32:09,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:09,416 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-07-23 23:32:09,416 INFO L472 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-23 23:32:09,416 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-07-23 23:32:09,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-07-23 23:32:09,417 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:09,417 INFO L353 BasicCegarLoop]: trace histogram [63, 62, 62, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:09,418 INFO L414 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:09,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1765391757, now seen corresponding path program 62 times [2018-07-23 23:32:09,418 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:09,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:09,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:09,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:32:09,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:12,532 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:12,532 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:12,540 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:32:12,605 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:32:12,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:32:12,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:12,668 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:12,668 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-07-23 23:32:12,668 INFO L450 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-23 23:32:12,669 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-23 23:32:12,669 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 23:32:12,669 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 65 states. [2018-07-23 23:32:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:12,951 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-07-23 23:32:12,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-23 23:32:12,952 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 193 [2018-07-23 23:32:12,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:12,952 INFO L225 Difference]: With dead ends: 202 [2018-07-23 23:32:12,953 INFO L226 Difference]: Without dead ends: 198 [2018-07-23 23:32:12,953 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 23:32:12,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-07-23 23:32:12,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2018-07-23 23:32:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-07-23 23:32:12,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-07-23 23:32:12,957 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 193 [2018-07-23 23:32:12,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:12,958 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-07-23 23:32:12,958 INFO L472 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-23 23:32:12,958 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-07-23 23:32:12,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-07-23 23:32:12,959 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:12,959 INFO L353 BasicCegarLoop]: trace histogram [64, 63, 63, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:12,959 INFO L414 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:12,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1736482869, now seen corresponding path program 63 times [2018-07-23 23:32:12,960 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:12,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:12,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:12,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:32:12,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:14,545 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:14,545 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:14,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:32:15,682 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-07-23 23:32:15,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:32:15,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:15,742 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:15,742 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-07-23 23:32:15,743 INFO L450 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-23 23:32:15,743 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-23 23:32:15,743 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 23:32:15,744 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 66 states. [2018-07-23 23:32:15,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:15,981 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-07-23 23:32:15,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-23 23:32:15,981 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 196 [2018-07-23 23:32:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:15,982 INFO L225 Difference]: With dead ends: 205 [2018-07-23 23:32:15,982 INFO L226 Difference]: Without dead ends: 201 [2018-07-23 23:32:15,982 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 23:32:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-07-23 23:32:15,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2018-07-23 23:32:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-07-23 23:32:15,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2018-07-23 23:32:15,987 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 196 [2018-07-23 23:32:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:15,987 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2018-07-23 23:32:15,987 INFO L472 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-23 23:32:15,987 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2018-07-23 23:32:15,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-07-23 23:32:15,988 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:15,988 INFO L353 BasicCegarLoop]: trace histogram [65, 64, 64, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:15,989 INFO L414 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:15,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1327846195, now seen corresponding path program 64 times [2018-07-23 23:32:15,989 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:15,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:15,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:15,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:32:15,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:17,595 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:17,595 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:17,608 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:32:17,680 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:32:17,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:32:17,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:17,738 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:17,738 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-07-23 23:32:17,738 INFO L450 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-07-23 23:32:17,739 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-07-23 23:32:17,739 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 23:32:17,739 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand 67 states. [2018-07-23 23:32:17,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:17,972 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2018-07-23 23:32:17,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-07-23 23:32:17,972 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 199 [2018-07-23 23:32:17,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:17,974 INFO L225 Difference]: With dead ends: 208 [2018-07-23 23:32:17,974 INFO L226 Difference]: Without dead ends: 204 [2018-07-23 23:32:17,975 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 23:32:17,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-07-23 23:32:17,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2018-07-23 23:32:17,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-07-23 23:32:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-07-23 23:32:17,978 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 199 [2018-07-23 23:32:17,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:17,978 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-07-23 23:32:17,978 INFO L472 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-07-23 23:32:17,978 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-07-23 23:32:17,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-07-23 23:32:17,979 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:17,979 INFO L353 BasicCegarLoop]: trace histogram [66, 65, 65, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:17,979 INFO L414 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:17,980 INFO L82 PathProgramCache]: Analyzing trace with hash 429992075, now seen corresponding path program 65 times [2018-07-23 23:32:17,980 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:17,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:17,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:17,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:32:17,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:19,599 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:19,599 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:19,607 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:32:22,504 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-07-23 23:32:22,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:32:22,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:22,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:22,602 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:22,603 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-07-23 23:32:22,603 INFO L450 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-23 23:32:22,603 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-23 23:32:22,603 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 23:32:22,604 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 68 states. [2018-07-23 23:32:22,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:22,905 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-07-23 23:32:22,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-23 23:32:22,905 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 202 [2018-07-23 23:32:22,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:22,906 INFO L225 Difference]: With dead ends: 211 [2018-07-23 23:32:22,907 INFO L226 Difference]: Without dead ends: 207 [2018-07-23 23:32:22,907 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 23:32:22,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-07-23 23:32:22,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2018-07-23 23:32:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-07-23 23:32:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2018-07-23 23:32:22,911 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 202 [2018-07-23 23:32:22,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:22,911 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2018-07-23 23:32:22,911 INFO L472 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-23 23:32:22,911 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2018-07-23 23:32:22,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-07-23 23:32:22,912 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:22,912 INFO L353 BasicCegarLoop]: trace histogram [67, 66, 66, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:22,912 INFO L414 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:22,912 INFO L82 PathProgramCache]: Analyzing trace with hash -346346483, now seen corresponding path program 