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-new/count_by_nondet_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-23 23:41:26,161 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 23:41:26,163 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 23:41:26,176 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 23:41:26,176 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 23:41:26,177 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 23:41:26,179 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 23:41:26,180 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 23:41:26,182 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 23:41:26,183 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 23:41:26,184 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 23:41:26,184 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 23:41:26,185 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 23:41:26,186 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 23:41:26,188 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 23:41:26,189 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 23:41:26,190 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 23:41:26,192 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 23:41:26,194 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 23:41:26,196 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 23:41:26,199 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 23:41:26,207 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 23:41:26,209 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-23 23:41:26,224 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 23:41:26,249 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 23:41:26,249 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 23:41:26,250 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-23 23:41:26,250 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-07-23 23:41:26,251 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-07-23 23:41:26,251 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-07-23 23:41:26,252 INFO L133 SettingsManager]: * Use SBE=true [2018-07-23 23:41:26,252 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-23 23:41:26,252 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-23 23:41:26,252 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-23 23:41:26,252 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-23 23:41:26,253 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-23 23:41:26,253 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-23 23:41:26,253 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-23 23:41:26,253 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-23 23:41:26,254 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 23:41:26,254 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-23 23:41:26,254 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-23 23:41:26,254 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-23 23:41:26,254 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-23 23:41:26,255 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 23:41:26,255 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-23 23:41:26,255 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-23 23:41:26,255 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-07-23 23:41:26,255 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-23 23:41:26,256 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-23 23:41:26,256 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 23:41:26,256 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-23 23:41:26,308 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 23:41:26,326 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 23:41:26,333 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 23:41:26,335 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-23 23:41:26,336 INFO L276 PluginConnector]: CDTParser initialized [2018-07-23 23:41:26,336 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_nondet_true-unreach-call_true-termination.i [2018-07-23 23:41:26,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35d50ced7/0af82ea7e87b4bf5888137514c6c02b7/FLAG6081d575a [2018-07-23 23:41:26,855 INFO L276 CDTParser]: Found 1 translation units. [2018-07-23 23:41:26,855 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_nondet_true-unreach-call_true-termination.i [2018-07-23 23:41:26,861 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35d50ced7/0af82ea7e87b4bf5888137514c6c02b7/FLAG6081d575a [2018-07-23 23:41:26,876 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35d50ced7/0af82ea7e87b4bf5888137514c6c02b7 [2018-07-23 23:41:26,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 23:41:26,889 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-23 23:41:26,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-23 23:41:26,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-23 23:41:26,896 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-23 23:41:26,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:41:26" (1/1) ... [2018-07-23 23:41:26,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67890395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:41:26, skipping insertion in model container [2018-07-23 23:41:26,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:41:26" (1/1) ... [2018-07-23 23:41:27,100 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-23 23:41:27,146 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:41:27,163 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-23 23:41:27,168 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:41:27,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:41:27 WrapperNode [2018-07-23 23:41:27,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-23 23:41:27,182 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-23 23:41:27,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-23 23:41:27,182 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-23 23:41:27,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:41:27" (1/1) ... [2018-07-23 23:41:27,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:41:27" (1/1) ... [2018-07-23 23:41:27,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-23 23:41:27,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 23:41:27,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 23:41:27,221 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 23:41:27,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:41:27" (1/1) ... [2018-07-23 23:41:27,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:41:27" (1/1) ... [2018-07-23 23:41:27,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:41:27" (1/1) ... [2018-07-23 23:41:27,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:41:27" (1/1) ... [2018-07-23 23:41:27,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:41:27" (1/1) ... [2018-07-23 23:41:27,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:41:27" (1/1) ... [2018-07-23 23:41:27,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:41:27" (1/1) ... [2018-07-23 23:41:27,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 23:41:27,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 23:41:27,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 23:41:27,251 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 23:41:27,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:41:27" (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 23:41:27,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 23:41:27,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 23:41:27,630 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 23:41:27,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:41:27 BoogieIcfgContainer [2018-07-23 23:41:27,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 23:41:27,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 23:41:27,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 23:41:27,636 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 23:41:27,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 11:41:26" (1/3) ... [2018-07-23 23:41:27,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7486c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:41:27, skipping insertion in model container [2018-07-23 23:41:27,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:41:27" (2/3) ... [2018-07-23 23:41:27,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7486c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:41:27, skipping insertion in model container [2018-07-23 23:41:27,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:41:27" (3/3) ... [2018-07-23 23:41:27,641 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_nondet_true-unreach-call_true-termination.i [2018-07-23 23:41:27,650 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-23 23:41:27,658 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 23:41:27,707 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 23:41:27,708 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 23:41:27,708 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 23:41:27,708 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-23 23:41:27,708 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 23:41:27,708 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 23:41:27,709 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 23:41:27,709 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 23:41:27,709 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 23:41:27,726 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-07-23 23:41:27,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 23:41:27,731 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:27,732 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-07-23 23:41:27,732 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:27,737 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2018-07-23 23:41:27,738 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:27,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:27,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:27,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:27,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:27,849 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 23:41:27,853 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:41:27,853 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 23:41:27,858 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-23 23:41:27,872 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-23 23:41:27,873 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-23 23:41:27,876 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-07-23 23:41:27,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:27,890 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-07-23 23:41:27,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-23 23:41:27,892 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-07-23 23:41:27,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:27,901 INFO L225 Difference]: With dead ends: 21 [2018-07-23 23:41:27,902 INFO L226 Difference]: Without dead ends: 9 [2018-07-23 23:41:27,905 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 23:41:27,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-23 23:41:27,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-07-23 23:41:27,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-23 23:41:27,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-07-23 23:41:27,938 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-07-23 23:41:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:27,939 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-07-23 23:41:27,939 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-23 23:41:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-07-23 23:41:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-23 23:41:27,939 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:27,940 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:27,940 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:27,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1805928624, now seen corresponding path program 1 times [2018-07-23 23:41:27,940 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:27,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:27,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:27,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:27,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:28,003 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 23:41:28,004 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:41:28,004 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 23:41:28,005 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 23:41:28,006 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 23:41:28,006 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:41:28,007 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2018-07-23 23:41:28,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:28,083 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-07-23 23:41:28,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 23:41:28,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-07-23 23:41:28,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:28,085 INFO L225 Difference]: With dead ends: 16 [2018-07-23 23:41:28,085 INFO L226 Difference]: Without dead ends: 12 [2018-07-23 23:41:28,086 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 23:41:28,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-23 23:41:28,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-07-23 23:41:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-23 23:41:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-07-23 23:41:28,090 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2018-07-23 23:41:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:28,090 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-07-23 23:41:28,091 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 23:41:28,091 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-07-23 23:41:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 23:41:28,091 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:28,092 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:28,092 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:28,092 INFO L82 PathProgramCache]: Analyzing trace with hash -992267733, now seen corresponding path program 1 times [2018-07-23 23:41:28,092 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:28,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:28,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:28,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:28,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:28,211 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 23:41:28,211 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:28,211 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 23:41:28,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:28,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:28,282 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 23:41:28,306 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:28,306 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-07-23 23:41:28,306 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 23:41:28,307 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 23:41:28,307 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 23:41:28,307 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-07-23 23:41:28,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:28,374 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-07-23 23:41:28,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 23:41:28,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-07-23 23:41:28,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:28,375 INFO L225 Difference]: With dead ends: 18 [2018-07-23 23:41:28,376 INFO L226 Difference]: Without dead ends: 14 [2018-07-23 23:41:28,377 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 23:41:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-07-23 23:41:28,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-07-23 23:41:28,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-23 23:41:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-07-23 23:41:28,380 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2018-07-23 23:41:28,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:28,381 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-07-23 23:41:28,381 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 23:41:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-07-23 23:41:28,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-23 23:41:28,382 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:28,382 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:28,382 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:28,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1039691056, now seen corresponding path program 2 times [2018-07-23 23:41:28,383 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:28,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:28,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:28,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:28,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:28,536 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 23:41:28,537 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:28,537 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 23:41:28,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:41:28,568 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:41:28,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:28,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:28,579 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 23:41:28,600 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:28,600 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-07-23 23:41:28,601 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 23:41:28,601 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 23:41:28,601 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-23 23:41:28,601 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-07-23 23:41:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:28,673 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-07-23 23:41:28,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 23:41:28,674 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-07-23 23:41:28,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:28,675 INFO L225 Difference]: With dead ends: 22 [2018-07-23 23:41:28,675 INFO L226 Difference]: Without dead ends: 18 [2018-07-23 23:41:28,676 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-07-23 23:41:28,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-23 23:41:28,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-07-23 23:41:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-23 23:41:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-07-23 23:41:28,680 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2018-07-23 23:41:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:28,680 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-07-23 23:41:28,681 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 23:41:28,681 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-07-23 23:41:28,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-23 23:41:28,682 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:28,682 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:28,682 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:28,683 INFO L82 PathProgramCache]: Analyzing trace with hash -783666165, now seen corresponding path program 3 times [2018-07-23 23:41:28,683 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:28,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:28,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:28,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:28,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:29,016 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 23:41:29,016 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:29,016 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 23:41:29,029 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:41:29,051 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-23 23:41:29,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:29,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:29,063 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 23:41:29,084 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:29,084 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-07-23 23:41:29,084 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 23:41:29,084 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 23:41:29,085 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-07-23 23:41:29,085 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2018-07-23 23:41:29,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:29,144 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-07-23 23:41:29,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 23:41:29,145 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-07-23 23:41:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:29,146 INFO L225 Difference]: With dead ends: 25 [2018-07-23 23:41:29,146 INFO L226 Difference]: Without dead ends: 21 [2018-07-23 23:41:29,146 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-07-23 23:41:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-23 23:41:29,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-07-23 23:41:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-23 23:41:29,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-07-23 23:41:29,151 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-07-23 23:41:29,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:29,151 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-07-23 23:41:29,151 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 23:41:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-07-23 23:41:29,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-23 23:41:29,152 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:29,152 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:29,153 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:29,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1408056080, now seen corresponding path program 4 times [2018-07-23 23:41:29,153 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:29,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:29,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:29,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:29,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:29,293 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 23:41:29,294 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:29,295 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 23:41:29,307 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:41:29,325 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:41:29,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:29,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:29,337 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 23:41:29,361 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:29,361 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-07-23 23:41:29,362 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 23:41:29,362 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 23:41:29,362 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-07-23 23:41:29,363 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2018-07-23 23:41:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:29,539 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-07-23 23:41:29,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 23:41:29,540 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-07-23 23:41:29,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:29,541 INFO L225 Difference]: With dead ends: 28 [2018-07-23 23:41:29,541 INFO L226 Difference]: Without dead ends: 24 [2018-07-23 23:41:29,542 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-23 23:41:29,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-23 23:41:29,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-07-23 23:41:29,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-07-23 23:41:29,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-07-23 23:41:29,547 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2018-07-23 23:41:29,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:29,548 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-07-23 23:41:29,548 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 23:41:29,548 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-07-23 23:41:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-23 23:41:29,549 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:29,549 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:29,549 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:29,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1104654869, now seen corresponding path program 5 times [2018-07-23 23:41:29,549 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:29,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:29,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:29,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:29,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:29,707 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 23:41:29,708 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:29,708 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 23:41:29,717 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:41:29,740 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-07-23 23:41:29,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:29,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:29,755 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 23:41:29,784 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:29,784 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-07-23 23:41:29,784 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 23:41:29,784 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 23:41:29,785 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-07-23 23:41:29,785 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2018-07-23 23:41:29,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:29,968 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-07-23 23:41:29,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 23:41:29,968 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-07-23 23:41:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:29,970 INFO L225 Difference]: With dead ends: 31 [2018-07-23 23:41:29,970 INFO L226 Difference]: Without dead ends: 27 [2018-07-23 23:41:29,970 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-07-23 23:41:29,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-23 23:41:29,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-07-23 23:41:29,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-23 23:41:29,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-07-23 23:41:29,975 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2018-07-23 23:41:29,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:29,975 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-07-23 23:41:29,975 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 23:41:29,975 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-07-23 23:41:29,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-23 23:41:29,976 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:29,976 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:29,977 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:29,977 INFO L82 PathProgramCache]: Analyzing trace with hash 909631248, now seen corresponding path program 6 times [2018-07-23 23:41:29,977 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:29,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:29,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:29,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:29,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:30,426 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 23:41:30,427 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:30,427 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) [2018-07-23 23:41:30,440 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:41:30,466 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-07-23 23:41:30,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:30,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:30,480 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 23:41:30,500 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:30,501 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-07-23 23:41:30,501 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 23:41:30,501 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 23:41:30,501 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-07-23 23:41:30,502 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 10 states. [2018-07-23 23:41:30,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:30,610 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-07-23 23:41:30,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 23:41:30,611 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2018-07-23 23:41:30,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:30,612 INFO L225 Difference]: With dead ends: 34 [2018-07-23 23:41:30,613 INFO L226 Difference]: Without dead ends: 30 [2018-07-23 23:41:30,613 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-07-23 23:41:30,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-07-23 23:41:30,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-07-23 23:41:30,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-07-23 23:41:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-07-23 23:41:30,617 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-07-23 23:41:30,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:30,618 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-07-23 23:41:30,618 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 23:41:30,618 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-07-23 23:41:30,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-23 23:41:30,619 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:30,619 INFO L353 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:30,619 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:30,619 INFO L82 PathProgramCache]: Analyzing trace with hash -775716917, now seen corresponding path program 7 times [2018-07-23 23:41:30,620 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:30,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:30,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:30,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:30,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:30,776 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 23:41:30,776 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:30,776 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 23:41:30,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:30,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:30,819 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 23:41:30,844 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:30,844 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-07-23 23:41:30,845 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 23:41:30,845 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 23:41:30,845 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2018-07-23 23:41:30,846 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 11 states. [2018-07-23 23:41:30,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:30,915 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-07-23 23:41:30,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 23:41:30,917 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2018-07-23 23:41:30,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:30,918 INFO L225 Difference]: With dead ends: 37 [2018-07-23 23:41:30,918 INFO L226 Difference]: Without dead ends: 33 [2018-07-23 23:41:30,918 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-07-23 23:41:30,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-07-23 23:41:30,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-07-23 23:41:30,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-23 23:41:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-07-23 23:41:30,923 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-07-23 23:41:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:30,923 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-07-23 23:41:30,923 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 23:41:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-07-23 23:41:30,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-23 23:41:30,924 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:30,925 INFO L353 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:30,925 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:30,925 INFO L82 PathProgramCache]: Analyzing trace with hash -815210192, now seen corresponding path program 8 times [2018-07-23 23:41:30,925 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:30,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:30,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:30,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:30,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:31,274 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 23:41:31,275 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:31,275 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 23:41:31,303 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:41:31,331 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:41:31,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:31,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:31,351 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 23:41:31,373 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:31,373 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-07-23 23:41:31,374 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 23:41:31,374 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 23:41:31,374 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2018-07-23 23:41:31,374 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 12 states. [2018-07-23 23:41:31,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:31,725 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-07-23 23:41:31,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 23:41:31,729 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2018-07-23 23:41:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:31,730 INFO L225 Difference]: With dead ends: 40 [2018-07-23 23:41:31,730 INFO L226 Difference]: Without dead ends: 36 [2018-07-23 23:41:31,730 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-07-23 23:41:31,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-23 23:41:31,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-07-23 23:41:31,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-23 23:41:31,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-07-23 23:41:31,735 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-07-23 23:41:31,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:31,735 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-07-23 23:41:31,736 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 23:41:31,736 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-07-23 23:41:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-23 23:41:31,737 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:31,737 INFO L353 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:31,737 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:31,737 INFO L82 PathProgramCache]: Analyzing trace with hash -538326613, now seen corresponding path program 9 times [2018-07-23 23:41:31,737 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:31,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:31,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:31,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:31,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:32,284 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 23:41:32,285 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:32,285 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 23:41:32,294 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:41:32,367 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-07-23 23:41:32,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:32,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:32,383 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 23:41:32,406 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:32,406 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-07-23 23:41:32,407 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 23:41:32,407 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 23:41:32,407 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2018-07-23 23:41:32,407 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 13 states. [2018-07-23 23:41:32,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:32,486 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-07-23 23:41:32,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-23 23:41:32,487 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2018-07-23 23:41:32,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:32,488 INFO L225 Difference]: With dead ends: 43 [2018-07-23 23:41:32,488 INFO L226 Difference]: Without dead ends: 39 [2018-07-23 23:41:32,489 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2018-07-23 23:41:32,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-23 23:41:32,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-07-23 23:41:32,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-07-23 23:41:32,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-07-23 23:41:32,494 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-07-23 23:41:32,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:32,495 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-07-23 23:41:32,495 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 23:41:32,495 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-07-23 23:41:32,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-07-23 23:41:32,496 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:32,496 INFO L353 