66 times [2018-07-23 23:32:22,912 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:22,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:22,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:22,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:32:22,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:24,542 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:24,542 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:24,549 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:32:25,394 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-07-23 23:32:25,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:32:25,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:25,454 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:25,454 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-07-23 23:32:25,455 INFO L450 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-23 23:32:25,455 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-23 23:32:25,455 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 23:32:25,456 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 69 states. [2018-07-23 23:32:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:25,682 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2018-07-23 23:32:25,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-23 23:32:25,682 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 205 [2018-07-23 23:32:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:25,684 INFO L225 Difference]: With dead ends: 214 [2018-07-23 23:32:25,684 INFO L226 Difference]: Without dead ends: 210 [2018-07-23 23:32:25,685 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 23:32:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-07-23 23:32:25,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2018-07-23 23:32:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-07-23 23:32:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-07-23 23:32:25,688 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 205 [2018-07-23 23:32:25,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:25,688 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-07-23 23:32:25,688 INFO L472 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-23 23:32:25,688 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-07-23 23:32:25,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-07-23 23:32:25,689 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:25,689 INFO L353 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:25,689 INFO L414 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:25,689 INFO L82 PathProgramCache]: Analyzing trace with hash 150561099, now seen corresponding path program 67 times [2018-07-23 23:32:25,689 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:25,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:25,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:25,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:32:25,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:27,446 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:27,446 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:27,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:32:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:27,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:27,607 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:27,607 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-07-23 23:32:27,607 INFO L450 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-23 23:32:27,608 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-23 23:32:27,608 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 23:32:27,608 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 70 states. [2018-07-23 23:32:27,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:27,950 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-07-23 23:32:27,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-23 23:32:27,950 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 208 [2018-07-23 23:32:27,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:27,951 INFO L225 Difference]: With dead ends: 217 [2018-07-23 23:32:27,951 INFO L226 Difference]: Without dead ends: 213 [2018-07-23 23:32:27,951 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 23:32:27,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-07-23 23:32:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2018-07-23 23:32:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-07-23 23:32:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2018-07-23 23:32:27,954 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 208 [2018-07-23 23:32:27,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:27,954 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2018-07-23 23:32:27,954 INFO L472 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-23 23:32:27,954 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2018-07-23 23:32:27,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-07-23 23:32:27,955 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:27,955 INFO L353 BasicCegarLoop]: trace histogram [69, 68, 68, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:27,956 INFO L414 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:27,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1227932851, now seen corresponding path program 68 times [2018-07-23 23:32:27,956 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:27,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:27,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:27,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:32:27,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:29,726 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:29,726 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:29,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:32:29,806 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:32:29,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:32:29,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:29,868 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:29,868 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-07-23 23:32:29,868 INFO L450 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-07-23 23:32:29,869 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-07-23 23:32:29,869 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 23:32:29,870 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 71 states. [2018-07-23 23:32:30,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:30,256 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2018-07-23 23:32:30,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-23 23:32:30,256 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 211 [2018-07-23 23:32:30,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:30,257 INFO L225 Difference]: With dead ends: 220 [2018-07-23 23:32:30,257 INFO L226 Difference]: Without dead ends: 216 [2018-07-23 23:32:30,258 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 23:32:30,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-07-23 23:32:30,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2018-07-23 23:32:30,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-07-23 23:32:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-07-23 23:32:30,261 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 211 [2018-07-23 23:32:30,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:30,261 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-07-23 23:32:30,261 INFO L472 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-07-23 23:32:30,261 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-07-23 23:32:30,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-07-23 23:32:30,262 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:30,263 INFO L353 BasicCegarLoop]: trace histogram [70, 69, 69, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:30,263 INFO L414 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:30,263 INFO L82 PathProgramCache]: Analyzing trace with hash 536087051, now seen corresponding path program 69 times [2018-07-23 23:32:30,263 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:30,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:30,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:30,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:32:30,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:32,084 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:32,084 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:32,091 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:32:33,677 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-07-23 23:32:33,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:32:33,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:33,768 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:33,769 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-07-23 23:32:33,769 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-23 23:32:33,770 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-23 23:32:33,770 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 23:32:33,770 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 72 states. [2018-07-23 23:32:34,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:34,226 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-07-23 23:32:34,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 23:32:34,226 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 214 [2018-07-23 23:32:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:34,228 INFO L225 Difference]: With dead ends: 223 [2018-07-23 23:32:34,228 INFO L226 Difference]: Without dead ends: 219 [2018-07-23 23:32:34,229 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 23:32:34,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-07-23 23:32:34,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2018-07-23 23:32:34,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-07-23 23:32:34,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-07-23 23:32:34,232 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 214 [2018-07-23 23:32:34,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:34,233 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-07-23 23:32:34,233 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-23 23:32:34,233 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-07-23 23:32:34,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-07-23 23:32:34,233 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:34,234 INFO L353 BasicCegarLoop]: trace histogram [71, 70, 70, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:34,234 INFO L414 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:34,234 INFO L82 PathProgramCache]: Analyzing trace with hash -766846323, now seen corresponding path program 70 times [2018-07-23 23:32:34,234 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:34,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:34,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:34,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:32:34,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:36,337 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:36,338 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:36,344 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:32:36,418 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:32:36,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:32:36,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:36,504 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:36,504 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-07-23 23:32:36,505 INFO L450 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-07-23 23:32:36,505 