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:32,496 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:32,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1763167056, now seen corresponding path program 10 times [2018-07-23 23:41:32,497 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:32,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:32,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:32,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:32,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:33,021 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 23:41:33,021 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:33,022 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 23:41:33,030 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:41:33,057 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:41:33,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:33,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:33,083 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 23:41:33,108 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:33,108 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-07-23 23:41:33,109 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 23:41:33,109 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 23:41:33,109 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2018-07-23 23:41:33,109 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 14 states. [2018-07-23 23:41:33,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:33,165 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-07-23 23:41:33,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 23:41:33,166 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2018-07-23 23:41:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:33,167 INFO L225 Difference]: With dead ends: 46 [2018-07-23 23:41:33,167 INFO L226 Difference]: Without dead ends: 42 [2018-07-23 23:41:33,168 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-07-23 23:41:33,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-23 23:41:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-07-23 23:41:33,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-07-23 23:41:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-07-23 23:41:33,172 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-07-23 23:41:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:33,173 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-07-23 23:41:33,173 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 23:41:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-07-23 23:41:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-23 23:41:33,174 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:33,174 INFO L353 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:33,174 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:33,175 INFO L82 PathProgramCache]: Analyzing trace with hash 703146891, now seen corresponding path program 11 times [2018-07-23 23:41:33,175 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:33,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:33,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:33,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:33,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:33,410 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 23:41:33,411 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:33,411 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 23:41:33,424 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:41:33,461 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-07-23 23:41:33,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:33,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:33,480 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 23:41:33,502 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:33,502 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-07-23 23:41:33,502 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 23:41:33,502 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 23:41:33,503 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2018-07-23 23:41:33,503 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 15 states. [2018-07-23 23:41:33,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:33,576 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-07-23 23:41:33,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 23:41:33,577 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-07-23 23:41:33,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:33,578 INFO L225 Difference]: With dead ends: 49 [2018-07-23 23:41:33,578 INFO L226 Difference]: Without dead ends: 45 [2018-07-23 23:41:33,579 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2018-07-23 23:41:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-07-23 23:41:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-07-23 23:41:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-23 23:41:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-07-23 23:41:33,583 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-07-23 23:41:33,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:33,583 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-07-23 23:41:33,583 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 23:41:33,584 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-07-23 23:41:33,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-23 23:41:33,584 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:33,585 INFO L353 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:33,585 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:33,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1758028432, now seen corresponding path program 12 times [2018-07-23 23:41:33,585 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:33,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:33,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:33,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:33,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:33,860 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 23:41:33,861 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:33,861 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 23:41:33,872 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:41:33,919 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-07-23 23:41:33,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:33,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:33,936 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 23:41:33,964 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:33,964 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-07-23 23:41:33,964 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 23:41:33,965 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 23:41:33,965 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2018-07-23 23:41:33,965 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 16 states. [2018-07-23 23:41:34,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:34,046 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-07-23 23:41:34,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 23:41:34,047 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2018-07-23 23:41:34,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:34,048 INFO L225 Difference]: With dead ends: 52 [2018-07-23 23:41:34,048 INFO L226 Difference]: Without dead ends: 48 [2018-07-23 23:41:34,049 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2018-07-23 23:41:34,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-07-23 23:41:34,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-07-23 23:41:34,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-07-23 23:41:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-07-23 23:41:34,056 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-07-23 23:41:34,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:34,056 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-07-23 23:41:34,056 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 23:41:34,056 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-07-23 23:41:34,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-23 23:41:34,057 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:34,058 INFO L353 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:34,058 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:34,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1049601387, now seen corresponding path program 13 times [2018-07-23 23:41:34,058 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:34,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:34,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:34,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:34,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:34,403 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 23:41:34,404 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:34,404 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 23:41:34,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:34,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:34,465 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 23:41:34,496 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:34,496 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-07-23 23:41:34,496 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 23:41:34,497 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 23:41:34,497 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2018-07-23 23:41:34,497 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 17 states. [2018-07-23 23:41:34,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:34,576 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-07-23 23:41:34,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 23:41:34,576 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2018-07-23 23:41:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:34,577 INFO L225 Difference]: With dead ends: 55 [2018-07-23 23:41:34,577 INFO L226 Difference]: Without dead ends: 51 [2018-07-23 23:41:34,578 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2018-07-23 23:41:34,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-07-23 23:41:34,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-07-23 23:41:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-07-23 23:41:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-07-23 23:41:34,583 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-07-23 23:41:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:34,583 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-07-23 23:41:34,584 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 23:41:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-07-23 23:41:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-07-23 23:41:34,585 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:34,585 INFO L353 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:34,585 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:34,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1338550384, now seen corresponding path program 14 times [2018-07-23 23:41:34,585 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:34,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:34,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:34,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:34,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:34,965 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 23:41:34,965 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:34,965 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:41:34,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:41:35,006 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:41:35,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:35,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:35,031 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 23:41:35,054 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:35,054 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-07-23 23:41:35,055 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 23:41:35,055 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 23:41:35,055 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2018-07-23 23:41:35,056 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 18 states. [2018-07-23 23:41:35,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:35,190 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-07-23 23:41:35,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 23:41:35,191 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2018-07-23 23:41:35,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:35,192 INFO L225 Difference]: With dead ends: 58 [2018-07-23 23:41:35,192 INFO L226 Difference]: Without dead ends: 54 [2018-07-23 23:41:35,193 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=200, Unknown=0, NotChecked=0, Total=342 [2018-07-23 23:41:35,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-07-23 23:41:35,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-07-23 23:41:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-23 23:41:35,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-07-23 23:41:35,197 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-07-23 23:41:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:35,198 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-07-23 23:41:35,198 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 23:41:35,198 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-07-23 23:41:35,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-23 23:41:35,199 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:35,199 INFO L353 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:35,199 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:35,200 INFO L82 PathProgramCache]: Analyzing trace with hash -634702005, now seen corresponding path program 15 times [2018-07-23 23:41:35,200 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:35,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:35,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:35,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:35,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:35,562 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 23:41:35,562 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:35,562 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 23:41:35,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:41:35,654 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-07-23 23:41:35,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:35,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:35,673 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 23:41:35,693 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:35,693 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-07-23 23:41:35,694 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 23:41:35,694 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 23:41:35,694 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2018-07-23 23:41:35,695 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 19 states. [2018-07-23 23:41:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:35,746 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-07-23 23:41:35,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 23:41:35,747 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2018-07-23 23:41:35,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:35,748 INFO L225 Difference]: With dead ends: 61 [2018-07-23 23:41:35,748 INFO L226 Difference]: Without dead ends: 57 [2018-07-23 23:41:35,749 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=221, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:41:35,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-07-23 23:41:35,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-07-23 23:41:35,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-07-23 23:41:35,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-07-23 23:41:35,755 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-07-23 23:41:35,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:35,755 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-07-23 23:41:35,755 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 23:41:35,755 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-07-23 23:41:35,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-23 23:41:35,756 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:35,756 INFO L353 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:35,756 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:35,757 INFO L82 PathProgramCache]: Analyzing trace with hash -317982288, now seen corresponding path program 16 times [2018-07-23 23:41:35,757 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:35,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:35,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:35,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:35,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:36,094 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 23:41:36,094 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:36,095 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 23:41:36,104 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:41:36,143 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:41:36,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:36,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:36,168 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 23:41:36,188 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:36,188 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-07-23 23:41:36,188 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 23:41:36,189 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 23:41:36,189 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:41:36,189 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 20 states. [2018-07-23 23:41:36,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:36,390 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-07-23 23:41:36,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 23:41:36,390 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2018-07-23 23:41:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:36,391 INFO L225 Difference]: With dead ends: 64 [2018-07-23 23:41:36,391 INFO L226 Difference]: Without dead ends: 60 [2018-07-23 23:41:36,392 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=243, Unknown=0, NotChecked=0, Total=420 [2018-07-23 23:41:36,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-07-23 23:41:36,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-07-23 23:41:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-07-23 23:41:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-07-23 23:41:36,396 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-07-23 23:41:36,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:36,397 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-07-23 23:41:36,397 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 23:41:36,397 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-07-23 23:41:36,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-23 23:41:36,398 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:36,398 INFO L353 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:36,398 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:36,398 INFO L82 PathProgramCache]: Analyzing trace with hash -964042453, now seen corresponding path program 17 times [2018-07-23 23:41:36,398 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:36,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:36,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:36,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:36,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:37,298 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 23:41:37,299 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:37,299 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:41:37,310 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:41:37,352 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-07-23 23:41:37,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:37,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:37,366 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 23:41:37,396 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:37,397 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-07-23 23:41:37,397 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 23:41:37,398 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 23:41:37,398 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2018-07-23 23:41:37,399 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 21 states. [2018-07-23 23:41:37,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:37,475 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-07-23 23:41:37,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 23:41:37,475 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2018-07-23 23:41:37,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:37,476 INFO L225 Difference]: With dead ends: 67 [2018-07-23 23:41:37,476 INFO L226 Difference]: Without dead ends: 63 [2018-07-23 23:41:37,476 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=266, Unknown=0, NotChecked=0, Total=462 [2018-07-23 23:41:37,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-07-23 23:41:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-07-23 23:41:37,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-07-23 23:41:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-07-23 23:41:37,482 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2018-07-23 23:41:37,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:37,482 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-07-23 23:41:37,482 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 23:41:37,482 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-07-23 23:41:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-07-23 23:41:37,483 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:37,483 INFO L353 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:37,483 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:37,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1993964592, now seen corresponding path program 18 times [2018-07-23 23:41:37,484 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:37,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:37,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:37,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:37,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:38,252 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 23:41:38,253 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:38,253 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 23:41:38,260 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:41:38,365 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-07-23 23:41:38,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:38,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:38,387 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 23:41:38,418 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:38,418 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-07-23 23:41:38,419 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 23:41:38,419 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 23:41:38,419 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2018-07-23 23:41:38,420 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 22 states. [2018-07-23 23:41:38,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:38,696 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-07-23 23:41:38,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 23:41:38,696 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2018-07-23 23:41:38,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:38,697 INFO L225 Difference]: With dead ends: 70 [2018-07-23 23:41:38,697 INFO L226 Difference]: Without dead ends: 66 [2018-07-23 23:41:38,698 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=290, Unknown=0, NotChecked=0, Total=506 [2018-07-23 23:41:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-07-23 23:41:38,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-07-23 23:41:38,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-07-23 23:41:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-07-23 23:41:38,704 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2018-07-23 23:41:38,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:38,704 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-07-23 23:41:38,704 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 23:41:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-07-23 23:41:38,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-07-23 23:41:38,705 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:38,705 INFO L353 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:38,706 INFO L414 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:38,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1158044917, now seen corresponding path program 19 times [2018-07-23 23:41:38,706 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:38,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:38,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:38,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:38,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:39,103 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 23:41:39,103 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:39,104 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 23:41:39,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:39,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:39,164 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 23:41:39,193 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:39,193 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-07-23 23:41:39,194 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 23:41:39,194 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 23:41:39,194 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2018-07-23 23:41:39,195 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 23 states. [2018-07-23 23:41:39,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:39,272 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-07-23 23:41:39,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 23:41:39,273 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2018-07-23 23:41:39,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:39,273 INFO L225 Difference]: With dead ends: 73 [2018-07-23 23:41:39,273 INFO L226 Difference]: Without dead ends: 69 [2018-07-23 23:41:39,274 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=237, Invalid=315, Unknown=0, NotChecked=0, Total=552 [2018-07-23 23:41:39,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-07-23 23:41:39,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-07-23 23:41:39,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-07-23 23:41:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-07-23 23:41:39,278 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2018-07-23 23:41:39,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:39,278 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-07-23 23:41:39,278 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 23:41:39,278 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-07-23 23:41:39,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-07-23 23:41:39,279 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:39,279 INFO L353 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:39,279 INFO L414 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:39,280 INFO L82 PathProgramCache]: Analyzing trace with hash -495389200, now seen corresponding path program 20 times [2018-07-23 23:41:39,280 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:39,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:39,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:39,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:39,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:40,128 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 23:41:40,128 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:40,128 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 23:41:40,139 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:41:40,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:41:40,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:40,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:40,192 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 23:41:40,212 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:40,213 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-07-23 23:41:40,213 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 23:41:40,213 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 23:41:40,213 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2018-07-23 23:41:40,214 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 24 states. [2018-07-23 23:41:40,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:40,282 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-07-23 23:41:40,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 23:41:40,286 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2018-07-23 23:41:40,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:40,287 INFO L225 Difference]: With dead ends: 76 [2018-07-23 23:41:40,287 INFO L226 Difference]: Without dead ends: 72 [2018-07-23 23:41:40,287 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2018-07-23 23:41:40,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-07-23 23:41:40,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-07-23 23:41:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-23 23:41:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-07-23 23:41:40,290 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2018-07-23 23:41:40,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:40,290 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-07-23 23:41:40,290 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 23:41:40,290 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-07-23 23:41:40,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-07-23 23:41:40,291 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:40,291 INFO L353 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:40,291 INFO L414 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:40,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1011383531, now seen corresponding path program 21 times [2018-07-23 23:41:40,291 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:40,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:40,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:40,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:40,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:40,784 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 23:41:40,784 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:40,784 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) [2018-07-23 23:41:40,798 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:41:40,847 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-07-23 23:41:40,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:40,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:40,866 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 23:41:40,895 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:40,895 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-07-23 23:41:40,895 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 23:41:40,896 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 23:41:40,896 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2018-07-23 23:41:40,896 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 25 states. [2018-07-23 23:41:41,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:41,003 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-07-23 23:41:41,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-23 23:41:41,004 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 70 [2018-07-23 23:41:41,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:41,004 INFO L225 Difference]: With dead ends: 79 [2018-07-23 23:41:41,005 INFO L226 Difference]: Without dead ends: 75 [2018-07-23 23:41:41,005 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=282, Invalid=368, Unknown=0, NotChecked=0, Total=650 [2018-07-23 23:41:41,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-07-23 23:41:41,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-07-23 23:41:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-07-23 23:41:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-07-23 23:41:41,010 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2018-07-23 23:41:41,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:41,011 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-07-23 23:41:41,011 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 23:41:41,012 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-07-23 23:41:41,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-07-23 23:41:41,012 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:41,012 INFO L353 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:41,013 INFO L414 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:41,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1720365040, now seen corresponding path program 22 times [2018-07-23 23:41:41,013 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:41,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:41,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:41,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:41,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:41,701 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 23:41:41,702 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:41,702 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 23:41:41,709 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:41:41,757 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:41:41,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:41,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:41,775 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 23:41:41,808 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:41,809 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-07-23 23:41:41,809 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 23:41:41,810 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 23:41:41,810 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2018-07-23 23:41:41,810 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 26 states. [2018-07-23 23:41:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:41,894 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-07-23 23:41:41,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 23:41:41,895 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2018-07-23 23:41:41,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:41,896 INFO L225 Difference]: With dead ends: 82 [2018-07-23 23:41:41,896 INFO L226 Difference]: Without dead ends: 78 [2018-07-23 23:41:41,897 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2018-07-23 23:41:41,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-07-23 23:41:41,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-07-23 23:41:41,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-07-23 23:41:41,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-07-23 23:41:41,901 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2018-07-23 23:41:41,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:41,901 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-07-23 23:41:41,901 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 23:41:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-07-23 23:41:41,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-07-23 23:41:41,902 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:41,902 INFO L353 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:41,903 INFO L414 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:41,903 INFO L82 PathProgramCache]: Analyzing trace with hash 2093248203, now seen corresponding path program 23 times [2018-07-23 23:41:41,903 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:41,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:41,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:41,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:41,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:42,928 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 23:41:42,928 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:42,928 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 23:41:42,938 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:41:42,999 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-07-23 23:41:43,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:43,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:43,019 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 23:41:43,039 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:43,039 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-07-23 23:41:43,040 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 23:41:43,040 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 23:41:43,040 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2018-07-23 23:41:43,040 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 27 states. [2018-07-23 23:41:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:43,204 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-07-23 23:41:43,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 23:41:43,205 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 76 [2018-07-23 23:41:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:43,206 INFO L225 Difference]: With dead ends: 85 [2018-07-23 23:41:43,206 INFO L226 Difference]: Without dead ends: 81 [2018-07-23 23:41:43,207 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=331, Invalid=425, Unknown=0, NotChecked=0, Total=756 [2018-07-23 23:41:43,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-07-23 23:41:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2018-07-23 23:41:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-23 23:41:43,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-07-23 23:41:43,210 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2018-07-23 23:41:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:43,211 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-07-23 23:41:43,211 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 