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-07-23 23:32:36,506 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 23:32:36,506 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 73 states. [2018-07-23 23:32:36,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:36,859 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2018-07-23 23:32:36,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-07-23 23:32:36,859 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 217 [2018-07-23 23:32:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:36,860 INFO L225 Difference]: With dead ends: 226 [2018-07-23 23:32:36,860 INFO L226 Difference]: Without dead ends: 222 [2018-07-23 23:32:36,861 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 23:32:36,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-07-23 23:32:36,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2018-07-23 23:32:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-07-23 23:32:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-07-23 23:32:36,864 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 217 [2018-07-23 23:32:36,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:36,864 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-07-23 23:32:36,864 INFO L472 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-07-23 23:32:36,864 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-07-23 23:32:36,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-07-23 23:32:36,865 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:36,866 INFO L353 BasicCegarLoop]: trace histogram [72, 71, 71, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:36,866 INFO L414 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:36,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1459430091, now seen corresponding path program 71 times [2018-07-23 23:32:36,866 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:36,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:36,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:36,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:32:36,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:38,758 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:38,759 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:38,767 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:32:42,745 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-07-23 23:32:42,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:32:42,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:42,820 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:42,820 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-07-23 23:32:42,821 INFO L450 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-23 23:32:42,821 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-23 23:32:42,821 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 23:32:42,821 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 74 states. [2018-07-23 23:32:43,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:43,114 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-07-23 23:32:43,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-23 23:32:43,115 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 220 [2018-07-23 23:32:43,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:43,116 INFO L225 Difference]: With dead ends: 229 [2018-07-23 23:32:43,116 INFO L226 Difference]: Without dead ends: 225 [2018-07-23 23:32:43,117 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 23:32:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-07-23 23:32:43,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2018-07-23 23:32:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-07-23 23:32:43,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 224 transitions. [2018-07-23 23:32:43,120 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 224 transitions. Word has length 220 [2018-07-23 23:32:43,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:43,120 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 224 transitions. [2018-07-23 23:32:43,120 INFO L472 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-23 23:32:43,120 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 224 transitions. [2018-07-23 23:32:43,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-07-23 23:32:43,121 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:43,121 INFO L353 BasicCegarLoop]: trace histogram [73, 72, 72, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:43,121 INFO L414 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:43,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1575094733, now seen corresponding path program 72 times [2018-07-23 23:32:43,121 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:43,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:43,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:43,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:32:43,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:45,304 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:45,304 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:45,310 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:32:46,443 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-07-23 23:32:46,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:32:46,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:46,510 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:46,511 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-07-23 23:32:46,511 INFO L450 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-23 23:32:46,512 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-23 23:32:46,512 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 23:32:46,512 INFO L87 Difference]: Start difference. First operand 224 states and 224 transitions. Second operand 75 states. [2018-07-23 23:32:46,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:46,877 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2018-07-23 23:32:46,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-23 23:32:46,877 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 223 [2018-07-23 23:32:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:46,878 INFO L225 Difference]: With dead ends: 232 [2018-07-23 23:32:46,878 INFO L226 Difference]: Without dead ends: 228 [2018-07-23 23:32:46,879 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 23:32:46,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-07-23 23:32:46,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2018-07-23 23:32:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-07-23 23:32:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-07-23 23:32:46,882 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 223 [2018-07-23 23:32:46,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:46,882 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-07-23 23:32:46,882 INFO L472 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-23 23:32:46,882 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-07-23 23:32:46,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-07-23 23:32:46,883 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:46,884 INFO L353 BasicCegarLoop]: trace histogram [74, 73, 73, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:46,884 INFO L414 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:46,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1518294133, now seen corresponding path program 73 times [2018-07-23 23:32:46,884 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:46,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:46,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:46,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:32:46,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:48,899 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:48,899 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:48,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:32:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:48,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:49,046 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:49,046 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-07-23 23:32:49,047 INFO L450 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-23 23:32:49,047 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-23 23:32:49,048 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 23:32:49,048 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 76 states. [2018-07-23 23:32:49,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:49,350 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-07-23 23:32:49,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-23 23:32:49,350 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 226 [2018-07-23 23:32:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:49,352 INFO L225 Difference]: With dead ends: 235 [2018-07-23 23:32:49,352 INFO L226 Difference]: Without dead ends: 231 [2018-07-23 23:32:49,352 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 23:32:49,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-07-23 23:32:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2018-07-23 23:32:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-07-23 23:32:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2018-07-23 23:32:49,357 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 226 [2018-07-23 23:32:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:49,358 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2018-07-23 23:32:49,358 INFO L472 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-23 23:32:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2018-07-23 23:32:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-07-23 23:32:49,359 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:49,359 INFO L353 BasicCegarLoop]: trace histogram [75, 74, 74, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:49,359 INFO L414 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:49,359 INFO L82 PathProgramCache]: Analyzing trace with hash 447269133, now seen corresponding path program 74 times [2018-07-23 23:32:49,359 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:49,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:49,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:49,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:32:49,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:51,813 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:51,813 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:51,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:32:51,899 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:32:51,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:32:51,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:51,963 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:51,963 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-07-23 23:32:51,964 INFO L450 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-07-23 23:32:51,964 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-07-23 23:32:51,964 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 23:32:51,965 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand 77 states. [2018-07-23 23:32:52,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:52,374 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2018-07-23 23:32:52,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-07-23 23:32:52,374 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 229 [2018-07-23 23:32:52,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:52,375 INFO L225 Difference]: With dead ends: 238 [2018-07-23 23:32:52,375 INFO L226 Difference]: Without dead ends: 234 [2018-07-23 23:32:52,375 