23:41:43,211 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-07-23 23:41:43,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-07-23 23:41:43,212 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:43,212 INFO L353 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:43,212 INFO L414 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:43,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1324510672, now seen corresponding path program 24 times [2018-07-23 23:41:43,213 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:43,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:43,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:43,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:43,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:44,402 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 23:41:44,402 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:44,402 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 23:41:44,410 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:41:44,473 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-07-23 23:41:44,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:44,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:44,491 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 23:41:44,520 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:44,520 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-07-23 23:41:44,521 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 23:41:44,521 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 23:41:44,521 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2018-07-23 23:41:44,522 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 28 states. [2018-07-23 23:41:44,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:44,661 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-07-23 23:41:44,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 23:41:44,661 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2018-07-23 23:41:44,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:44,662 INFO L225 Difference]: With dead ends: 88 [2018-07-23 23:41:44,663 INFO L226 Difference]: Without dead ends: 84 [2018-07-23 23:41:44,663 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=357, Invalid=455, Unknown=0, NotChecked=0, Total=812 [2018-07-23 23:41:44,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-07-23 23:41:44,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2018-07-23 23:41:44,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-07-23 23:41:44,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-07-23 23:41:44,667 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2018-07-23 23:41:44,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:44,667 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-07-23 23:41:44,667 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 23:41:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-07-23 23:41:44,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-07-23 23:41:44,668 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:44,668 INFO L353 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:44,668 INFO L414 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:44,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1010530475, now seen corresponding path program 25 times [2018-07-23 23:41:44,669 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:44,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:44,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:44,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:44,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:45,152 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 23:41:45,152 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:45,152 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 23:41:45,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:45,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:45,228 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 23:41:45,248 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:45,248 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-07-23 23:41:45,248 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 23:41:45,249 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 23:41:45,249 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2018-07-23 23:41:45,250 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 29 states. [2018-07-23 23:41:45,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:45,320 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-07-23 23:41:45,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 23:41:45,321 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 82 [2018-07-23 23:41:45,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:45,322 INFO L225 Difference]: With dead ends: 91 [2018-07-23 23:41:45,322 INFO L226 Difference]: Without dead ends: 87 [2018-07-23 23:41:45,323 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=384, Invalid=486, Unknown=0, NotChecked=0, Total=870 [2018-07-23 23:41:45,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-07-23 23:41:45,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-07-23 23:41:45,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-07-23 23:41:45,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-07-23 23:41:45,326 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 82 [2018-07-23 23:41:45,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:45,326 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-07-23 23:41:45,326 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 23:41:45,327 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-07-23 23:41:45,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-07-23 23:41:45,327 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:45,327 INFO L353 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:45,328 INFO L414 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:45,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1363952560, now seen corresponding path program 26 times [2018-07-23 23:41:45,328 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:45,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:45,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:45,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:45,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:45,749 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 23:41:45,750 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:45,750 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 23:41:45,757 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:41:45,803 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:41:45,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:45,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:45,821 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 23:41:45,851 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:45,851 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-07-23 23:41:45,851 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 23:41:45,851 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 23:41:45,852 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2018-07-23 23:41:45,852 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 30 states. [2018-07-23 23:41:45,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:45,972 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-07-23 23:41:45,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 23:41:45,972 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2018-07-23 23:41:45,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:45,973 INFO L225 Difference]: With dead ends: 94 [2018-07-23 23:41:45,973 INFO L226 Difference]: Without dead ends: 90 [2018-07-23 23:41:45,973 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=412, Invalid=518, Unknown=0, NotChecked=0, Total=930 [2018-07-23 23:41:45,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-07-23 23:41:45,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-07-23 23:41:45,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 23:41:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-07-23 23:41:45,976 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 85 [2018-07-23 23:41:45,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:45,976 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-07-23 23:41:45,976 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 23:41:45,976 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-07-23 23:41:45,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-07-23 23:41:45,977 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:45,977 INFO L353 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:45,977 INFO L414 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:45,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1476683125, now seen corresponding path program 27 times [2018-07-23 23:41:45,978 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:45,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:45,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:45,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:45,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:46,411 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 23:41:46,411 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:46,411 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 23:41:46,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:41:46,482 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-07-23 23:41:46,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:46,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:46,498 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 23:41:46,519 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:46,519 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-07-23 23:41:46,519 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 23:41:46,520 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 23:41:46,520 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2018-07-23 23:41:46,520 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 31 states. [2018-07-23 23:41:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:46,605 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-07-23 23:41:46,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-23 23:41:46,606 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 88 [2018-07-23 23:41:46,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:46,607 INFO L225 Difference]: With dead ends: 97 [2018-07-23 23:41:46,607 INFO L226 Difference]: Without dead ends: 93 [2018-07-23 23:41:46,608 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=441, Invalid=551, Unknown=0, NotChecked=0, Total=992 [2018-07-23 23:41:46,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-07-23 23:41:46,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2018-07-23 23:41:46,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-07-23 23:41:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-07-23 23:41:46,612 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 88 [2018-07-23 23:41:46,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:46,612 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-07-23 23:41:46,612 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 23:41:46,612 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-07-23 23:41:46,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-07-23 23:41:46,613 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:46,613 INFO L353 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:46,613 INFO L414 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:46,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1168519568, now seen corresponding path program 28 times [2018-07-23 23:41:46,613 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:46,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:46,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:46,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:46,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:47,242 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 23:41:47,242 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:47,242 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 23:41:47,251 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:41:47,298 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:41:47,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:47,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:47,317 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 23:41:47,339 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:47,339 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-07-23 23:41:47,340 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 23:41:47,340 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 23:41:47,340 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2018-07-23 23:41:47,340 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 32 states. [2018-07-23 23:41:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:47,455 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-07-23 23:41:47,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 23:41:47,456 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 91 [2018-07-23 23:41:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:47,457 INFO L225 Difference]: With dead ends: 100 [2018-07-23 23:41:47,457 INFO L226 Difference]: Without dead ends: 96 [2018-07-23 23:41:47,458 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=471, Invalid=585, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 23:41:47,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-07-23 23:41:47,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2018-07-23 23:41:47,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-07-23 23:41:47,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-07-23 23:41:47,461 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 91 [2018-07-23 23:41:47,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:47,462 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-07-23 23:41:47,462 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 23:41:47,462 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-07-23 23:41:47,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-07-23 23:41:47,462 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:47,462 INFO L353 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:47,462 INFO L414 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:47,463 INFO L82 PathProgramCache]: Analyzing trace with hash 986895467, now seen corresponding path program 29 times [2018-07-23 23:41:47,463 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:47,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:47,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:47,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:47,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:48,232 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 23:41:48,232 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:48,232 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 23:41:48,240 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:41:48,322 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-07-23 23:41:48,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:48,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:48,350 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 23:41:48,370 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:48,371 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-07-23 23:41:48,371 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 23:41:48,371 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 23:41:48,372 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 23:41:48,372 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 33 states. [2018-07-23 23:41:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:48,498 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-07-23 23:41:48,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-23 23:41:48,499 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 94 [2018-07-23 23:41:48,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:48,500 INFO L225 Difference]: With dead ends: 103 [2018-07-23 23:41:48,500 INFO L226 Difference]: Without dead ends: 99 [2018-07-23 23:41:48,503 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=502, Invalid=620, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 23:41:48,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-07-23 23:41:48,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2018-07-23 23:41:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 23:41:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-07-23 23:41:48,507 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 94 [2018-07-23 23:41:48,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:48,507 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-07-23 23:41:48,507 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 23:41:48,507 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-07-23 23:41:48,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-07-23 23:41:48,508 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:48,508 INFO L353 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:48,508 INFO L414 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:48,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1099839344, now seen corresponding path program 30 times [2018-07-23 23:41:48,509 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:48,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:48,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:48,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:48,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:49,775 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 23:41:49,776 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:49,776 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 23:41:49,783 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:41:49,848 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-07-23 23:41:49,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:49,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:49,866 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 23:41:49,886 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:49,887 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-07-23 23:41:49,887 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 23:41:49,887 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 23:41:49,888 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 23:41:49,888 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 34 states. [2018-07-23 23:41:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:49,986 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-07-23 23:41:49,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 23:41:49,987 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2018-07-23 23:41:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:49,988 INFO L225 Difference]: With dead ends: 106 [2018-07-23 23:41:49,988 INFO L226 Difference]: Without dead ends: 102 [2018-07-23 23:41:49,989 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=534, Invalid=656, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 23:41:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-07-23 23:41:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2018-07-23 23:41:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-07-23 23:41:49,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-07-23 23:41:49,993 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 97 [2018-07-23 23:41:49,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:49,993 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-07-23 23:41:49,993 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 23:41:49,993 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-07-23 23:41:49,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-07-23 23:41:49,994 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:49,994 INFO L353 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:49,994 INFO L414 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:49,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1659951541, now seen corresponding path program 31 times [2018-07-23 23:41:49,995 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:49,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:49,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:49,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:49,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:51,551 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 23:41:51,551 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:51,551 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 23:41:51,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:51,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:51,631 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 23:41:51,661 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:51,662 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-07-23 23:41:51,662 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 23:41:51,662 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 23:41:51,663 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 23:41:51,663 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 35 states. [2018-07-23 23:41:51,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:51,812 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-07-23 23:41:51,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 23:41:51,813 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 100 [2018-07-23 23:41:51,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:51,814 INFO L225 Difference]: With dead ends: 109 [2018-07-23 23:41:51,814 INFO L226 Difference]: Without dead ends: 105 [2018-07-23 23:41:51,815 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=567, Invalid=693, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 23:41:51,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-07-23 23:41:51,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2018-07-23 23:41:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-07-23 23:41:51,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-07-23 23:41:51,819 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 100 [2018-07-23 23:41:51,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:51,819 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-07-23 23:41:51,819 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 23:41:51,819 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-07-23 23:41:51,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-07-23 23:41:51,820 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:51,820 INFO L353 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:51,820 INFO L414 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:51,820 INFO L82 PathProgramCache]: Analyzing trace with hash -2014467408, now seen corresponding path program 32 times [2018-07-23 23:41:51,820 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:51,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:51,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:51,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:51,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:52,652 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 23:41:52,652 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:52,652 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 23:41:52,659 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:41:52,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:41:52,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:52,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:52,732 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 23:41:52,759 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:52,759 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-07-23 23:41:52,759 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 23:41:52,760 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 23:41:52,760 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 23:41:52,760 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 36 states. [2018-07-23 23:41:52,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:52,882 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-07-23 23:41:52,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 23:41:52,882 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 103 [2018-07-23 23:41:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:52,883 INFO L225 Difference]: With dead ends: 112 [2018-07-23 23:41:52,883 INFO L226 Difference]: Without dead ends: 108 [2018-07-23 23:41:52,884 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=601, Invalid=731, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 23:41:52,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-07-23 23:41:52,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2018-07-23 23:41:52,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 23:41:52,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-07-23 23:41:52,888 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 103 [2018-07-23 23:41:52,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:52,888 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-07-23 23:41:52,888 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 23:41:52,888 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-07-23 23:41:52,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-07-23 23:41:52,889 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:52,889 INFO L353 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:52,889 INFO L414 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:52,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2072080341, now seen corresponding path program 33 times [2018-07-23 23:41:52,890 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:52,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:52,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:52,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:52,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:53,878 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 23:41:53,879 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:53,879 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 23:41:53,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:41:53,959 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-07-23 23:41:53,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:53,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:53,979 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 23:41:53,999 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:53,999 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-07-23 23:41:53,999 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 23:41:53,999 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 23:41:54,000 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 23:41:54,000 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 37 states. [2018-07-23 23:41:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:54,123 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-07-23 23:41:54,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-23 23:41:54,124 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 106 [2018-07-23 23:41:54,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:54,125 INFO L225 Difference]: With dead ends: 115 [2018-07-23 23:41:54,125 INFO L226 Difference]: Without dead ends: 111 [2018-07-23 23:41:54,126 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=636, Invalid=770, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 23:41:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-07-23 23:41:54,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-07-23 23:41:54,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-07-23 23:41:54,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-07-23 23:41:54,130 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 106 [2018-07-23 23:41:54,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:54,130 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-07-23 23:41:54,130 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 23:41:54,130 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-07-23 23:41:54,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-07-23 23:41:54,130 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:54,131 INFO L353 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:54,131 INFO L414 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:54,131 INFO L82 PathProgramCache]: Analyzing trace with hash -432048944, now seen corresponding path program 34 times [2018-07-23 23:41:54,131 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:54,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:54,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:54,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:54,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:54,710 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 23:41:54,710 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:54,710 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 23:41:54,717 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:41:54,774 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:41:54,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:54,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:54,799 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 23:41:54,826 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:54,827 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-07-23 23:41:54,827 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 23:41:54,827 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 23:41:54,828 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 23:41:54,829 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 38 states. [2018-07-23 23:41:54,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:54,982 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-07-23 23:41:54,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 23:41:54,982 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 109 [2018-07-23 23:41:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:54,984 INFO L225 Difference]: With dead ends: 118 [2018-07-23 23:41:54,984 INFO L226 Difference]: Without dead ends: 114 [2018-07-23 23:41:54,985 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=672, Invalid=810, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 23:41:54,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-07-23 23:41:54,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-07-23 23:41:54,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-07-23 23:41:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-07-23 23:41:54,987 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 109 [2018-07-23 23:41:54,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:54,988 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-07-23 23:41:54,988 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 23:41:54,988 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-07-23 23:41:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-07-23 23:41:54,988 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:54,989 INFO L353 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:54,989 INFO L414 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:54,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1804660213, now seen corresponding path program 35 times [2018-07-23 23:41:54,989 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:54,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:54,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:54,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:54,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:55,672 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 23:41:55,672 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:55,672 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 23:41:55,679 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:41:55,755 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-07-23 23:41:55,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:55,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:55,782 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 23:41:55,813 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:55,813 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-07-23 23:41:55,813 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 23:41:55,814 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 23:41:55,814 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 23:41:55,815 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 39 states. [2018-07-23 23:41:57,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:57,172 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-07-23 23:41:57,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 23:41:57,172 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 112 [2018-07-23 23:41:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:57,173 INFO L225 Difference]: With dead ends: 121 [2018-07-23 23:41:57,173 INFO L226 Difference]: Without dead ends: 117 [2018-07-23 23:41:57,174 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=709, Invalid=851, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 23:41:57,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-07-23 23:41:57,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2018-07-23 23:41:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 23:41:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-07-23 23:41:57,177 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 112 [2018-07-23 23:41:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:57,178 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-07-23 23:41:57,178 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 23:41:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-07-23 23:41:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-07-23 23:41:57,178 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:57,179 INFO L353 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:57,179 INFO L414 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:57,179 INFO L82 PathProgramCache]: Analyzing trace with hash -883349776, now seen corresponding path program 36 times [2018-07-23 23:41:57,179 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:57,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:57,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:57,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:57,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:57,936 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 23:41:57,936 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:57,937 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 23:41:57,946 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:41:58,024 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-07-23 23:41:58,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:58,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:58,051 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 23:41:58,082 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:58,083 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-07-23 23:41:58,083 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 23:41:58,083 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 23:41:58,084 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 23:41:58,084 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 40 states. [2018-07-23 23:41:58,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:58,197 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-07-23 23:41:58,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-23 23:41:58,198 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 115 [2018-07-23 23:41:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:58,199 INFO L225 Difference]: With dead ends: 124 [2018-07-23 23:41:58,199 INFO L226 Difference]: Without dead ends: 120 [2018-07-23 23:41:58,200 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=747, Invalid=893, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:41:58,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-07-23 23:41:58,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2018-07-23 23:41:58,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-07-23 23:41:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-07-23 23:41:58,205 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 115 [2018-07-23 23:41:58,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:58,205 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-07-23 23:41:58,205 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 23:41:58,206 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-07-23 23:41:58,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-07-23 23:41:58,206 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:58,206 INFO L353 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:58,206 INFO L414 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:58,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1034857451, now seen corresponding path program 37 times [2018-07-23 23:41:58,207 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:58,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:58,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:58,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:58,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:59,091 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 23:41:59,091 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:59,092 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 23:41:59,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:59,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:59,190 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 23:41:59,221 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:59,222 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-07-23 23:41:59,222 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 23:41:59,222 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 23:41:59,223 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:41:59,223 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 41 states. [2018-07-23 23:42:00,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:00,341 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-07-23 23:42:00,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 23:42:00,343 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 118 [2018-07-23 