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 23:32:52,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-07-23 23:32:52,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2018-07-23 23:32:52,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-07-23 23:32:52,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-07-23 23:32:52,380 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 229 [2018-07-23 23:32:52,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:52,380 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-07-23 23:32:52,380 INFO L472 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-07-23 23:32:52,380 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-07-23 23:32:52,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-07-23 23:32:52,381 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:52,381 INFO L353 BasicCegarLoop]: trace histogram [76, 75, 75, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:52,381 INFO L414 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:52,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1041587125, now seen corresponding path program 75 times [2018-07-23 23:32:52,382 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:52,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:52,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:52,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:32:52,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:54,481 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:54,481 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:54,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:32:56,596 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-07-23 23:32:56,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:32:56,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:56,694 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:56,694 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-07-23 23:32:56,695 INFO L450 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-23 23:32:56,695 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-23 23:32:56,695 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 23:32:56,695 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 78 states. [2018-07-23 23:32:57,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:57,098 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-07-23 23:32:57,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-23 23:32:57,099 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 232 [2018-07-23 23:32:57,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:57,100 INFO L225 Difference]: With dead ends: 241 [2018-07-23 23:32:57,100 INFO L226 Difference]: Without dead ends: 237 [2018-07-23 23:32:57,100 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 23:32:57,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-07-23 23:32:57,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2018-07-23 23:32:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-07-23 23:32:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2018-07-23 23:32:57,103 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 232 [2018-07-23 23:32:57,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:57,103 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2018-07-23 23:32:57,104 INFO L472 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-23 23:32:57,104 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2018-07-23 23:32:57,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-07-23 23:32:57,104 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:57,105 INFO L353 BasicCegarLoop]: trace histogram [77, 76, 76, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:57,105 INFO L414 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:57,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1431103411, now seen corresponding path program 76 times [2018-07-23 23:32:57,105 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:57,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:57,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:57,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:32:57,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:32:59,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:59,238 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:32:59,239 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:32:59,246 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:32:59,323 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:32:59,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:32:59,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:32:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:32:59,392 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:32:59,392 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-07-23 23:32:59,393 INFO L450 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-07-23 23:32:59,393 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-07-23 23:32:59,393 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 23:32:59,394 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 79 states. [2018-07-23 23:32:59,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:32:59,787 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2018-07-23 23:32:59,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-07-23 23:32:59,787 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 235 [2018-07-23 23:32:59,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:32:59,788 INFO L225 Difference]: With dead ends: 244 [2018-07-23 23:32:59,788 INFO L226 Difference]: Without dead ends: 240 [2018-07-23 23:32:59,789 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 23:32:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-07-23 23:32:59,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2018-07-23 23:32:59,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-07-23 23:32:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-07-23 23:32:59,791 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 235 [2018-07-23 23:32:59,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:32:59,792 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-07-23 23:32:59,792 INFO L472 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-07-23 23:32:59,792 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-07-23 23:32:59,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-07-23 23:32:59,793 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:32:59,793 INFO L353 BasicCegarLoop]: trace histogram [78, 77, 77, 1, 1, 1, 1, 1, 1] [2018-07-23 23:32:59,793 INFO L414 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:32:59,793 INFO L82 PathProgramCache]: Analyzing trace with hash -509145845, now seen corresponding path program 77 times [2018-07-23 23:32:59,793 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:32:59,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:32:59,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:59,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:32:59,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:32:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:02,111 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:33:02,111 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:33:02,118 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:33:07,783 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-07-23 23:33:07,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:33:07,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:33:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:07,857 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:33:07,858 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-07-23 23:33:07,858 INFO L450 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-23 23:33:07,859 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-23 23:33:07,859 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 23:33:07,859 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 80 states. [2018-07-23 23:33:08,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:08,290 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-07-23 23:33:08,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-23 23:33:08,291 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 238 [2018-07-23 23:33:08,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:08,292 INFO L225 Difference]: With dead ends: 247 [2018-07-23 23:33:08,292 INFO L226 Difference]: Without dead ends: 243 [2018-07-23 23:33:08,292 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 23:33:08,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-07-23 23:33:08,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2018-07-23 23:33:08,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-07-23 23:33:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2018-07-23 23:33:08,296 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 238 [2018-07-23 23:33:08,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:08,296 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2018-07-23 23:33:08,296 INFO L472 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-23 23:33:08,296 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2018-07-23 23:33:08,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-07-23 23:33:08,297 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:08,298 INFO L353 BasicCegarLoop]: trace histogram [79, 78, 78, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:08,298 INFO L414 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:08,298 INFO L82 PathProgramCache]: Analyzing trace with hash -787155059, now seen corresponding path program 78 times [2018-07-23 23:33:08,298 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:08,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:08,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:08,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:33:08,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:10,541 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:33:10,541 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:33:10,549 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:33:12,195 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-07-23 23:33:12,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:33:12,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:33:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:12,267 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:33:12,267 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-07-23 23:33:12,267 INFO L450 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-23 23:33:12,268 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-23 23:33:12,268 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 23:33:12,268 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 81 states. [2018-07-23 23:33:12,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:12,688 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2018-07-23 23:33:12,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-07-23 23:33:12,688 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 241 [2018-07-23 23:33:12,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:12,689 INFO L225 Difference]: With dead ends: 250 [2018-07-23 23:33:12,689 INFO L226 Difference]: Without dead ends: 246 [2018-07-23 23:33:12,689 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 23:33:12,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-07-23 23:33:12,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2018-07-23 23:33:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-07-23 23:33:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2018-07-23 23:33:12,692 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 241 [2018-07-23 