23:42:00,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:00,344 INFO L225 Difference]: With dead ends: 127 [2018-07-23 23:42:00,344 INFO L226 Difference]: Without dead ends: 123 [2018-07-23 23:42:00,345 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=786, Invalid=936, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 23:42:00,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-07-23 23:42:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2018-07-23 23:42:00,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-07-23 23:42:00,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-07-23 23:42:00,349 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 118 [2018-07-23 23:42:00,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:00,349 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-07-23 23:42:00,349 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 23:42:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-07-23 23:42:00,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-07-23 23:42:00,350 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:00,350 INFO L353 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:00,350 INFO L414 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:00,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1806483728, now seen corresponding path program 38 times [2018-07-23 23:42:00,350 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:00,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:00,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:00,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:42:00,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:01,458 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 23:42:01,459 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:01,459 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 23:42:01,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:42:01,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:42:01,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:01,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:01,561 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 23:42:01,583 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:01,584 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-07-23 23:42:01,584 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 23:42:01,584 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 23:42:01,585 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 23:42:01,585 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 42 states. [2018-07-23 23:42:01,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:01,745 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-07-23 23:42:01,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 23:42:01,745 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 121 [2018-07-23 23:42:01,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:01,746 INFO L225 Difference]: With dead ends: 130 [2018-07-23 23:42:01,746 INFO L226 Difference]: Without dead ends: 126 [2018-07-23 23:42:01,747 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=826, Invalid=980, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 23:42:01,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-07-23 23:42:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2018-07-23 23:42:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-23 23:42:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-07-23 23:42:01,751 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 121 [2018-07-23 23:42:01,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:01,751 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-07-23 23:42:01,751 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 23:42:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-07-23 23:42:01,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-07-23 23:42:01,752 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:01,752 INFO L353 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:01,752 INFO L414 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:01,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1635033653, now seen corresponding path program 39 times [2018-07-23 23:42:01,753 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:01,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:01,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:01,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:01,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:04,026 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 23:42:04,026 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:04,026 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 23:42:04,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:42:04,128 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-07-23 23:42:04,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:04,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:04,153 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 23:42:04,175 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:04,175 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-07-23 23:42:04,175 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 23:42:04,176 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 23:42:04,176 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 23:42:04,176 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 43 states. [2018-07-23 23:42:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:05,269 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-07-23 23:42:05,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-23 23:42:05,269 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 124 [2018-07-23 23:42:05,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:05,270 INFO L225 Difference]: With dead ends: 133 [2018-07-23 23:42:05,270 INFO L226 Difference]: Without dead ends: 129 [2018-07-23 23:42:05,271 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=867, Invalid=1025, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:42:05,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-07-23 23:42:05,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2018-07-23 23:42:05,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-07-23 23:42:05,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-07-23 23:42:05,275 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 124 [2018-07-23 23:42:05,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:05,275 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-07-23 23:42:05,275 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 23:42:05,275 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-07-23 23:42:05,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-07-23 23:42:05,276 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:05,276 INFO L353 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:05,276 INFO L414 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:05,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1579959088, now seen corresponding path program 40 times [2018-07-23 23:42:05,277 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:05,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:05,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:05,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:05,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:06,376 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 23:42:06,376 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:06,376 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 23:42:06,383 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:42:06,463 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:42:06,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:06,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:06,492 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 23:42:06,513 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:06,513 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-07-23 23:42:06,513 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 23:42:06,514 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 23:42:06,514 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:42:06,514 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 44 states. [2018-07-23 23:42:06,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:06,712 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-07-23 23:42:06,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 23:42:06,713 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 127 [2018-07-23 23:42:06,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:06,714 INFO L225 Difference]: With dead ends: 136 [2018-07-23 23:42:06,714 INFO L226 Difference]: Without dead ends: 132 [2018-07-23 23:42:06,716 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=909, Invalid=1071, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 23:42:06,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-07-23 23:42:06,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2018-07-23 23:42:06,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-07-23 23:42:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-07-23 23:42:06,719 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 127 [2018-07-23 23:42:06,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:06,720 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-07-23 23:42:06,720 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 23:42:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-07-23 23:42:06,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-07-23 23:42:06,720 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:06,721 INFO L353 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:06,721 INFO L414 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:06,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1658005419, now seen corresponding path program 41 times [2018-07-23 23:42:06,721 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:06,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:06,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:06,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:06,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:09,408 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 23:42:09,408 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:09,408 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 23:42:09,416 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:42:09,686 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-07-23 23:42:09,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:09,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:09,715 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 23:42:09,744 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:09,744 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-07-23 23:42:09,745 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 23:42:09,745 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 23:42:09,746 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 23:42:09,746 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 45 states. [2018-07-23 23:42:09,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:09,912 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-07-23 23:42:09,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-23 23:42:09,912 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 130 [2018-07-23 23:42:09,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:09,913 INFO L225 Difference]: With dead ends: 139 [2018-07-23 23:42:09,913 INFO L226 Difference]: Without dead ends: 135 [2018-07-23 23:42:09,914 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=952, Invalid=1118, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 23:42:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-07-23 23:42:09,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2018-07-23 23:42:09,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-07-23 23:42:09,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-07-23 23:42:09,917 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 130 [2018-07-23 23:42:09,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:09,918 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-07-23 23:42:09,918 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 23:42:09,918 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-07-23 23:42:09,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-07-23 23:42:09,919 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:09,919 INFO L353 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:09,919 INFO L414 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:09,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1136022192, now seen corresponding path program 42 times [2018-07-23 23:42:09,919 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:09,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:09,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:09,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:09,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:10,769 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 23:42:10,769 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:10,769 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 23:42:10,777 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:42:10,869 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-07-23 23:42:10,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:10,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:10,899 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 23:42:10,921 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:10,921 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-07-23 23:42:10,921 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 23:42:10,922 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 23:42:10,922 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 23:42:10,922 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 46 states. [2018-07-23 23:42:11,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:11,017 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-07-23 23:42:11,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 23:42:11,018 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 133 [2018-07-23 23:42:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:11,019 INFO L225 Difference]: With dead ends: 142 [2018-07-23 23:42:11,019 INFO L226 Difference]: Without dead ends: 138 [2018-07-23 23:42:11,019 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=996, Invalid=1166, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 23:42:11,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-07-23 23:42:11,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-07-23 23:42:11,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-07-23 23:42:11,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-07-23 23:42:11,023 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 133 [2018-07-23 23:42:11,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:11,023 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-07-23 23:42:11,024 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 23:42:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-07-23 23:42:11,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-07-23 23:42:11,024 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:11,024 INFO L353 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:11,025 INFO L414 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:11,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1546385013, now seen corresponding path program 43 times [2018-07-23 23:42:11,025 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:11,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:11,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:11,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:11,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:12,094 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 23:42:12,094 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:12,094 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 23:42:12,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:42:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:12,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:12,206 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 23:42:12,227 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:12,227 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-07-23 23:42:12,227 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 23:42:12,228 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 23:42:12,228 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 23:42:12,228 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 47 states. [2018-07-23 23:42:12,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:12,324 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-07-23 23:42:12,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 23:42:12,324 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 136 [2018-07-23 23:42:12,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:12,325 INFO L225 Difference]: With dead ends: 145 [2018-07-23 23:42:12,325 INFO L226 Difference]: Without dead ends: 141 [2018-07-23 23:42:12,326 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1041, Invalid=1215, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 23:42:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-07-23 23:42:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2018-07-23 23:42:12,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-07-23 23:42:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-07-23 23:42:12,330 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 136 [2018-07-23 23:42:12,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:12,330 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-07-23 23:42:12,330 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 23:42:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-07-23 23:42:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-07-23 23:42:12,331 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:12,331 INFO L353 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:12,331 INFO L414 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:12,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1106706288, now seen corresponding path program 44 times [2018-07-23 23:42:12,331 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:12,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:12,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:12,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:42:12,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:13,880 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 23:42:13,881 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:13,881 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 23:42:13,890 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:42:13,967 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:42:13,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:13,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:13,999 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 23:42:14,033 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:14,033 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-07-23 23:42:14,034 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 23:42:14,034 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 23:42:14,034 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 23:42:14,035 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 48 states. [2018-07-23 23:42:14,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:14,208 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-07-23 23:42:14,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 23:42:14,208 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 139 [2018-07-23 23:42:14,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:14,210 INFO L225 Difference]: With dead ends: 148 [2018-07-23 23:42:14,210 INFO L226 Difference]: Without dead ends: 144 [2018-07-23 23:42:14,210 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1087, Invalid=1265, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 23:42:14,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-07-23 23:42:14,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2018-07-23 23:42:14,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-07-23 23:42:14,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-07-23 23:42:14,214 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 139 [2018-07-23 23:42:14,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:14,215 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-07-23 23:42:14,215 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 23:42:14,215 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-07-23 23:42:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-07-23 23:42:14,216 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:14,216 INFO L353 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:14,216 INFO L414 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:14,216 INFO L82 PathProgramCache]: Analyzing trace with hash -933493909, now seen corresponding path program 45 times [2018-07-23 23:42:14,216 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:14,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:14,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:14,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:14,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:15,134 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 23:42:15,134 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:15,134 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 23:42:15,141 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:42:15,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-07-23 23:42:15,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:15,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:15,275 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 23:42:15,306 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:15,307 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-07-23 23:42:15,307 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 23:42:15,307 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 23:42:15,308 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 23:42:15,308 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 49 states. [2018-07-23 23:42:15,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:15,463 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-07-23 23:42:15,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-23 23:42:15,464 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 142 [2018-07-23 23:42:15,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:15,465 INFO L225 Difference]: With dead ends: 151 [2018-07-23 23:42:15,465 INFO L226 Difference]: Without dead ends: 147 [2018-07-23 23:42:15,466 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1134, Invalid=1316, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 23:42:15,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-07-23 23:42:15,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2018-07-23 23:42:15,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-07-23 23:42:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-07-23 23:42:15,469 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 142 [2018-07-23 23:42:15,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:15,470 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-07-23 23:42:15,470 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 23:42:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-07-23 23:42:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-07-23 23:42:15,470 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:15,471 INFO L353 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:15,471 INFO L414 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:15,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1839610256, now seen corresponding path program 46 times [2018-07-23 23:42:15,471 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:15,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:15,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:15,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:15,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:16,634 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 23:42:16,634 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:16,634 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 23:42:16,644 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:42:16,717 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:42:16,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:16,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:16,751 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 23:42:16,781 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:16,782 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-07-23 23:42:16,782 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 23:42:16,783 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 23:42:16,783 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 23:42:16,783 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 50 states. [2018-07-23 23:42:17,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:17,119 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-07-23 23:42:17,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 23:42:17,119 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 145 [2018-07-23 23:42:17,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:17,120 INFO L225 Difference]: With dead ends: 154 [2018-07-23 23:42:17,120 INFO L226 Difference]: Without dead ends: 150 [2018-07-23 23:42:17,121 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1182, Invalid=1368, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 23:42:17,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-07-23 23:42:17,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2018-07-23 23:42:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-07-23 23:42:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-07-23 23:42:17,124 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 145 [2018-07-23 23:42:17,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:17,125 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-07-23 23:42:17,125 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 23:42:17,125 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-07-23 23:42:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-07-23 23:42:17,126 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:17,126 INFO L353 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:17,126 INFO L414 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:17,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1689851211, now seen corresponding path program 47 times [2018-07-23 23:42:17,126 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:17,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:17,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:17,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:17,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:18,314 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 23:42:18,314 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:18,314 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 23:42:18,322 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:42:18,429 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-07-23 23:42:18,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:18,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:18,465 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 23:42:18,500 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:18,501 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-07-23 23:42:18,501 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 23:42:18,502 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 23:42:18,502 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 23:42:18,502 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 51 states. [2018-07-23 23:42:18,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:18,916 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-07-23 23:42:18,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-23 23:42:18,916 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 148 [2018-07-23 23:42:18,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:18,917 INFO L225 Difference]: With dead ends: 157 [2018-07-23 23:42:18,917 INFO L226 Difference]: Without dead ends: 153 [2018-07-23 23:42:18,918 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1231, Invalid=1421, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 23:42:18,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-07-23 23:42:18,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2018-07-23 23:42:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-07-23 23:42:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-07-23 23:42:18,921 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 148 [2018-07-23 23:42:18,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:18,922 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-07-23 23:42:18,922 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 23:42:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-07-23 23:42:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-07-23 23:42:18,923 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:18,923 INFO L353 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:18,923 INFO L414 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:18,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1605805136, now seen corresponding path program 48 times [2018-07-23 23:42:18,923 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:18,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:18,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:18,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:18,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:19,967 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 23:42:19,968 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:19,968 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 23:42:19,976 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:42:20,088 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-07-23 23:42:20,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:20,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:20,122 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 23:42:20,143 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:20,143 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-07-23 23:42:20,144 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 23:42:20,144 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 23:42:20,144 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 23:42:20,145 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 52 states. [2018-07-23 23:42:20,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:20,281 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-07-23 23:42:20,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 23:42:20,281 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 151 [2018-07-23 23:42:20,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:20,282 INFO L225 Difference]: With dead ends: 160 [2018-07-23 23:42:20,282 INFO L226 Difference]: Without dead ends: 156 [2018-07-23 23:42:20,283 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1281, Invalid=1475, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 23:42:20,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-07-23 23:42:20,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2018-07-23 23:42:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-07-23 23:42:20,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-07-23 23:42:20,286 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 151 [2018-07-23 23:42:20,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:20,287 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-07-23 23:42:20,287 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 23:42:20,287 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-07-23 23:42:20,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-07-23 23:42:20,288 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:20,288 INFO L353 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:20,288 INFO L414 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:20,288 INFO L82 PathProgramCache]: Analyzing trace with hash 448347947, now seen corresponding path program 49 times [2018-07-23 23:42:20,288 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:20,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:20,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:20,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:20,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:21,325 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 23:42:21,326 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:21,326 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 23:42:21,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:42:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:21,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:21,443 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 23:42:21,463 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:21,463 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-07-23 23:42:21,463 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 23:42:21,464 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 23:42:21,464 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 23:42:21,464 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 53 states. [2018-07-23 23:42:21,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:21,572 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-07-23 23:42:21,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-23 23:42:21,573 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 154 [2018-07-23 23:42:21,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:21,574 INFO L225 Difference]: With dead ends: 163 [2018-07-23 23:42:21,574 INFO L226 Difference]: Without dead ends: 159 [2018-07-23 23:42:21,575 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1332, Invalid=1530, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 23:42:21,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-07-23 23:42:21,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2018-07-23 23:42:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-07-23 23:42:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-07-23 23:42:21,579 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 154 [2018-07-23 23:42:21,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:21,579 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-07-23 23:42:21,579 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 23:42:21,579 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-07-23 23:42:21,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-07-23 23:42:21,580 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:21,580 INFO L353 BasicCegarLoop]: trace histogram [51, 50, 50, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:21,580 INFO L414 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:21,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1028810192, now seen corresponding path program 50 times [2018-07-23 23:42:21,581 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:21,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:21,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:21,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:42:21,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:22,745 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 23:42:22,746 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:22,746 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 23:42:22,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:42:22,839 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:42:22,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:22,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:22,877 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 23:42:22,906 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:22,906 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-07-23 23:42:22,906 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 23:42:22,907 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 23:42:22,907 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 23:42:22,907 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 54 states. [2018-07-23 23:42:23,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:23,068 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-07-23 23:42:23,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 23:42:23,068 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 157 [2018-07-23 23:42:23,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:23,070 INFO L225 Difference]: With dead ends: 166 [2018-07-23 23:42:23,070 INFO L226 Difference]: Without dead ends: 162 [2018-07-23 23:42:23,070 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1384, Invalid=1586, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 23:42:23,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-07-23 23:42:23,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-07-23 23:42:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-07-23 23:42:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-07-23 23:42:23,074 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 157 [2018-07-23 23:42:23,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:23,075 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-07-23 23:42:23,075 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 23:42:23,075 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-07-23 23:42:23,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-07-23 23:42:23,076 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:23,076 INFO L353 BasicCegarLoop]: trace histogram [52, 51, 51, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:23,076 INFO L414 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:23,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2041217291, now seen corresponding path program 51 times [2018-07-23 23:42:23,076 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:23,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:23,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:23,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:23,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:24,511 