23:33:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:12,692 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2018-07-23 23:33:12,693 INFO L472 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-23 23:33:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2018-07-23 23:33:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-07-23 23:33:12,693 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:12,693 INFO L353 BasicCegarLoop]: trace histogram [80, 79, 79, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:12,694 INFO L414 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:12,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2032264651, now seen corresponding path program 79 times [2018-07-23 23:33:12,694 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:12,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:12,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:12,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:33:12,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:14,960 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:33:14,960 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:33:14,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:33:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:15,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:33:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:15,121 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:33:15,122 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-07-23 23:33:15,122 INFO L450 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-23 23:33:15,122 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-23 23:33:15,123 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 23:33:15,123 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 82 states. [2018-07-23 23:33:15,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:15,411 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-07-23 23:33:15,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-23 23:33:15,411 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 244 [2018-07-23 23:33:15,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:15,413 INFO L225 Difference]: With dead ends: 253 [2018-07-23 23:33:15,413 INFO L226 Difference]: Without dead ends: 249 [2018-07-23 23:33:15,414 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 23:33:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-07-23 23:33:15,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2018-07-23 23:33:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-07-23 23:33:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2018-07-23 23:33:15,417 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 244 [2018-07-23 23:33:15,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:15,418 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2018-07-23 23:33:15,418 INFO L472 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-23 23:33:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2018-07-23 23:33:15,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-07-23 23:33:15,418 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:15,419 INFO L353 BasicCegarLoop]: trace histogram [81, 80, 80, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:15,419 INFO L414 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:15,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1310562611, now seen corresponding path program 80 times [2018-07-23 23:33:15,419 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:15,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:15,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:15,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:33:15,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:18,030 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:33:18,031 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:33:18,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:33:18,119 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:33:18,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:33:18,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:33:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:18,203 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:33:18,204 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-07-23 23:33:18,204 INFO L450 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-07-23 23:33:18,204 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-07-23 23:33:18,205 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 23:33:18,205 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 83 states. [2018-07-23 23:33:18,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:18,658 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2018-07-23 23:33:18,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-07-23 23:33:18,658 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 247 [2018-07-23 23:33:18,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:18,659 INFO L225 Difference]: With dead ends: 256 [2018-07-23 23:33:18,660 INFO L226 Difference]: Without dead ends: 252 [2018-07-23 23:33:18,660 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 23:33:18,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-07-23 23:33:18,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2018-07-23 23:33:18,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-07-23 23:33:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-07-23 23:33:18,663 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 247 [2018-07-23 23:33:18,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:18,664 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-07-23 23:33:18,664 INFO L472 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-07-23 23:33:18,664 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-07-23 23:33:18,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-07-23 23:33:18,664 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:18,665 INFO L353 BasicCegarLoop]: trace histogram [82, 81, 81, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:18,665 INFO L414 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:18,665 INFO L82 PathProgramCache]: Analyzing trace with hash -70832501, now seen corresponding path program 81 times [2018-07-23 23:33:18,665 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:18,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:18,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:18,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:33:18,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:21,032 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:33:21,032 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:33:21,042 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:33:23,801 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-07-23 23:33:23,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:33:23,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:33:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:23,874 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:33:23,874 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-07-23 23:33:23,874 INFO L450 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-23 23:33:23,875 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-23 23:33:23,875 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 23:33:23,876 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 84 states. [2018-07-23 23:33:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:24,264 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2018-07-23 23:33:24,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-23 23:33:24,264 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 250 [2018-07-23 23:33:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:24,266 INFO L225 Difference]: With dead ends: 259 [2018-07-23 23:33:24,266 INFO L226 Difference]: Without dead ends: 255 [2018-07-23 23:33:24,267 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 23:33:24,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-07-23 23:33:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2018-07-23 23:33:24,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-07-23 23:33:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 254 transitions. [2018-07-23 23:33:24,269 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 254 transitions. Word has length 250 [2018-07-23 23:33:24,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:24,270 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 254 transitions. [2018-07-23 23:33:24,270 INFO L472 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-23 23:33:24,270 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 254 transitions. [2018-07-23 23:33:24,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-07-23 23:33:24,271 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:24,271 INFO L353 BasicCegarLoop]: trace histogram [83, 82, 82, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:24,271 INFO L414 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:24,271 INFO L82 PathProgramCache]: Analyzing trace with hash 305096205, now seen corresponding path program 82 times [2018-07-23 23:33:24,271 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:24,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:24,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:24,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:33:24,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:27,063 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:33:27,063 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:33:27,071 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:33:27,157 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:33:27,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:33:27,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:33:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:27,257 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:33:27,258 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-07-23 23:33:27,258 INFO L450 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-07-23 23:33:27,259 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-07-23 23:33:27,259 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 23:33:27,259 INFO L87 Difference]: Start difference. First operand 254 states and 254 transitions. Second operand 85 states. [2018-07-23 23:33:27,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:27,573 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2018-07-23 23:33:27,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-23 23:33:27,573 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 253 [2018-07-23 23:33:27,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:27,575 INFO L225 Difference]: With dead ends: 262 [2018-07-23 23:33:27,575 INFO L226 Difference]: Without dead ends: 258 [2018-07-23 23:33:27,575 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 23:33:27,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-07-23 23:33:27,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2018-07-23 23:33:27,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-07-23 23:33:27,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2018-07-23 23:33:27,579 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 253 [2018-07-23 23:33:27,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:27,579 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2018-07-23 23:33:27,579 INFO L472 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-07-23 23:33:27,579 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2018-07-23 23:33:27,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-07-23 23:33:27,580 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:27,580 INFO L353 BasicCegarLoop]: trace histogram [84, 83, 83, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:27,580 INFO L414 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:27,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1677531317, now seen corresponding path program 83 times [2018-07-23 23:33:27,580 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:27,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:27,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:27,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:33:27,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:30,178 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:33:30,178 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:33:30,187 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:33:37,933 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-07-23 23:33:37,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:33:37,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:33:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:38,016 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:33:38,016 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-07-23 23:33:38,017 INFO L450 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-07-23 23:33:38,018 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-07-23 23:33:38,018 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 23:33:38,018 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 86 states. [2018-07-23 23:33:38,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:38,339 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-07-23 23:33:38,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-23 23:33:38,339 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 256 [2018-07-23 23:33:38,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:38,341 INFO L225 Difference]: With dead ends: 265 [2018-07-23 23:33:38,341 INFO L226 Difference]: Without dead ends: 261 [2018-07-23 23:33:38,342 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 23:33:38,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-07-23 23:33:38,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2018-07-23 23:33:38,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-07-23 23:33:38,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 260 transitions. [2018-07-23 23:33:38,345 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 260 transitions. Word has length 256 [2018-07-23 23:33:38,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:38,346 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 260 transitions. [2018-07-23 23:33:38,346 INFO L472 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-07-23 23:33:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 260 transitions. [2018-07-23 23:33:38,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-07-23 23:33:38,347 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:38,347 INFO L353 BasicCegarLoop]: trace histogram [85, 84, 84, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:38,347 INFO L414 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:38,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1743784627, now seen corresponding path program 84 times [2018-07-23 23:33:38,348 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:38,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:38,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:38,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:33:38,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:40,997 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:33:40,997 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:33:41,005 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:33:43,135 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-07-23 23:33:43,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:33:43,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:33:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:43,211 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:33:43,212 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-07-23 23:33:43,212 INFO L450 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-07-23 23:33:43,213 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-07-23 23:33:43,213 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 23:33:43,214 INFO L87 Difference]: Start difference. First operand 260 states and 260 transitions. Second operand 87 states. [2018-07-23 23:33:43,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:43,542 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2018-07-23 23:33:43,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-23 23:33:43,542 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 259 [2018-07-23 23:33:43,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:43,544 INFO L225 Difference]: With dead ends: 268 [2018-07-23 23:33:43,544 INFO L226 Difference]: Without dead ends: 264 [2018-07-23 23:33:43,545 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 23:33:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-07-23 23:33:43,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2018-07-23 23:33:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-07-23 23:33:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-07-23 23:33:43,549 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 259 [2018-07-23 23:33:43,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:43,550 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-07-23 23:33:43,550 INFO L472 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-07-23 23:33:43,550 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-07-23 23:33:43,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-07-23 23:33:43,551 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:43,551 INFO L353 BasicCegarLoop]: trace histogram [86, 85, 85, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:43,551 INFO L414 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:43,551 INFO L82 PathProgramCache]: Analyzing trace with hash 188813323, now seen corresponding path program 85 times [2018-07-23 23:33:43,551 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:43,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:43,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:43,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:33:43,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:46,229 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:33:46,229 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:33:46,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:33:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:46,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:33:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:46,405 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:33:46,405 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-07-23 23:33:46,406 INFO L450 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-07-23 23:33:46,407 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-07-23 23:33:46,407 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 23:33:46,407 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 88 states. [2018-07-23 23:33:46,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:46,870 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2018-07-23 23:33:46,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-23 23:33:46,870 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 262 [2018-07-23 23:33:46,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:46,872 INFO L225 Difference]: With dead ends: 271 [2018-07-23 23:33:46,872 INFO L226 Difference]: Without dead ends: 267 [2018-07-23 23:33:46,872 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 23:33:46,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-07-23 23:33:46,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2018-07-23 23:33:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-07-23 23:33:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 266 transitions. [2018-07-23 23:33:46,875 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 266 transitions. Word has length 262 [2018-07-23 23:33:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:46,876 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 266 transitions. [2018-07-23 23:33:46,876 INFO L472 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-07-23 23:33:46,876 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 266 transitions. [2018-07-23 23:33:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-07-23 23:33:46,876 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:46,877 INFO L353 BasicCegarLoop]: trace histogram [87, 86, 86, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:46,877 INFO L414 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:46,877 INFO L82 PathProgramCache]: Analyzing trace with hash 177738893, now seen corresponding path program 86 times [2018-07-23 23:33:46,877 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:46,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:46,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:46,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:33:46,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:49,636 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:33:49,636 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:33:49,644 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:33:49,732 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:33:49,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:33:49,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:33:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:49,811 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:33:49,811 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-07-23 23:33:49,812 INFO L450 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-07-23 23:33:49,812 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-07-23 23:33:49,813 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 23:33:49,813 INFO L87 Difference]: Start difference. First operand 266 states and 266 transitions. Second operand 89 states. [2018-07-23 23:33:50,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:50,324 INFO L93 Difference]: Finished difference Result 274 states and 274 transitions. [2018-07-23 23:33:50,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-07-23 23:33:50,325 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 265 [2018-07-23 23:33:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:50,326 INFO L225 Difference]: With dead ends: 274 [2018-07-23 23:33:50,326 INFO L226 Difference]: Without dead ends: 270 [2018-07-23 23:33:50,326 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 23:33:50,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-07-23 23:33:50,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2018-07-23 23:33:50,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-07-23 23:33:50,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2018-07-23 23:33:50,330 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 265 [2018-07-23 23:33:50,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:50,330 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2018-07-23 23:33:50,330 INFO L472 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-07-23 23:33:50,330 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2018-07-23 23:33:50,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-07-23 23:33:50,331 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:50,331 INFO L353 BasicCegarLoop]: trace histogram [88, 87, 87, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:50,331 INFO L414 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:50,331 INFO L82 PathProgramCache]: Analyzing trace with hash 971876555, now seen corresponding path program 87 times [2018-07-23 23:33:50,331 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:50,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:50,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:50,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:33:50,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:33:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:53,181 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:33:53,181 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:33:53,202 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:33:56,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-07-23 23:33:56,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:33:56,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:33:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:33:57,062 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:33:57,063 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-07-23 23:33:57,063 INFO L450 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-23 23:33:57,063 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-23 23:33:57,064 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 23:33:57,064 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand 90 states. [2018-07-23 23:33:57,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:33:57,496 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-07-23 23:33:57,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-23 23:33:57,496 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 268 [2018-07-23 23:33:57,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:33:57,497 INFO L225 Difference]: With dead ends: 277 [2018-07-23 23:33:57,497 INFO L226 Difference]: Without dead ends: 273 [2018-07-23 23:33:57,498 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 23:33:57,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-07-23 23:33:57,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2018-07-23 23:33:57,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2018-07-23 23:33:57,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 272 transitions. [2018-07-23 23:33:57,502 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 272 transitions. Word has length 268 [2018-07-23 23:33:57,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:33:57,502 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 272 transitions. [2018-07-23 23:33:57,502 INFO L472 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-23 23:33:57,502 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 272 transitions. [2018-07-23 23:33:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-07-23 23:33:57,503 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:33:57,504 INFO L353 BasicCegarLoop]: trace histogram [89, 88, 88, 1, 1, 1, 1, 1, 1] [2018-07-23 23:33:57,504 INFO L414 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:33:57,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1847868467, now seen corresponding path program 88 times [2018-07-23 23:33:57,504 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:33:57,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:33:57,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:57,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:33:57,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:33:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:00,353 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:00,353 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:00,362 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:34:00,473 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:34:00,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:00,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:00,570 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:00,570 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-07-23 23:34:00,571 INFO L450 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-07-23 23:34:00,571 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-07-23 23:34:00,572 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 23:34:00,572 INFO L87 Difference]: Start difference. First operand 272 states and 272 transitions. Second operand 91 states. [2018-07-23 23:34:01,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:01,068 INFO L93 Difference]: Finished difference Result 280 states and 280 transitions. [2018-07-23 23:34:01,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-07-23 23:34:01,069 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 271 [2018-07-23 23:34:01,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:01,071 INFO L225 Difference]: With dead ends: 280 [2018-07-23 23:34:01,071 INFO L226 Difference]: Without dead ends: 276 [2018-07-23 23:34:01,071 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 23:34:01,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-07-23 23:34:01,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2018-07-23 23:34:01,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-07-23 23:34:01,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-07-23 23:34:01,075 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 271 [2018-07-23 23:34:01,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:01,075 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-07-23 23:34:01,075 INFO L472 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-07-23 23:34:01,075 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-07-23 23:34:01,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-07-23 23:34:01,076 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:01,076 INFO L353 BasicCegarLoop]: trace histogram [90, 89, 89, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:01,077 INFO L414 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:01,077 INFO L82 PathProgramCache]: Analyzing trace with hash 393523595, now seen corresponding path program 89 times [2018-07-23 23:34:01,077 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:01,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:01,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:01,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:01,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:04,100 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:04,100 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:04,108 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:34:13,869 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-07-23 23:34:13,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:13,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:13,958 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:13,958 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-07-23 23:34:13,959 INFO L450 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-07-23 23:34:13,959 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-07-23 23:34:13,959 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 23:34:13,960 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 92 states. [2018-07-23 23:34:14,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:14,521 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2018-07-23 23:34:14,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-23 23:34:14,522 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 274 [2018-07-23 23:34:14,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:14,523 INFO L225 Difference]: With dead ends: 283 [2018-07-23 23:34:14,523 INFO L226 Difference]: Without dead ends: 279 [2018-07-23 23:34:14,523 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 23:34:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-07-23 23:34:14,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 278. [2018-07-23 23:34:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2018-07-23 23:34:14,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 278 transitions. [2018-07-23 23:34:14,527 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 278 transitions. Word has length 274 [2018-07-23 23:34:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:14,527 INFO L471 AbstractCegarLoop]: Abstraction has 278 states and 278 transitions. [2018-07-23 23:34:14,527 INFO L472 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-07-23 23:34:14,528 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 278 transitions. [2018-07-23 23:34:14,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-07-23 23:34:14,528 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:14,529 INFO L353 BasicCegarLoop]: trace histogram [91, 90, 90, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:14,529 INFO L414 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:14,529 INFO L82 PathProgramCache]: Analyzing trace with hash -152108275, now seen corresponding path program 90 times [2018-07-23 23:34:14,529 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:14,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:14,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:14,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:14,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:17,762 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:17,762 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:17,770 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:34:20,282 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-07-23 23:34:20,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:20,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:20,363 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:20,363 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-07-23 23:34:20,364 INFO L450 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-07-23 23:34:20,365 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-07-23 23:34:20,365 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 23:34:20,365 INFO L87 Difference]: Start difference. First operand 278 states and 278 transitions. Second operand 93 states. [2018-07-23 23:34:20,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:20,955 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2018-07-23 23:34:20,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-07-23 23:34:20,956 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 277 [2018-07-23 23:34:20,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:20,957 INFO L225 Difference]: With dead ends: 286 [2018-07-23 23:34:20,957 INFO L226 Difference]: Without dead ends: 282 [2018-07-23 23:34:20,957 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 23:34:20,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-07-23 23:34:20,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2018-07-23 23:34:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-07-23 23:34:20,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2018-07-23 23:34:20,960 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 277 [2018-07-23 23:34:20,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:20,960 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2018-07-23 23:34:20,960 INFO L472 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-07-23 23:34:20,961 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2018-07-23 23:34:20,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-07-23 23:34:20,961 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:20,962 INFO L353 BasicCegarLoop]: trace histogram [92, 91, 91, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:20,962 INFO L414 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:20,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1380067915, now seen corresponding path program 91 times [2018-07-23 23:34:20,962 