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 23:42:24,511 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:24,512 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 23:42:24,519 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:42:24,782 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-07-23 23:42:24,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:24,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:24,823 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 23:42:24,856 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:24,857 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-07-23 23:42:24,857 INFO L450 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-23 23:42:24,858 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-23 23:42:24,858 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 23:42:24,859 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 55 states. [2018-07-23 23:42:25,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:25,154 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-07-23 23:42:25,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-23 23:42:25,154 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 160 [2018-07-23 23:42:25,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:25,155 INFO L225 Difference]: With dead ends: 169 [2018-07-23 23:42:25,155 INFO L226 Difference]: Without dead ends: 165 [2018-07-23 23:42:25,156 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1437, Invalid=1643, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 23:42:25,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-07-23 23:42:25,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2018-07-23 23:42:25,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-07-23 23:42:25,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-07-23 23:42:25,160 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 160 [2018-07-23 23:42:25,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:25,160 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-07-23 23:42:25,160 INFO L472 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-23 23:42:25,160 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-07-23 23:42:25,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-07-23 23:42:25,161 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:25,161 INFO L353 BasicCegarLoop]: trace histogram [53, 52, 52, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:25,162 INFO L414 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:25,162 INFO L82 PathProgramCache]: Analyzing trace with hash -894216208, now seen corresponding path program 52 times [2018-07-23 23:42:25,162 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:25,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:25,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:25,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:25,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:26,596 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 23:42:26,596 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:26,596 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 23:42:26,604 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:42:26,691 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:42:26,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:26,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:26,730 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 23:42:26,761 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:26,762 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-07-23 23:42:26,762 INFO L450 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-23 23:42:26,763 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-23 23:42:26,763 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 23:42:26,763 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 56 states. [2018-07-23 23:42:28,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:28,082 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-07-23 23:42:28,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-23 23:42:28,082 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 163 [2018-07-23 23:42:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:28,083 INFO L225 Difference]: With dead ends: 172 [2018-07-23 23:42:28,083 INFO L226 Difference]: Without dead ends: 168 [2018-07-23 23:42:28,084 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1491, Invalid=1701, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 23:42:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-07-23 23:42:28,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2018-07-23 23:42:28,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-07-23 23:42:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-07-23 23:42:28,087 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 163 [2018-07-23 23:42:28,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:28,087 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-07-23 23:42:28,087 INFO L472 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-23 23:42:28,088 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-07-23 23:42:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-07-23 23:42:28,088 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:28,089 INFO L353 BasicCegarLoop]: trace histogram [54, 53, 53, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:28,089 INFO L414 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:28,089 INFO L82 PathProgramCache]: Analyzing trace with hash -564471061, now seen corresponding path program 53 times [2018-07-23 23:42:28,089 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:28,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:28,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:28,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:28,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:29,644 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 23:42:29,645 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:29,645 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 23:42:29,652 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:42:29,771 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-07-23 23:42:29,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:29,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:29,813 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 23:42:29,845 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:29,845 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-07-23 23:42:29,846 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-23 23:42:29,846 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-23 23:42:29,847 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 23:42:29,847 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 57 states. [2018-07-23 23:42:30,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:30,042 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-07-23 23:42:30,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-07-23 23:42:30,043 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 166 [2018-07-23 23:42:30,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:30,044 INFO L225 Difference]: With dead ends: 175 [2018-07-23 23:42:30,044 INFO L226 Difference]: Without dead ends: 171 [2018-07-23 23:42:30,045 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1546, Invalid=1760, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 23:42:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-07-23 23:42:30,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2018-07-23 23:42:30,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-07-23 23:42:30,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-07-23 23:42:30,048 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 166 [2018-07-23 23:42:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:30,048 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-07-23 23:42:30,048 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-23 23:42:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-07-23 23:42:30,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-07-23 23:42:30,049 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:30,049 INFO L353 BasicCegarLoop]: trace histogram [55, 54, 54, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:30,049 INFO L414 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:30,049 INFO L82 PathProgramCache]: Analyzing trace with hash 282997264, now seen corresponding path program 54 times [2018-07-23 23:42:30,049 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:30,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:30,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:30,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:30,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:31,324 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 23:42:31,325 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:31,325 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 23:42:31,333 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:42:31,459 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-07-23 23:42:31,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:31,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:31,499 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 23:42:31,532 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:31,532 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-07-23 23:42:31,533 INFO L450 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-23 23:42:31,534 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-23 23:42:31,534 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 23:42:31,534 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 58 states. [2018-07-23 23:42:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:31,770 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-07-23 23:42:31,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-23 23:42:31,771 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 169 [2018-07-23 23:42:31,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:31,772 INFO L225 Difference]: With dead ends: 178 [2018-07-23 23:42:31,772 INFO L226 Difference]: Without dead ends: 174 [2018-07-23 23:42:31,773 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1602, Invalid=1820, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 23:42:31,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-07-23 23:42:31,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2018-07-23 23:42:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-07-23 23:42:31,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-07-23 23:42:31,776 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 169 [2018-07-23 23:42:31,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:31,777 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-07-23 23:42:31,777 INFO L472 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-23 23:42:31,777 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-07-23 23:42:31,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-07-23 23:42:31,777 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:31,778 INFO L353 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:31,778 INFO L414 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:31,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1394101451, now seen corresponding path program 55 times [2018-07-23 23:42:31,778 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:31,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:31,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:31,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:31,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:33,252 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 23:42:33,252 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:33,253 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 23:42:33,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:42:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:33,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:33,381 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 23:42:33,401 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:33,402 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-07-23 23:42:33,402 INFO L450 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-07-23 23:42:33,402 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-07-23 23:42:33,403 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 23:42:33,403 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 59 states. [2018-07-23 23:42:33,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:33,528 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-07-23 23:42:33,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 23:42:33,529 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 172 [2018-07-23 23:42:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:33,530 INFO L225 Difference]: With dead ends: 181 [2018-07-23 23:42:33,530 INFO L226 Difference]: Without dead ends: 177 [2018-07-23 23:42:33,531 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1659, Invalid=1881, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 23:42:33,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-07-23 23:42:33,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2018-07-23 23:42:33,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-07-23 23:42:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-07-23 23:42:33,535 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 172 [2018-07-23 23:42:33,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:33,535 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-07-23 23:42:33,535 INFO L472 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-07-23 23:42:33,536 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-07-23 23:42:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-07-23 23:42:33,536 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:33,537 INFO L353 BasicCegarLoop]: trace histogram [57, 56, 56, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:33,537 INFO L414 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:33,537 INFO L82 PathProgramCache]: Analyzing trace with hash 985986096, now seen corresponding path program 56 times [2018-07-23 23:42:33,537 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:33,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:33,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:33,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:42:33,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:35,087 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 23:42:35,087 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:35,088 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 23:42:35,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:42:35,189 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:42:35,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:35,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:35,233 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 23:42:35,267 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:35,268 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-07-23 23:42:35,268 INFO L450 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-23 23:42:35,269 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-23 23:42:35,269 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 23:42:35,269 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 60 states. [2018-07-23 23:42:35,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:35,604 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2018-07-23 23:42:35,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-23 23:42:35,605 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 175 [2018-07-23 23:42:35,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:35,606 INFO L225 Difference]: With dead ends: 184 [2018-07-23 23:42:35,606 INFO L226 Difference]: Without dead ends: 180 [2018-07-23 23:42:35,607 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1717, Invalid=1943, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 23:42:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-07-23 23:42:35,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2018-07-23 23:42:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-07-23 23:42:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-07-23 23:42:35,610 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 175 [2018-07-23 23:42:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:35,611 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-07-23 23:42:35,611 INFO L472 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-23 23:42:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-07-23 23:42:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-07-23 23:42:35,612 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:35,612 INFO L353 BasicCegarLoop]: trace histogram [58, 57, 57, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:35,612 INFO L414 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:35,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1873860267, now seen corresponding path program 57 times [2018-07-23 23:42:35,612 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:35,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:35,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:35,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:35,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:37,142 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 23:42:37,142 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:37,142 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:42:37,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:42:37,292 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-07-23 23:42:37,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:37,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:37,333 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 23:42:37,354 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:37,354 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-07-23 23:42:37,354 INFO L450 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-23 23:42:37,355 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-23 23:42:37,355 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 23:42:37,355 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 61 states. [2018-07-23 23:42:37,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:37,521 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-07-23 23:42:37,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-07-23 23:42:37,521 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 178 [2018-07-23 23:42:37,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:37,522 INFO L225 Difference]: With dead ends: 187 [2018-07-23 23:42:37,522 INFO L226 Difference]: Without dead ends: 183 [2018-07-23 23:42:37,523 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1776, Invalid=2006, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 23:42:37,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-07-23 23:42:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2018-07-23 23:42:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-07-23 23:42:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-07-23 23:42:37,526 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 178 [2018-07-23 23:42:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:37,526 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-07-23 23:42:37,526 INFO L472 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-23 23:42:37,526 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-07-23 23:42:37,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-07-23 23:42:37,527 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:37,527 INFO L353 BasicCegarLoop]: trace histogram [59, 58, 58, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:37,528 INFO L414 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:37,528 INFO L82 PathProgramCache]: Analyzing trace with hash -170287536, now seen corresponding path program 58 times [2018-07-23 23:42:37,528 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:37,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:37,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:37,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:37,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:38,880 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 23:42:38,880 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:38,880 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:42:38,889 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:42:38,989 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:42:38,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:38,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:39,034 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 23:42:39,057 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:39,058 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-07-23 23:42:39,058 INFO L450 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-23 23:42:39,058 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-23 23:42:39,059 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 23:42:39,059 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 62 states. [2018-07-23 23:42:39,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:39,221 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2018-07-23 23:42:39,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 23:42:39,222 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 181 [2018-07-23 23:42:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:39,223 INFO L225 Difference]: With dead ends: 190 [2018-07-23 23:42:39,223 INFO L226 Difference]: Without dead ends: 186 [2018-07-23 23:42:39,224 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1836, Invalid=2070, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 23:42:39,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-07-23 23:42:39,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-07-23 23:42:39,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-07-23 23:42:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-07-23 23:42:39,228 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 181 [2018-07-23 23:42:39,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:39,228 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-07-23 23:42:39,228 INFO L472 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-23 23:42:39,228 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-07-23 23:42:39,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-07-23 23:42:39,229 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:39,229 INFO L353 BasicCegarLoop]: trace histogram [60, 59, 59, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:39,229 INFO L414 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:39,230 INFO L82 PathProgramCache]: Analyzing trace with hash 963803275, now seen corresponding path program 59 times [2018-07-23 23:42:39,230 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:39,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:39,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:39,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:39,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:40,848 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 23:42:40,848 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:40,848 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 23:42:40,855 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:42:40,999 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-07-23 23:42:40,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:41,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:41,058 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 23:42:41,078 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:41,078 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-07-23 23:42:41,079 INFO L450 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-23 23:42:41,079 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-23 23:42:41,079 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 23:42:41,079 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 63 states. [2018-07-23 23:42:41,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:41,268 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-07-23 23:42:41,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-23 23:42:41,268 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 184 [2018-07-23 23:42:41,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:41,269 INFO L225 Difference]: With dead ends: 193 [2018-07-23 23:42:41,269 INFO L226 Difference]: Without dead ends: 189 [2018-07-23 23:42:41,270 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1897, Invalid=2135, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 23:42:41,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-07-23 23:42:41,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2018-07-23 23:42:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-07-23 23:42:41,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-07-23 23:42:41,273 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 184 [2018-07-23 23:42:41,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:41,273 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-07-23 23:42:41,273 INFO L472 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-23 23:42:41,273 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-07-23 23:42:41,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-07-23 23:42:41,274 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:41,274 INFO L353 BasicCegarLoop]: trace histogram [61, 60, 60, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:41,274 INFO L414 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:41,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1844563856, now seen corresponding path program 60 times [2018-07-23 23:42:41,274 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:41,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:41,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:41,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:41,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:42,743 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 23:42:42,743 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:42,743 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 23:42:42,752 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:42:42,900 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-07-23 23:42:42,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:42,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:42,936 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 23:42:42,957 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:42,957 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-07-23 23:42:42,957 INFO L450 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-23 23:42:42,958 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-23 23:42:42,958 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 23:42:42,958 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 64 states. [2018-07-23 23:42:43,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:43,146 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2018-07-23 23:42:43,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 23:42:43,147 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 187 [2018-07-23 23:42:43,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:43,148 INFO L225 Difference]: With dead ends: 196 [2018-07-23 23:42:43,148 INFO L226 Difference]: Without dead ends: 192 [2018-07-23 23:42:43,149 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1959, Invalid=2201, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 23:42:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-07-23 23:42:43,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2018-07-23 23:42:43,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-07-23 23:42:43,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-07-23 23:42:43,153 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 187 [2018-07-23 23:42:43,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:43,153 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-07-23 23:42:43,153 INFO L472 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-23 23:42:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-07-23 23:42:43,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-07-23 23:42:43,154 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:43,154 INFO L353 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:43,154 INFO L414 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:43,154 INFO L82 PathProgramCache]: Analyzing trace with hash 53162603, now seen corresponding path program 61 times [2018-07-23 23:42:43,155 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:43,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:43,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:43,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:43,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:45,118 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 23:42:45,119 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:45,119 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 23:42:45,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:42:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:45,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:45,256 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 23:42:45,278 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:45,279 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-07-23 23:42:45,279 INFO L450 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-23 23:42:45,280 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-23 23:42:45,280 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 23:42:45,280 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 65 states. [2018-07-23 23:42:45,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:45,435 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-07-23 23:42:45,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-23 23:42:45,435 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 190 [2018-07-23 23:42:45,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:45,436 INFO L225 Difference]: With dead ends: 199 [2018-07-23 23:42:45,436 INFO L226 Difference]: Without dead ends: 195 [2018-07-23 23:42:45,437 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2022, Invalid=2268, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 23:42:45,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-07-23 23:42:45,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2018-07-23 23:42:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-07-23 23:42:45,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-07-23 23:42:45,440 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 190 [2018-07-23 23:42:45,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:45,441 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-07-23 23:42:45,441 INFO L472 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-23 23:42:45,441 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-07-23 23:42:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-07-23 23:42:45,441 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:45,442 INFO L353 BasicCegarLoop]: trace histogram [63, 62, 62, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:45,442 INFO L414 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:45,442 INFO L82 PathProgramCache]: Analyzing trace with hash 567585424, now seen corresponding path program 62 times [2018-07-23 23:42:45,442 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:45,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:45,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:45,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:42:45,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:47,100 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 23:42:47,100 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:47,100 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:42:47,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:42:47,211 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:42:47,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:47,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:47,256 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 23:42:47,277 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:47,277 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-07-23 23:42:47,278 INFO L450 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-23 23:42:47,278 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-23 23:42:47,278 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 23:42:47,279 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 66 states. [2018-07-23 23:42:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:47,436 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-07-23 23:42:47,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-23 23:42:47,436 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 193 [2018-07-23 23:42:47,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:47,437 INFO L225 Difference]: With dead ends: 202 [2018-07-23 23:42:47,437 INFO L226 Difference]: Without dead ends: 198 [2018-07-23 23:42:47,438 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2086, Invalid=2336, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 23:42:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-07-23 23:42:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2018-07-23 23:42:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-07-23 23:42:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-07-23 23:42:47,442 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 193 [2018-07-23 23:42:47,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:47,443 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-07-23 23:42:47,443 INFO L472 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-23 23:42:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-07-23 23:42:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-07-23 23:42:47,444 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:47,444 INFO L353 BasicCegarLoop]: trace histogram [64, 63, 63, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:47,444 INFO L414 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:47,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1294533707, now seen corresponding path program 63 times [2018-07-23 23:42:47,445 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:47,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:47,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:47,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:47,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:49,023 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 23:42:49,023 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:49,024 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 23:42:49,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:42:49,190 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-07-23 23:42:49,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:49,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:49,239 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 23:42:49,263 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:49,263 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-07-23 23:42:49,263 INFO L450 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-07-23 23:42:49,264 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-07-23 23:42:49,264 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 23:42:49,264 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 67 states. [2018-07-23 23:42:49,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:49,493 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-07-23 23:42:49,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-07-23 23:42:49,493 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 196 [2018-07-23 23:42:49,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:49,494 INFO L225 Difference]: With dead ends: 205 [2018-07-23 23:42:49,494 INFO L226 Difference]: Without dead ends: 201 [2018-07-23 23:42:49,494 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2151, Invalid=2405, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 23:42:49,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-07-23 23:42:49,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2018-07-23 23:42:49,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-07-23 23:42:49,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2018-07-23 23:42:49,498 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 196 [2018-07-23 23:42:49,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:49,498 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2018-07-23 23:42:49,498 INFO L472 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-07-23 23:42:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2018-07-23 23:42:49,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-07-23 23:42:49,499 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:49,499 INFO L353 BasicCegarLoop]: trace histogram [65, 64, 64, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:49,500 INFO L414 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:49,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1709241168, now seen corresponding path program 64 times [2018-07-23 23:42:49,500 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:49,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:49,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:49,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:49,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:51,415 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 23:42:51,416 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:51,416 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 23:42:51,424 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:42:51,530 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:42:51,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:51,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:51,583 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 23:42:51,614 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:51,615 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-07-23 23:42:51,615 INFO L450 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-23 23:42:51,616 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-23 23:42:51,616 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 23:42:51,616 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand 68 states. [2018-07-23 23:42:51,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:51,839 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2018-07-23 23:42:51,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-23 23:42:51,839 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 199 [2018-07-23 23:42:51,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:51,840 INFO L225 Difference]: With dead ends: 208 [2018-07-23 23:42:51,840 INFO L226 Difference]: Without dead ends: 204 [2018-07-23 23:42:51,841 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2217, Invalid=2475, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 23:42:51,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-07-23 23:42:51,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2018-07-23 23:42:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-07-23 23:42:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-07-23 23:42:51,844 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 199 [2018-07-23 23:42:51,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:51,844 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-07-23 23:42:51,844 INFO L472 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-23 23:42:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-07-23 23:42:51,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-07-23 23:42:51,845 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:51,845 INFO L353 BasicCegarLoop]: trace histogram [66, 65, 65, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:51,845 INFO L414 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:51,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1522930133, now seen corresponding path program 65 times [2018-07-23 23:42:51,846 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:51,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:51,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:51,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:51,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:53,501 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 23:42:53,502 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:53,502 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 23:42:53,509 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:42:53,671 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-07-23 23:42:53,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:53,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:53,719 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 23:42:53,741 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:53,741 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-07-23 23:42:53,741 INFO L450 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-23 23:42:53,742 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-23 23:42:53,742 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 23:42:53,742 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 69 states. [2018-07-23 23:42:53,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:53,891 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-07-23 23:42:53,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-23 23:42:53,891 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 202 [2018-07-23 23:42:53,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:53,893 INFO L225 Difference]: With dead ends: 211 [2018-07-23 23:42:53,893 INFO L226 Difference]: Without dead ends: 207 [2018-07-23 23:42:53,893 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2284, Invalid=2546, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 23:42:53,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-07-23 23:42:53,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2018-07-23 23:42:53,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-07-23 23:42:53,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2018-07-23 23:42:53,897 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 202 [2018-07-23 23:42:53,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:53,897 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2018-07-23 23:42:53,897 INFO L472 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-23 23:42:53,897 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2018-07-23 23:42:53,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-07-23 23:42:53,898 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:53,898 INFO L353 BasicCegarLoop]: trace histogram [67, 66, 66, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:53,898 INFO L414 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:53,898 INFO L82 PathProgramCache]: Analyzing trace with hash -228632880, now seen corresponding path program 66 times [2018-07-23 23:42:53,898 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:53,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:53,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:53,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:53,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:56,029 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 23:42:56,029 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:56,029 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 23:42:56,037 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:42:56,204 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-07-23 23:42:56,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:42:56,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:56,245 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 23:42:56,266 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:56,266 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-07-23 23:42:56,266 INFO L450 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-23 23:42:56,267 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-23 23:42:56,267 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 23:42:56,267 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 70 states. [2018-07-23 23:42:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:56,475 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2018-07-23 23:42:56,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-23 23:42:56,475 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 205 [2018-07-23 23:42:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:56,476 INFO L225 Difference]: With dead ends: 214 [2018-07-23 23:42:56,476 INFO L226 Difference]: Without dead ends: 210 [2018-07-23 23:42:56,476 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2352, Invalid=2618, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 23:42:56,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-07-23 23:42:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2018-07-23 23:42:56,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-07-23 23:42:56,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-07-23 23:42:56,480 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 205 [2018-07-23 23:42:56,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:56,480 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-07-23 23:42:56,480 INFO L472 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-23 23:42:56,480 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-07-23 23:42:56,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-07-23 23:42:56,481 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:56,481 INFO L353 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:56,481 INFO L414 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:56,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2035552245, now seen corresponding path program 67 times [2018-07-23 23:42:56,481 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:56,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:56,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:56,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:42:56,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:58,262 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 23:42:58,262 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:42:58,263 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 23:42:58,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:42:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:42:58,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:42:58,424 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 23:42:58,444 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:42:58,445 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-07-23 23:42:58,445 INFO L450 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-07-23 23:42:58,446 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-07-23 23:42:58,446 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 23:42:58,446 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 71 states. [2018-07-23 23:42:58,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:42:58,720 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-07-23 23:42:58,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-23 23:42:58,720 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 208 [2018-07-23 23:42:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:42:58,721 INFO L225 Difference]: With dead ends: 217 [2018-07-23 23:42:58,721 INFO L226 Difference]: Without dead ends: 213 [2018-07-23 23:42:58,721 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2421, Invalid=2691, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 23:42:58,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-07-23 23:42:58,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2018-07-23 23:42:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-07-23 23:42:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2018-07-23 23:42:58,725 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 208 [2018-07-23 23:42:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:42:58,725 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2018-07-23 23:42:58,726 INFO L472 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-07-23 23:42:58,726 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2018-07-23 23:42:58,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-07-23 23:42:58,727 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:42:58,727 INFO L353 BasicCegarLoop]: trace histogram [69, 68, 68, 1, 1, 1, 1, 1, 1] [2018-07-23 23:42:58,727 INFO L414 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:42:58,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1149733104, now seen corresponding path program 68 times [2018-07-23 23:42:58,727 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:42:58,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:42:58,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:58,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:42:58,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:42:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:01,004 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 23:43:01,005 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:01,005 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 23:43:01,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:43:01,123 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:43:01,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:01,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:01,169 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 23:43:01,190 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:01,190 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-07-23 23:43:01,190 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-23 23:43:01,191 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-23 23:43:01,191 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 23:43:01,191 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 72 states. [2018-07-23 23:43:01,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:01,386 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2018-07-23 23:43:01,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 23:43:01,387 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 211 [2018-07-23 23:43:01,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:01,388 INFO L225 Difference]: With dead ends: 220 [2018-07-23 23:43:01,388 INFO L226 Difference]: Without dead ends: 216 [2018-07-23 23:43:01,389 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2491, Invalid=2765, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 23:43:01,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-07-23 23:43:01,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2018-07-23 23:43:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-07-23 23:43:01,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-07-23 23:43:01,392 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 211 [2018-07-23 23:43:01,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:01,393 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-07-23 23:43:01,393 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-23 23:43:01,393 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-07-23 23:43:01,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-07-23 23:43:01,394 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:01,394 INFO L353 BasicCegarLoop]: trace histogram [70, 69, 69, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:01,394 INFO L414 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:01,395 INFO L82 PathProgramCache]: Analyzing trace with hash 978127339, now seen corresponding path program 69 times [2018-07-23 23:43:01,395 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:01,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:01,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:01,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:01,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:03,267 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 23:43:03,267 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:03,267 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:43:03,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:43:03,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-07-23 23:43:03,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:03,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:03,508 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 23:43:03,529 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:03,530 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-07-23 23:43:03,530 INFO L450 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-07-23 23:43:03,531 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-07-23 23:43:03,531 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 23:43:03,531 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 73 states. [2018-07-23 23:43:03,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:03,729 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-07-23 23:43:03,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-07-23 23:43:03,729 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 214 [2018-07-23 23:43:03,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:03,730 INFO L225 Difference]: With dead ends: 223 [2018-07-23 23:43:03,730 INFO L226 Difference]: Without dead ends: 219 [2018-07-23 23:43:03,730 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2562, Invalid=2840, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 23:43:03,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-07-23 23:43:03,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2018-07-23 23:43:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-07-23 23:43:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-07-23 23:43:03,734 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 214 [2018-07-23 23:43:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:03,734 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-07-23 23:43:03,734 INFO L472 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-07-23 23:43:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-07-23 23:43:03,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-07-23 23:43:03,735 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:03,735 INFO L353 BasicCegarLoop]: trace histogram [71, 70, 70, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:03,735 INFO L414 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:03,735 INFO L82 PathProgramCache]: Analyzing trace with hash -318135536, now seen corresponding path program 70 times [2018-07-23 23:43:03,736 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:03,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:03,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:03,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:03,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:05,984 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 23:43:05,984 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:05,984 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:43:05,991 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:43:06,101 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:43:06,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:06,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:06,155 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 23:43:06,188 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:06,189 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-07-23 23:43:06,189 INFO L450 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-23 23:43:06,190 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-23 23:43:06,190 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 23:43:06,191 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 74 states. [2018-07-23 23:43:06,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:06,564 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2018-07-23 23:43:06,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-23 23:43:06,564 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 217 [2018-07-23 23:43:06,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:06,565 INFO L225 Difference]: With dead ends: 226 [2018-07-23 23:43:06,565 INFO L226 Difference]: Without dead ends: 222 [2018-07-23 23:43:06,565 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2634, Invalid=2916, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 23:43:06,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-07-23 23:43:06,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2018-07-23 23:43:06,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-07-23 23:43:06,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-07-23 23:43:06,569 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 217 [2018-07-23 23:43:06,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:06,569 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-07-23 23:43:06,569 INFO L472 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-23 23:43:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-07-23 23:43:06,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-07-23 23:43:06,570 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:06,570 INFO L353 BasicCegarLoop]: trace histogram [72, 71, 71, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:06,570 INFO L414 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:06,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1234486325, now seen corresponding path program 71 times [2018-07-23 23:43:06,570 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:06,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:06,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:06,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:06,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:08,543 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 23:43:08,543 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:08,543 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 23:43:08,551 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:43:08,733 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-07-23 23:43:08,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:08,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:08,788 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 23:43:08,809 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:08,809 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-07-23 23:43:08,809 INFO L450 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-23 23:43:08,810 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-23 23:43:08,810 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 23:43:08,810 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 75 states. [2018-07-23 23:43:09,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:09,070 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-07-23 23:43:09,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-23 23:43:09,071 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 220 [2018-07-23 23:43:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:09,072 INFO L225 Difference]: With dead ends: 229 [2018-07-23 23:43:09,072 INFO L226 Difference]: Without dead ends: 225 [2018-07-23 23:43:09,072 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2707, Invalid=2993, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 23:43:09,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-07-23 23:43:09,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2018-07-23 23:43:09,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-07-23 23:43:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 224 transitions. [2018-07-23 23:43:09,075 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 224 transitions. Word has length 220 [2018-07-23 23:43:09,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:09,076 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 224 transitions. [2018-07-23 23:43:09,076 INFO L472 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-23 23:43:09,076 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 224 transitions. [2018-07-23 23:43:09,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-07-23 23:43:09,077 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:09,077 INFO L353 BasicCegarLoop]: trace histogram [73, 72, 72, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:09,077 INFO L414 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:09,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1428708048, now seen corresponding path program 72 times [2018-07-23 23:43:09,077 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:09,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:09,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:09,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:09,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:11,365 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 23:43:11,366 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:11,366 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 23:43:11,374 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:43:11,561 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-07-23 23:43:11,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:11,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:11,609 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 23:43:11,629 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:11,629 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-07-23 23:43:11,630 INFO L450 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-23 23:43:11,630 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-23 23:43:11,631 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 23:43:11,631 INFO L87 Difference]: Start difference. First operand 224 states and 224 transitions. Second operand 76 states. [2018-07-23 23:43:11,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:11,810 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2018-07-23 23:43:11,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-23 23:43:11,811 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 223 [2018-07-23 23:43:11,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:11,812 INFO L225 Difference]: With dead ends: 232 [2018-07-23 23:43:11,812 INFO L226 Difference]: Without dead ends: 228 [2018-07-23 23:43:11,813 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2781, Invalid=3071, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 23:43:11,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-07-23 23:43:11,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2018-07-23 23:43:11,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-07-23 23:43:11,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-07-23 23:43:11,817 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 223 [2018-07-23 23:43:11,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:11,817 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-07-23 23:43:11,818 INFO L472 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-23 23:43:11,818 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-07-23 23:43:11,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-07-23 23:43:11,819 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:11,819 INFO L353 BasicCegarLoop]: trace histogram [74, 73, 73, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:11,819 INFO L414 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:11,819 INFO L82 PathProgramCache]: Analyzing trace with hash 2127857067, now seen corresponding path program 73 times [2018-07-23 23:43:11,820 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:11,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:11,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:11,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:11,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:13,925 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 23:43:13,925 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:13,925 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 23:43:13,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:43:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:14,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:14,109 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 23:43:14,129 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:14,130 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-07-23 23:43:14,130 INFO L450 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-07-23 23:43:14,131 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-07-23 23:43:14,131 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 23:43:14,131 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 77 states. [2018-07-23 23:43:14,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:14,417 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-07-23 23:43:14,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-07-23 23:43:14,417 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 226 [2018-07-23 23:43:14,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:14,418 INFO L225 Difference]: With dead ends: 235 [2018-07-23 23:43:14,418 INFO L226 Difference]: Without dead ends: 231 [2018-07-23 23:43:14,419 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2856, Invalid=3150, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 23:43:14,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-07-23 23:43:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2018-07-23 23:43:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-07-23 23:43:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2018-07-23 23:43:14,423 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 226 [2018-07-23 23:43:14,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:14,423 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2018-07-23 23:43:14,423 INFO L472 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-07-23 23:43:14,423 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2018-07-23 23:43:14,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-07-23 23:43:14,424 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:14,424 INFO L353 BasicCegarLoop]: trace histogram [75, 74, 74, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:14,425 INFO L414 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:14,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1083994288, now seen corresponding path program 74 times [2018-07-23 23:43:14,425 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:14,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:14,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:14,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:43:14,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:16,936 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 23:43:16,936 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:16,936 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 23:43:16,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:43:17,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:43:17,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:17,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:17,125 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 23:43:17,146 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:17,146 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-07-23 23:43:17,146 INFO L450 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-23 23:43:17,147 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-23 23:43:17,147 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 23:43:17,147 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand 78 states. [2018-07-23 23:43:17,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:17,402 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2018-07-23 23:43:17,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-23 23:43:17,402 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 229 [2018-07-23 23:43:17,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:17,403 INFO L225 Difference]: With dead ends: 238 [2018-07-23 23:43:17,403 INFO L226 Difference]: Without dead ends: 234 [2018-07-23 23:43:17,403 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2932, Invalid=3230, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 23:43:17,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-07-23 23:43:17,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2018-07-23 23:43:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-07-23 23:43:17,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-07-23 23:43:17,408 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 229 [2018-07-23 23:43:17,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:17,408 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-07-23 23:43:17,408 INFO L472 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-23 23:43:17,408 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-07-23 23:43:17,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-07-23 23:43:17,409 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:17,409 INFO L353 BasicCegarLoop]: trace histogram [76, 75, 75, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:17,410 INFO L414 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:17,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2066290805, now seen corresponding path program 75 times [2018-07-23 23:43:17,410 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:17,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:17,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:17,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:17,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:19,586 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 23:43:19,587 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:19,587 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 23:43:19,594 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:43:19,797 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-07-23 23:43:19,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:19,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:19,862 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 23:43:19,883 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:19,883 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-07-23 23:43:19,884 INFO L450 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-07-23 23:43:19,884 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-07-23 23:43:19,884 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 23:43:19,884 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 79 states. [2018-07-23 23:43:20,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:20,917 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-07-23 23:43:20,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-07-23 23:43:20,918 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 232 [2018-07-23 23:43:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:20,919 INFO L225 Difference]: With dead ends: 241 [2018-07-23 23:43:20,919 INFO L226 Difference]: Without dead ends: 237 [2018-07-23 23:43:20,920 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3009, Invalid=3311, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 23:43:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-07-23 23:43:20,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2018-07-23 23:43:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-07-23 23:43:20,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2018-07-23 23:43:20,923 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 232 [2018-07-23 23:43:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:20,923 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2018-07-23 23:43:20,923 INFO L472 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-07-23 23:43:20,923 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2018-07-23 23:43:20,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-07-23 23:43:20,924 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:20,924 INFO L353 BasicCegarLoop]: trace histogram [77, 76, 76, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:20,924 INFO L414 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:20,924 INFO L82 PathProgramCache]: Analyzing trace with hash 245326192, now seen corresponding path program 76 times [2018-07-23 23:43:20,924 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:20,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:20,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:20,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:20,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:23,230 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 23:43:23,231 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:23,231 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 23:43:23,238 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:43:23,359 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:43:23,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:23,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:23,410 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 23:43:23,430 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:23,431 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-07-23 23:43:23,431 INFO L450 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-23 23:43:23,432 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-23 23:43:23,432 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 23:43:23,432 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 80 states. [2018-07-23 23:43:23,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:23,628 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2018-07-23 23:43:23,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-23 23:43:23,628 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 235 [2018-07-23 23:43:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:23,630 INFO L225 Difference]: With dead ends: 244 [2018-07-23 23:43:23,630 INFO L226 Difference]: Without dead ends: 240 [2018-07-23 23:43:23,630 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3087, Invalid=3393, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 23:43:23,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-07-23 23:43:23,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2018-07-23 23:43:23,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-07-23 23:43:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-07-23 23:43:23,635 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 235 [2018-07-23 23:43:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:23,635 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-07-23 23:43:23,635 INFO L472 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-23 23:43:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-07-23 23:43:23,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-07-23 23:43:23,636 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:23,636 INFO L353 BasicCegarLoop]: trace histogram [78, 77, 77, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:23,637 INFO L414 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:23,637 INFO L82 PathProgramCache]: Analyzing trace with hash 121659755, now seen corresponding path program 77 times [2018-07-23 23:43:23,637 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:23,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:23,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:23,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:23,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:26,331 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 23:43:26,331 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:26,332 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 23:43:26,339 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:43:26,546 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-07-23 23:43:26,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:26,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:26,598 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 23:43:26,619 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:26,619 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-07-23 23:43:26,620 INFO L450 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-23 23:43:26,620 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-23 23:43:26,621 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 23:43:26,621 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 81 states. [2018-07-23 23:43:26,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:26,865 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-07-23 23:43:26,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-07-23 23:43:26,866 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 238 [2018-07-23 23:43:26,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:26,867 INFO L225 Difference]: With dead ends: 247 [2018-07-23 23:43:26,868 INFO L226 Difference]: Without dead ends: 243 [2018-07-23 23:43:26,868 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3166, Invalid=3476, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 23:43:26,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-07-23 23:43:26,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2018-07-23 23:43:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-07-23 23:43:26,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2018-07-23 23:43:26,871 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 238 [2018-07-23 23:43:26,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:26,872 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2018-07-23 23:43:26,872 INFO L472 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-23 23:43:26,872 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2018-07-23 23:43:26,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-07-23 23:43:26,873 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:26,873 INFO L353 BasicCegarLoop]: trace histogram [79, 78, 78, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:26,874 INFO L414 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:26,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1056775056, now seen corresponding path program 78 times [2018-07-23 23:43:26,874 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:26,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:26,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:26,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:26,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:29,251 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 23:43:29,251 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:29,251 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 23:43:29,258 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:43:29,478 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-07-23 23:43:29,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:29,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:29,532 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 23:43:29,553 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:29,553 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-07-23 23:43:29,553 INFO L450 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-23 23:43:29,554 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-23 23:43:29,554 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 23:43:29,554 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 82 states. [2018-07-23 23:43:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:29,885 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2018-07-23 23:43:29,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-23 23:43:29,886 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 241 [2018-07-23 23:43:29,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:29,887 INFO L225 Difference]: With dead ends: 250 [2018-07-23 23:43:29,887 INFO L226 Difference]: Without dead ends: 246 [2018-07-23 23:43:29,887 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3246, Invalid=3560, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 23:43:29,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-07-23 23:43:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2018-07-23 23:43:29,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-07-23 23:43:29,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2018-07-23 23:43:29,891 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 241 [2018-07-23 23:43:29,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:29,891 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2018-07-23 23:43:29,891 INFO L472 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-23 23:43:29,891 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2018-07-23 23:43:29,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-07-23 23:43:29,892 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:29,892 INFO L353 BasicCegarLoop]: trace histogram [80, 79, 79, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:29,892 INFO L414 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:29,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1918825291, now seen corresponding path program 79 times [2018-07-23 23:43:29,892 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:29,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:29,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:29,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:29,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:32,594 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 23:43:32,595 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:32,595 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:43:32,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:43:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:32,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:32,783 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 23:43:32,804 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:32,804 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-07-23 23:43:32,804 INFO L450 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-07-23 23:43:32,805 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-07-23 23:43:32,805 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 23:43:32,805 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 83 states. [2018-07-23 23:43:33,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:33,045 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-07-23 23:43:33,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-07-23 23:43:33,045 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 244 [2018-07-23 23:43:33,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:33,047 INFO L225 Difference]: With dead ends: 253 [2018-07-23 23:43:33,047 INFO L226 Difference]: Without dead ends: 249 [2018-07-23 23:43:33,048 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3327, Invalid=3645, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 23:43:33,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-07-23 23:43:33,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2018-07-23 23:43:33,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-07-23 23:43:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2018-07-23 23:43:33,051 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 244 [2018-07-23 23:43:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:33,051 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2018-07-23 23:43:33,051 INFO L472 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-07-23 23:43:33,051 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2018-07-23 23:43:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-07-23 23:43:33,052 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:33,052 INFO L353 BasicCegarLoop]: trace histogram [81, 80, 80, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:33,052 INFO L414 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:33,053 INFO L82 PathProgramCache]: Analyzing trace with hash -647053904, now seen corresponding path program 80 times [2018-07-23 23:43:33,053 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:33,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:33,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:33,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:43:33,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:35,809 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 23:43:35,810 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:35,810 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 23:43:35,817 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:43:35,949 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:43:35,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:35,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:36,020 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 23:43:36,053 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:36,053 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-07-23 23:43:36,053 INFO L450 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-23 23:43:36,054 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-23 23:43:36,054 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 23:43:36,054 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 84 states. [2018-07-23 23:43:36,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:36,443 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2018-07-23 23:43:36,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-23 23:43:36,443 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 247 [2018-07-23 23:43:36,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:36,444 INFO L225 Difference]: With dead ends: 256 [2018-07-23 23:43:36,444 INFO L226 Difference]: Without dead ends: 252 [2018-07-23 23:43:36,445 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3409, Invalid=3731, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 23:43:36,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-07-23 23:43:36,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2018-07-23 23:43:36,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-07-23 23:43:36,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-07-23 23:43:36,448 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 247 [2018-07-23 23:43:36,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:36,449 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-07-23 23:43:36,449 INFO L472 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-23 23:43:36,449 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-07-23 23:43:36,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-07-23 23:43:36,450 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:36,450 INFO L353 BasicCegarLoop]: trace histogram [82, 81, 81, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:36,450 INFO L414 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:36,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1073782059, now seen corresponding path program 81 times [2018-07-23 23:43:36,451 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:36,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:36,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:36,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:36,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:39,086 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 23:43:39,087 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:39,087 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 23:43:39,094 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:43:39,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-07-23 23:43:39,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:39,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:39,381 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 23:43:39,402 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:39,402 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-07-23 23:43:39,403 INFO L450 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-07-23 23:43:39,403 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-07-23 23:43:39,404 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 23:43:39,404 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 85 states. [2018-07-23 23:43:39,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:39,622 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2018-07-23 23:43:39,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-23 23:43:39,623 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 250 [2018-07-23 23:43:39,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:39,624 INFO L225 Difference]: With dead ends: 259 [2018-07-23 23:43:39,624 INFO L226 Difference]: Without dead ends: 255 [2018-07-23 23:43:39,624 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3492, Invalid=3818, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 23:43:39,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-07-23 23:43:39,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2018-07-23 23:43:39,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-07-23 23:43:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 254 transitions. [2018-07-23 23:43:39,627 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 254 transitions. Word has length 250 [2018-07-23 23:43:39,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:39,627 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 254 transitions. [2018-07-23 23:43:39,628 INFO L472 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-07-23 23:43:39,628 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 254 transitions. [2018-07-23 23:43:39,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-07-23 23:43:39,629 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:39,629 INFO L353 BasicCegarLoop]: trace histogram [83, 82, 82, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:39,629 INFO L414 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:39,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1768310736, now seen corresponding path program 82 times [2018-07-23 23:43:39,629 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:39,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:39,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:39,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:39,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:42,600 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 23:43:42,600 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:42,600 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 23:43:42,607 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:43:42,744 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:43:42,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:42,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:42,809 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 23:43:42,830 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:42,831 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-07-23 23:43:42,831 INFO L450 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-07-23 23:43:42,831 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-07-23 23:43:42,832 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 23:43:42,832 INFO L87 Difference]: Start difference. First operand 254 states and 254 transitions. Second operand 86 states. [2018-07-23 23:43:43,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:43,081 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2018-07-23 23:43:43,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-23 23:43:43,082 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 253 [2018-07-23 23:43:43,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:43,083 INFO L225 Difference]: With dead ends: 262 [2018-07-23 23:43:43,083 INFO L226 Difference]: Without dead ends: 258 [2018-07-23 23:43:43,084 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3576, Invalid=3906, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 23:43:43,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-07-23 23:43:43,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2018-07-23 23:43:43,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-07-23 23:43:43,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2018-07-23 23:43:43,088 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 253 [2018-07-23 23:43:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:43,088 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2018-07-23 23:43:43,088 INFO L472 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-07-23 23:43:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2018-07-23 23:43:43,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-07-23 23:43:43,089 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:43,089 INFO L353 BasicCegarLoop]: trace histogram [84, 83, 83, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:43,089 INFO L414 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:43,089 INFO L82 PathProgramCache]: Analyzing trace with hash -680304885, now seen corresponding path program 83 times [2018-07-23 23:43:43,089 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:43,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:43,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:43,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:43,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:45,748 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 23:43:45,749 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:45,749 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 23:43:45,755 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:43:46,004 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-07-23 23:43:46,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:46,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:46,061 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 23:43:46,082 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:46,082 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-07-23 23:43:46,083 INFO L450 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-07-23 23:43:46,083 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-07-23 23:43:46,083 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 23:43:46,084 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 87 states. [2018-07-23 23:43:46,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:46,446 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-07-23 23:43:46,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-23 23:43:46,446 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 256 [2018-07-23 23:43:46,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:46,448 INFO L225 Difference]: With dead ends: 265 [2018-07-23 23:43:46,448 INFO L226 Difference]: Without dead ends: 261 [2018-07-23 23:43:46,448 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3661, Invalid=3995, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 23:43:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-07-23 23:43:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2018-07-23 23:43:46,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-07-23 23:43:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 260 transitions. [2018-07-23 23:43:46,453 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 260 transitions. Word has length 256 [2018-07-23 23:43:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:46,453 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 260 transitions. [2018-07-23 23:43:46,453 INFO L472 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-07-23 23:43:46,453 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 260 transitions. [2018-07-23 23:43:46,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-07-23 23:43:46,454 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:46,454 INFO L353 BasicCegarLoop]: trace histogram [85, 84, 84, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:46,455 INFO L414 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:46,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1663714832, now seen corresponding path program 84 times [2018-07-23 23:43:46,455 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:46,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:46,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:46,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:46,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:49,219 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 23:43:49,220 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:49,220 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 23:43:49,227 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:43:49,465 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-07-23 23:43:49,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:49,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:49,524 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 23:43:49,546 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:49,546 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-07-23 23:43:49,546 INFO L450 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-07-23 23:43:49,547 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-07-23 23:43:49,547 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 23:43:49,548 INFO L87 Difference]: Start difference. First operand 260 states and 260 transitions. Second operand 88 states. [2018-07-23 23:43:49,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:49,778 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2018-07-23 23:43:49,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-23 23:43:49,779 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 259 [2018-07-23 23:43:49,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:49,781 INFO L225 Difference]: With dead ends: 268 [2018-07-23 23:43:49,781 INFO L226 Difference]: Without dead ends: 264 [2018-07-23 23:43:49,781 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3747, Invalid=4085, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 23:43:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-07-23 23:43:49,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2018-07-23 23:43:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-07-23 23:43:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-07-23 23:43:49,785 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 259 [2018-07-23 23:43:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:49,785 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-07-23 23:43:49,785 INFO L472 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-07-23 23:43:49,786 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-07-23 23:43:49,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-07-23 23:43:49,787 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:49,787 INFO L353 BasicCegarLoop]: trace histogram [86, 85, 85, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:49,787 INFO L414 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:49,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1837447403, now seen corresponding path program 85 times [2018-07-23 23:43:49,787 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:49,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:49,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:49,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:49,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:52,803 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 23:43:52,803 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:52,803 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 23:43:52,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:43:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:52,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:53,013 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 23:43:53,035 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:53,035 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-07-23 23:43:53,036 INFO L450 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-07-23 23:43:53,037 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-07-23 23:43:53,037 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 23:43:53,037 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 89 states. [2018-07-23 23:43:53,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:53,331 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2018-07-23 23:43:53,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-07-23 23:43:53,331 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 262 [2018-07-23 23:43:53,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:53,332 INFO L225 Difference]: With dead ends: 271 [2018-07-23 23:43:53,332 INFO L226 Difference]: Without dead ends: 267 [2018-07-23 23:43:53,333 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3834, Invalid=4176, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 23:43:53,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-07-23 23:43:53,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2018-07-23 23:43:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-07-23 23:43:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 266 transitions. [2018-07-23 23:43:53,336 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 266 transitions. Word has length 262 [2018-07-23 23:43:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:53,336 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 266 transitions. [2018-07-23 23:43:53,336 INFO L472 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-07-23 23:43:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 266 transitions. [2018-07-23 23:43:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-07-23 23:43:53,337 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:53,337 INFO L353 BasicCegarLoop]: trace histogram [87, 86, 86, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:53,338 INFO L414 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:53,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1680806928, now seen corresponding path program 86 times [2018-07-23 23:43:53,338 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:53,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:53,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:53,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:43:53,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:43:56,589 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 23:43:56,589 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:43:56,589 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 23:43:56,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:43:56,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:43:56,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:43:56,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:43:56,805 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 23:43:56,826 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:43:56,826 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-07-23 23:43:56,827 INFO L450 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-23 23:43:56,827 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-23 23:43:56,828 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 23:43:56,828 INFO L87 Difference]: Start difference. First operand 266 states and 266 transitions. Second operand 90 states. [2018-07-23 23:43:57,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:43:57,211 INFO L93 Difference]: Finished difference Result 274 states and 274 transitions. [2018-07-23 23:43:57,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-23 23:43:57,212 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 265 [2018-07-23 23:43:57,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:43:57,213 INFO L225 Difference]: With dead ends: 274 [2018-07-23 23:43:57,213 INFO L226 Difference]: Without dead ends: 270 [2018-07-23 23:43:57,213 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3922, Invalid=4268, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 23:43:57,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-07-23 23:43:57,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2018-07-23 23:43:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-07-23 23:43:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2018-07-23 23:43:57,217 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 265 [2018-07-23 23:43:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:43:57,217 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2018-07-23 23:43:57,217 INFO L472 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-23 23:43:57,218 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2018-07-23 23:43:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-07-23 23:43:57,218 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:43:57,219 INFO L353 BasicCegarLoop]: trace histogram [88, 87, 87, 1, 1, 1, 1, 1, 1] [2018-07-23 23:43:57,219 INFO L414 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:43:57,219 INFO L82 PathProgramCache]: Analyzing trace with hash -461100341, now seen corresponding path program 87 times [2018-07-23 23:43:57,219 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:43:57,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:43:57,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:57,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:43:57,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:43:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:44:00,173 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 23:44:00,174 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:44:00,174 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:44:00,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:44:00,450 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-07-23 23:44:00,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:44:00,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:44:00,513 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 23:44:00,535 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:44:00,535 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-07-23 23:44:00,536 INFO L450 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-07-23 23:44:00,536 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-07-23 23:44:00,537 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 23:44:00,537 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand 91 states. [2018-07-23 23:44:00,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:44:00,791 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-07-23 23:44:00,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-07-23 23:44:00,792 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 268 [2018-07-23 23:44:00,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:44:00,794 INFO L225 Difference]: With dead ends: 277 [2018-07-23 23:44:00,794 INFO L226 Difference]: Without dead ends: 273 [2018-07-23 23:44:00,794 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4011, Invalid=4361, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 23:44:00,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-07-23 23:44:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2018-07-23 23:44:00,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2018-07-23 23:44:00,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 272 transitions. [2018-07-23 23:44:00,798 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 272 transitions. Word has length 268 [2018-07-23 23:44:00,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:44:00,798 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 272 transitions. [2018-07-23 23:44:00,798 INFO L472 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-07-23 23:44:00,798 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 272 transitions. [2018-07-23 23:44:00,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-07-23 23:44:00,799 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:44:00,799 INFO L353 BasicCegarLoop]: trace histogram [89, 88, 88, 1, 1, 1, 1, 1, 1] [2018-07-23 23:44:00,799 INFO L414 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:44:00,799 INFO L82 PathProgramCache]: Analyzing trace with hash 308565552, now seen corresponding path program 88 times [2018-07-23 23:44:00,800 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:44:00,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:44:00,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:00,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:44:00,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:44:04,188 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 23:44:04,188 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:44:04,188 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 23:44:04,204 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:44:04,341 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:44:04,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:44:04,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:44:04,435 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 23:44:04,456 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:44:04,457 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-07-23 23:44:04,457 INFO L450 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-07-23 23:44:04,458 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-07-23 23:44:04,458 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 23:44:04,458 INFO L87 Difference]: Start difference. First operand 272 states and 272 transitions. Second operand 92 states. [2018-07-23 23:44:04,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:44:04,761 INFO L93 Difference]: Finished difference Result 280 states and 280 transitions. [2018-07-23 23:44:04,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-23 23:44:04,761 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 271 [2018-07-23 23:44:04,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:44:04,763 INFO L225 Difference]: With dead ends: 280 [2018-07-23 23:44:04,763 INFO L226 Difference]: Without dead ends: 276 [2018-07-23 23:44:04,764 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4101, Invalid=4455, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 23:44:04,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-07-23 23:44:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2018-07-23 23:44:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-07-23 23:44:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-07-23 23:44:04,767 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 271 [2018-07-23 23:44:04,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:44:04,767 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-07-23 23:44:04,768 INFO L472 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-07-23 23:44:04,768 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-07-23 23:44:04,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-07-23 23:44:04,768 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:44:04,769 INFO L353 BasicCegarLoop]: trace histogram [90, 89, 89, 1, 1, 1, 1, 1, 1] [2018-07-23 23:44:04,769 INFO L414 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:44:04,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1405209429, now seen corresponding path program 89 times [2018-07-23 23:44:04,769 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:44:04,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:44:04,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:04,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:44:04,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:44:08,035 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 23:44:08,035 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:44:08,035 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 23:44:08,043 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:44:08,427 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-07-23 23:44:08,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:44:08,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:44:08,493 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 23:44:08,514 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:44:08,514 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-07-23 23:44:08,514 INFO L450 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-07-23 23:44:08,515 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-07-23 23:44:08,515 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 23:44:08,515 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 93 states. [2018-07-23 23:44:08,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:44:08,920 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2018-07-23 23:44:08,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-07-23 23:44:08,920 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 274 [2018-07-23 23:44:08,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:44:08,921 INFO L225 Difference]: With dead ends: 283 [2018-07-23 23:44:08,921 INFO L226 Difference]: Without dead ends: 279 [2018-07-23 23:44:08,922 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4192, Invalid=4550, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 23:44:08,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-07-23 23:44:08,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 278. [2018-07-23 23:44:08,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2018-07-23 23:44:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 278 transitions. [2018-07-23 23:44:08,925 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 278 transitions. Word has length 274 [2018-07-23 23:44:08,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:44:08,925 INFO L471 AbstractCegarLoop]: Abstraction has 278 states and 278 transitions. [2018-07-23 23:44:08,925 INFO L472 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-07-23 23:44:08,925 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 278 transitions. [2018-07-23 23:44:08,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-07-23 23:44:08,926 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:44:08,926 INFO L353 BasicCegarLoop]: trace histogram [91, 90, 90, 1, 1, 1, 1, 1, 1] [2018-07-23 23:44:08,926 INFO L414 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:44:08,927 INFO L82 PathProgramCache]: Analyzing trace with hash 2095546448, now seen corresponding path program 90 times [2018-07-23 23:44:08,927 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:44:08,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:44:08,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:08,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:44:08,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:44:12,964 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 23:44:12,965 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:44:12,965 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:44:12,974 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:44:13,229 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-07-23 23:44:13,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:44:13,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:44:13,295 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 23:44:13,317 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:44:13,317 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-07-23 23:44:13,317 INFO L450 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-07-23 23:44:13,318 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-07-23 23:44:13,318 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 23:44:13,318 INFO L87 Difference]: Start difference. First operand 278 states and 278 transitions. Second operand 94 states. [2018-07-23 23:44:13,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:44:13,732 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2018-07-23 23:44:13,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-23 23:44:13,733 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 277 [2018-07-23 23:44:13,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:44:13,734 INFO L225 Difference]: With dead ends: 286 [2018-07-23 23:44:13,734 INFO L226 Difference]: Without dead ends: 282 [2018-07-23 23:44:13,734 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4284, Invalid=4646, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 23:44:13,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-07-23 23:44:13,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2018-07-23 23:44:13,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-07-23 23:44:13,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2018-07-23 23:44:13,738 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 277 [2018-07-23 23:44:13,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:44:13,739 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2018-07-23 23:44:13,739 INFO L472 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-07-23 23:44:13,739 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2018-07-23 23:44:13,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-07-23 23:44:13,740 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:44:13,740 INFO L353 BasicCegarLoop]: trace histogram [92, 91, 91, 1, 1, 1, 1, 1, 1] [2018-07-23 23:44:13,740 INFO L414 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:44:13,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1576970613, now seen corresponding path program 91 times [2018-07-23 23:44:13,740 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:44:13,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:44:13,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:13,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:44:13,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:44:17,217 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 23:44:17,217 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:44:17,217 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 23:44:17,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:44:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:44:17,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:44:17,440 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 23:44:17,461 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:44:17,461 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-07-23 23:44:17,462 INFO L450 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-07-23 23:44:17,463 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-07-23 23:44:17,463 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 23:44:17,463 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand 95 states. [2018-07-23 23:44:17,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:44:17,894 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-07-23 23:44:17,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-07-23 23:44:17,895 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 280 [2018-07-23 23:44:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:44:17,896 INFO L225 Difference]: With dead ends: 289 [2018-07-23 23:44:17,896 INFO L226 Difference]: Without dead ends: 285 [2018-07-23 23:44:17,896 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4377, Invalid=4743, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 23:44:17,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-07-23 23:44:17,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2018-07-23 23:44:17,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-07-23 23:44:17,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 284 transitions. [2018-07-23 23:44:17,899 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 284 transitions. Word has length 280 [2018-07-23 23:44:17,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:44:17,900 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 284 transitions. [2018-07-23 23:44:17,900 INFO L472 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-07-23 23:44:17,900 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 284 transitions. [2018-07-23 23:44:17,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-07-23 23:44:17,901 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:44:17,901 INFO L353 BasicCegarLoop]: trace histogram [93, 92, 92, 1, 1, 1, 1, 1, 1] [2018-07-23 23:44:17,901 INFO L414 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:44:17,901 INFO L82 PathProgramCache]: Analyzing trace with hash 464163440, now seen corresponding path program 92 times [2018-07-23 23:44:17,901 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:44:17,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:44:17,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:17,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:44:17,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:44:21,148 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 23:44:21,149 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:44:21,149 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 23:44:21,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:44:21,309 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:44:21,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:44:21,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:44:21,370 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 23:44:21,391 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:44:21,391 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-07-23 23:44:21,392 INFO L450 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-07-23 23:44:21,392 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-07-23 23:44:21,393 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 23:44:21,393 INFO L87 Difference]: Start difference. First operand 284 states and 284 transitions. Second operand 96 states. [2018-07-23 23:44:21,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:44:21,734 INFO L93 Difference]: Finished difference Result 292 states and 292 transitions. [2018-07-23 23:44:21,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-23 23:44:21,734 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 283 [2018-07-23 23:44:21,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:44:21,736 INFO L225 Difference]: With dead ends: 292 [2018-07-23 23:44:21,736 INFO L226 Difference]: Without dead ends: 288 [2018-07-23 23:44:21,737 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4471, Invalid=4841, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 23:44:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-07-23 23:44:21,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2018-07-23 23:44:21,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-07-23 23:44:21,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2018-07-23 23:44:21,742 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 283 [2018-07-23 23:44:21,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:44:21,742 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2018-07-23 23:44:21,742 INFO L472 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-07-23 23:44:21,743 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2018-07-23 23:44:21,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-07-23 23:44:21,744 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:44:21,744 INFO L353 BasicCegarLoop]: trace histogram [94, 93, 93, 1, 1, 1, 1, 1, 1] [2018-07-23 23:44:21,744 INFO L414 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:44:21,745 INFO L82 PathProgramCache]: Analyzing trace with hash -258240405, now seen corresponding path program 93 times [2018-07-23 23:44:21,745 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:44:21,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:44:21,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:21,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:44:21,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:44:25,272 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 23:44:25,272 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:44:25,272 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) [2018-07-23 23:44:25,282 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:44:25,604 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-07-23 23:44:25,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:44:25,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:44:25,674 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 23:44:25,695 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:44:25,696 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-07-23 23:44:25,696 INFO L450 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-07-23 23:44:25,696 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-07-23 23:44:25,697 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 23:44:25,697 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 97 states. [2018-07-23 23:44:26,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:44:26,054 INFO L93 Difference]: Finished difference Result 295 states and 295 transitions. [2018-07-23 23:44:26,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-07-23 23:44:26,054 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 286 [2018-07-23 23:44:26,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:44:26,055 INFO L225 Difference]: With dead ends: 295 [2018-07-23 23:44:26,055 INFO L226 Difference]: Without dead ends: 291 [2018-07-23 23:44:26,056 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4566, Invalid=4940, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 23:44:26,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-07-23 23:44:26,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2018-07-23 23:44:26,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-07-23 23:44:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 290 transitions. [2018-07-23 23:44:26,059 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 290 transitions. Word has length 286 [2018-07-23 23:44:26,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:44:26,059 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 290 transitions. [2018-07-23 23:44:26,059 INFO L472 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-07-23 23:44:26,059 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 290 transitions. [2018-07-23 23:44:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-07-23 23:44:26,060 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:44:26,060 INFO L353 BasicCegarLoop]: trace histogram [95, 94, 94, 1, 1, 1, 1, 1, 1] [2018-07-23 23:44:26,060 INFO L414 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:44:26,061 INFO L82 PathProgramCache]: Analyzing trace with hash 689933456, now seen corresponding path program 94 times [2018-07-23 23:44:26,061 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:44:26,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:44:26,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:26,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:44:26,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:44:29,738 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 23:44:29,738 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:44:29,738 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 23:44:29,746 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:44:29,902 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:44:29,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:44:29,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:44:29,973 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 23:44:29,994 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:44:29,994 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-07-23 23:44:29,995 INFO L450 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-07-23 23:44:29,995 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-07-23 23:44:29,996 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 23:44:29,996 INFO L87 Difference]: Start difference. First operand 290 states and 290 transitions. Second operand 98 states. [2018-07-23 23:44:30,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:44:30,375 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2018-07-23 23:44:30,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-23 23:44:30,375 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 289 [2018-07-23 23:44:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:44:30,377 INFO L225 Difference]: With dead ends: 298 [2018-07-23 23:44:30,377 INFO L226 Difference]: Without dead ends: 294 [2018-07-23 23:44:30,378 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4662, Invalid=5040, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 23:44:30,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-07-23 23:44:30,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2018-07-23 23:44:30,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-07-23 23:44:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2018-07-23 23:44:30,381 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 289 [2018-07-23 23:44:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:44:30,382 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2018-07-23 23:44:30,382 INFO L472 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-07-23 23:44:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2018-07-23 23:44:30,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-07-23 23:44:30,383 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:44:30,383 INFO L353 BasicCegarLoop]: trace histogram [96, 95, 95, 1, 1, 1, 1, 1, 1] [2018-07-23 23:44:30,383 INFO L414 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:44:30,383 INFO L82 PathProgramCache]: Analyzing trace with hash -262479285, now seen corresponding path program 95 times [2018-07-23 23:44:30,383 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:44:30,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:44:30,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:30,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:44:30,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:44:34,219 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 23:44:34,220 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:44:34,220 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 23:44:34,229 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:44:34,572 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-07-23 23:44:34,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:44:34,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:44:34,643 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 23:44:34,664 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:44:34,665 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-07-23 23:44:34,665 INFO L450 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-07-23 23:44:34,665 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-07-23 23:44:34,666 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 23:44:34,666 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 99 states. [2018-07-23 23:44:35,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:44:35,136 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2018-07-23 23:44:35,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-07-23 23:44:35,137 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 292 [2018-07-23 23:44:35,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:44:35,138 INFO L225 Difference]: With dead ends: 301 [2018-07-23 23:44:35,138 INFO L226 Difference]: Without dead ends: 297 [2018-07-23 23:44:35,138 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4759, Invalid=5141, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 23:44:35,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-07-23 23:44:35,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2018-07-23 23:44:35,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-07-23 23:44:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 296 transitions. [2018-07-23 23:44:35,141 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 296 transitions. Word has length 292 [2018-07-23 23:44:35,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:44:35,142 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 296 transitions. [2018-07-23 23:44:35,142 INFO L472 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-07-23 23:44:35,142 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 296 transitions. [2018-07-23 23:44:35,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-07-23 23:44:35,143 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:44:35,143 INFO L353 BasicCegarLoop]: trace histogram [97, 96, 96, 1, 1, 1, 1, 1, 1] [2018-07-23 23:44:35,143 INFO L414 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:44:35,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1036489040, now seen corresponding path program 96 times [2018-07-23 23:44:35,143 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:44:35,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:44:35,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:35,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:44:35,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:44:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:44:38,988 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:44:38,988 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:44:38,997 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:44:39,290 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-07-23 23:44:39,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:44:39,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:44:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:44:39,385 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:44:39,386 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-07-23 23:44:39,386 INFO L450 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-07-23 23:44:39,387 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-07-23 23:44:39,387 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 23:44:39,388 INFO L87 Difference]: Start difference. First operand 296 states and 296 transitions. Second operand 100 states. [2018-07-23 23:44:39,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:44:39,754 INFO L93 Difference]: Finished difference Result 304 states and 304 transitions. [2018-07-23 23:44:39,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-23 23:44:39,754 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 295 [2018-07-23 23:44:39,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:44:39,756 INFO L225 Difference]: With dead ends: 304 [2018-07-23 23:44:39,756 INFO L226 Difference]: Without dead ends: 300 [2018-07-23 23:44:39,757 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4857, Invalid=5243, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 23:44:39,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2018-07-23 23:44:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2018-07-23 23:44:39,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-07-23 23:44:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2018-07-23 23:44:39,760 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 295 [2018-07-23 23:44:39,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:44:39,760 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2018-07-23 23:44:39,761 INFO L472 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-07-23 23:44:39,761 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2018-07-23 23:44:39,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-07-23 23:44:39,762 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:44:39,762 INFO L353 BasicCegarLoop]: trace histogram [98, 97, 97, 1, 1, 1, 1, 1, 1] [2018-07-23 23:44:39,762 INFO L414 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:44:39,762 INFO L82 PathProgramCache]: Analyzing trace with hash 118311979, now seen corresponding path program 97 times [2018-07-23 23:44:39,762 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:44:39,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:44:39,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:39,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:44:39,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:44:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:44:43,698 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:44:43,698 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:44:43,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:44:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:44:43,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:44:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:44:43,962 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:44:43,962 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-07-23 23:44:43,963 INFO L450 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-07-23 23:44:43,963 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-07-23 23:44:43,963 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 23:44:43,964 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 101 states. [2018-07-23 23:44:44,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:44:44,292 INFO L93 Difference]: Finished difference Result 307 states and 307 transitions. [2018-07-23 23:44:44,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-07-23 23:44:44,293 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 298 [2018-07-23 23:44:44,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:44:44,294 INFO L225 Difference]: With dead ends: 307 [2018-07-23 23:44:44,294 INFO L226 Difference]: Without dead ends: 303 [2018-07-23 23:44:44,295 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4956, Invalid=5346, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 23:44:44,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-07-23 23:44:44,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 302. [2018-07-23 23:44:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-07-23 23:44:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 302 transitions. [2018-07-23 23:44:44,299 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 302 transitions. Word has length 298 [2018-07-23 23:44:44,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:44:44,299 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 302 transitions. [2018-07-23 23:44:44,299 INFO L472 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-07-23 23:44:44,299 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 302 transitions. [2018-07-23 23:44:44,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-07-23 23:44:44,300 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:44:44,300 INFO L353 BasicCegarLoop]: trace histogram [99, 98, 98, 1, 1, 1, 1, 1, 1] [2018-07-23 23:44:44,300 INFO L414 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:44:44,300 INFO L82 PathProgramCache]: Analyzing trace with hash 107428048, now seen corresponding path program 98 times [2018-07-23 23:44:44,300 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:44:44,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:44:44,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:44,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:44:44,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:44:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:44:48,280 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:44:48,280 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:44:48,286 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:44:48,442 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:44:48,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:44:48,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:44:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:44:48,554 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:44:48,554 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-07-23 23:44:48,555 INFO L450 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-07-23 23:44:48,555 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-07-23 23:44:48,556 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 23:44:48,556 INFO L87 Difference]: Start difference. First operand 302 states and 302 transitions. Second operand 102 states. [2018-07-23 23:44:48,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:44:48,925 INFO L93 Difference]: Finished difference Result 310 states and 310 transitions. [2018-07-23 23:44:48,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-23 23:44:48,925 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 301 [2018-07-23 23:44:48,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:44:48,926 INFO L225 Difference]: With dead ends: 310 [2018-07-23 23:44:48,926 INFO L226 Difference]: Without dead ends: 306 [2018-07-23 23:44:48,927 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5056, Invalid=5450, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 23:44:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2018-07-23 23:44:48,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2018-07-23 23:44:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-07-23 23:44:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 305 transitions. [2018-07-23 23:44:48,930 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 305 transitions. Word has length 301 [2018-07-23 23:44:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:44:48,930 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 305 transitions. [2018-07-23 23:44:48,931 INFO L472 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-07-23 23:44:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 305 transitions. [2018-07-23 23:44:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-07-23 23:44:48,932 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:44:48,932 INFO L353 BasicCegarLoop]: trace histogram [100, 99, 99, 1, 1, 1, 1, 1, 1] [2018-07-23 23:44:48,932 INFO L414 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:44:48,932 INFO L82 PathProgramCache]: Analyzing trace with hash -2013213173, now seen corresponding path program 99 times [2018-07-23 23:44:48,933 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:44:48,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:44:48,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:48,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:44:48,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:44:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:44:53,149 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:44:53,149 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:44:53,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:44:53,499 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-07-23 23:44:53,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:44:53,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:44:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:44:53,597 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:44:53,597 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-07-23 23:44:53,597 INFO L450 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-07-23 23:44:53,598 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-07-23 23:44:53,599 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 23:44:53,599 INFO L87 Difference]: Start difference. First operand 305 states and 305 transitions. Second operand 103 states. [2018-07-23 23:44:54,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:44:54,143 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-07-23 23:44:54,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-07-23 23:44:54,144 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 304 [2018-07-23 23:44:54,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:44:54,146 INFO L225 Difference]: With dead ends: 313 [2018-07-23 23:44:54,146 INFO L226 Difference]: Without dead ends: 309 [2018-07-23 23:44:54,147 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5157, Invalid=5555, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 23:44:54,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-07-23 23:44:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2018-07-23 23:44:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-07-23 23:44:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 308 transitions. [2018-07-23 23:44:54,152 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 308 transitions. Word has length 304 [2018-07-23 23:44:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:44:54,152 INFO L471 AbstractCegarLoop]: Abstraction has 308 states and 308 transitions. [2018-07-23 23:44:54,152 INFO L472 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-07-23 23:44:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 308 transitions. [2018-07-23 23:44:54,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-07-23 23:44:54,154 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:44:54,154 INFO L353 BasicCegarLoop]: trace histogram [101, 100, 100, 1, 1, 1, 1, 1, 1] [2018-07-23 23:44:54,154 INFO L414 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:44:54,154 INFO L82 PathProgramCache]: Analyzing trace with hash 933096176, now seen corresponding path program 100 times [2018-07-23 23:44:54,154 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:44:54,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:44:54,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:54,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:44:54,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:44:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 15050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:44:58,343 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:44:58,344 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:44:58,351 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:44:58,514 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:44:58,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:44:58,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:44:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 15050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:44:58,615 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:44:58,615 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-07-23 23:44:58,615 INFO L450 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-07-23 23:44:58,616 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-07-23 23:44:58,617 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 23:44:58,617 INFO L87 Difference]: Start difference. First operand 308 states and 308 transitions. Second operand 104 states. [2018-07-23 23:44:59,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:44:59,046 INFO L93 Difference]: Finished difference Result 316 states and 316 transitions. [2018-07-23 23:44:59,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-07-23 23:44:59,046 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 307 [2018-07-23 23:44:59,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:44:59,048 INFO L225 Difference]: With dead ends: 316 [2018-07-23 23:44:59,048 INFO L226 Difference]: Without dead ends: 312 [2018-07-23 23:44:59,049 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5259, Invalid=5661, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 23:44:59,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-07-23 23:44:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2018-07-23 23:44:59,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-07-23 23:44:59,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2018-07-23 23:44:59,054 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 307 [2018-07-23 23:44:59,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:44:59,054 INFO L471 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2018-07-23 23:44:59,054 INFO L472 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-07-23 23:44:59,054 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2018-07-23 23:44:59,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-07-23 23:44:59,056 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:44:59,056 INFO L353 BasicCegarLoop]: trace histogram [102, 101, 101, 1, 1, 1, 1, 1, 1] [2018-07-23 23:44:59,056 INFO L414 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:44:59,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1811716117, now seen corresponding path program 101 times [2018-07-23 23:44:59,056 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:44:59,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:44:59,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:59,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:44:59,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:44:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:45:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 0 proven. 15352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:45:03,547 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:45:03,547 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:45:03,553 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:45:03,864 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-07-23 23:45:03,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:45:03,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:45:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 0 proven. 15352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:45:04,006 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:45:04,006 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-07-23 23:45:04,006 INFO L450 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-07-23 23:45:04,007 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-07-23 23:45:04,008 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 23:45:04,008 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand 105 states. [2018-07-23 23:45:04,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:45:04,695 INFO L93 Difference]: Finished difference Result 319 states and 319 transitions. [2018-07-23 23:45:04,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-07-23 23:45:04,695 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 310 [2018-07-23 23:45:04,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:45:04,696 INFO L225 Difference]: With dead ends: 319 [2018-07-23 23:45:04,696 INFO L226 Difference]: Without dead ends: 315 [2018-07-23 23:45:04,696 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5362, Invalid=5768, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 23:45:04,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-07-23 23:45:04,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2018-07-23 23:45:04,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-07-23 23:45:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 314 transitions. [2018-07-23 23:45:04,701 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 314 transitions. Word has length 310 [2018-07-23 23:45:04,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:45:04,701 INFO L471 AbstractCegarLoop]: Abstraction has 314 states and 314 transitions. [2018-07-23 23:45:04,701 INFO L472 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-07-23 23:45:04,701 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 314 transitions. [2018-07-23 23:45:04,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-07-23 23:45:04,703 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:45:04,703 INFO L353 BasicCegarLoop]: trace histogram [103, 102, 102, 1, 1, 1, 1, 1, 1] [2018-07-23 23:45:04,703 INFO L414 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:45:04,703 INFO L82 PathProgramCache]: Analyzing trace with hash -632388336, now seen corresponding path program 102 times [2018-07-23 23:45:04,703 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:45:04,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:45:04,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:45:04,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:45:04,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:45:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:45:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15657 backedges. 0 proven. 15657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:45:09,013 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:45:09,013 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:45:09,021 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:45:09,360 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-07-23 23:45:09,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:45:09,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:45:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 15657 backedges. 0 proven. 15657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:45:09,466 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:45:09,466 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-07-23 23:45:09,466 INFO L450 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-07-23 23:45:09,467 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-07-23 23:45:09,467 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 23:45:09,467 INFO L87 Difference]: Start difference. First operand 314 states and 314 transitions. Second operand 106 states. [2018-07-23 23:45:09,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:45:09,915 INFO L93 Difference]: Finished difference Result 322 states and 322 transitions. [2018-07-23 23:45:09,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-07-23 23:45:09,915 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 313 [2018-07-23 23:45:09,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:45:09,916 INFO L225 Difference]: With dead ends: 322 [2018-07-23 23:45:09,916 INFO L226 Difference]: Without dead ends: 318 [2018-07-23 23:45:09,917 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5466, Invalid=5876, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 23:45:09,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-07-23 23:45:09,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 317. [2018-07-23 23:45:09,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-07-23 23:45:09,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2018-07-23 23:45:09,922 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 313 [2018-07-23 23:45:09,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:45:09,923 INFO L471 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2018-07-23 23:45:09,923 INFO L472 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-07-23 23:45:