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:20,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:20,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:20,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:20,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:24,280 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:24,280 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:24,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:24,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:24,469 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:24,469 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-07-23 23:34:24,470 INFO L450 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-07-23 23:34:24,470 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-07-23 23:34:24,471 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 23:34:24,471 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand 94 states. [2018-07-23 23:34:25,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:25,072 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-07-23 23:34:25,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-23 23:34:25,072 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 280 [2018-07-23 23:34:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:25,074 INFO L225 Difference]: With dead ends: 289 [2018-07-23 23:34:25,074 INFO L226 Difference]: Without dead ends: 285 [2018-07-23 23:34:25,074 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 23:34:25,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-07-23 23:34:25,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2018-07-23 23:34:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-07-23 23:34:25,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 284 transitions. [2018-07-23 23:34:25,077 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 284 transitions. Word has length 280 [2018-07-23 23:34:25,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:25,077 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 284 transitions. [2018-07-23 23:34:25,077 INFO L472 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-07-23 23:34:25,077 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 284 transitions. [2018-07-23 23:34:25,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-07-23 23:34:25,078 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:25,078 INFO L353 BasicCegarLoop]: trace histogram [93, 92, 92, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:25,078 INFO L414 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:25,079 INFO L82 PathProgramCache]: Analyzing trace with hash -471477683, now seen corresponding path program 92 times [2018-07-23 23:34:25,079 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:25,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:25,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:25,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:34:25,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:28,961 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:28,962 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:28,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:34:29,066 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:34:29,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:29,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:29,152 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:29,152 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-07-23 23:34:29,153 INFO L450 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-07-23 23:34:29,153 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-07-23 23:34:29,153 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 23:34:29,154 INFO L87 Difference]: Start difference. First operand 284 states and 284 transitions. Second operand 95 states. [2018-07-23 23:34:29,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:29,700 INFO L93 Difference]: Finished difference Result 292 states and 292 transitions. [2018-07-23 23:34:29,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-07-23 23:34:29,700 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 283 [2018-07-23 23:34:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:29,702 INFO L225 Difference]: With dead ends: 292 [2018-07-23 23:34:29,702 INFO L226 Difference]: Without dead ends: 288 [2018-07-23 23:34:29,703 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 23:34:29,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-07-23 23:34:29,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2018-07-23 23:34:29,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-07-23 23:34:29,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2018-07-23 23:34:29,708 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 283 [2018-07-23 23:34:29,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:29,708 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2018-07-23 23:34:29,708 INFO L472 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-07-23 23:34:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2018-07-23 23:34:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-07-23 23:34:29,709 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:29,709 INFO L353 BasicCegarLoop]: trace histogram [94, 93, 93, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:29,709 INFO L414 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:29,710 INFO L82 PathProgramCache]: Analyzing trace with hash 398594827, now seen corresponding path program 93 times [2018-07-23 23:34:29,710 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:29,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:29,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:29,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:29,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:32,909 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:32,909 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:32,919 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:34:37,638 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-07-23 23:34:37,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:37,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:37,730 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:37,730 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-07-23 23:34:37,730 INFO L450 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-07-23 23:34:37,731 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-07-23 23:34:37,731 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 23:34:37,731 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 96 states. [2018-07-23 23:34:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:38,147 INFO L93 Difference]: Finished difference Result 295 states and 295 transitions. [2018-07-23 23:34:38,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-23 23:34:38,147 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 286 [2018-07-23 23:34:38,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:38,149 INFO L225 Difference]: With dead ends: 295 [2018-07-23 23:34:38,149 INFO L226 Difference]: Without dead ends: 291 [2018-07-23 23:34:38,150 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 23:34:38,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-07-23 23:34:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2018-07-23 23:34:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-07-23 23:34:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 290 transitions. [2018-07-23 23:34:38,154 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 290 transitions. Word has length 286 [2018-07-23 23:34:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:38,154 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 290 transitions. [2018-07-23 23:34:38,154 INFO L472 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-07-23 23:34:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 290 transitions. [2018-07-23 23:34:38,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-07-23 23:34:38,155 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:38,155 INFO L353 BasicCegarLoop]: trace histogram [95, 94, 94, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:38,155 INFO L414 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:38,155 INFO L82 PathProgramCache]: Analyzing trace with hash 601108877, now seen corresponding path program 94 times [2018-07-23 23:34:38,155 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:38,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:38,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:38,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:38,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:41,433 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:41,433 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:41,441 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:34:41,537 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:34:41,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:34:41,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:34:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:41,626 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:34:41,626 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-07-23 23:34:41,627 INFO L450 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-07-23 23:34:41,627 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-07-23 23:34:41,628 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 23:34:41,628 INFO L87 Difference]: Start difference. First operand 290 states and 290 transitions. Second operand 97 states. [2018-07-23 23:34:42,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:34:42,264 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2018-07-23 23:34:42,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-07-23 23:34:42,265 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 289 [2018-07-23 23:34:42,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:34:42,267 INFO L225 Difference]: With dead ends: 298 [2018-07-23 23:34:42,267 INFO L226 Difference]: Without dead ends: 294 [2018-07-23 23:34:42,267 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 23:34:42,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-07-23 23:34:42,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2018-07-23 23:34:42,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-07-23 23:34:42,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2018-07-23 23:34:42,271 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 289 [2018-07-23 23:34:42,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:34:42,272 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2018-07-23 23:34:42,272 INFO L472 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-07-23 23:34:42,272 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2018-07-23 23:34:42,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-07-23 23:34:42,273 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:34:42,273 INFO L353 BasicCegarLoop]: trace histogram [96, 95, 95, 1, 1, 1, 1, 1, 1] [2018-07-23 23:34:42,273 INFO L414 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:34:42,273 INFO L82 PathProgramCache]: Analyzing trace with hash -731878453, now seen corresponding path program 95 times [2018-07-23 23:34:42,273 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:34:42,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:34:42,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:42,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:34:42,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:34:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:34:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:34:45,846 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:34:45,847 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:34:45,856 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown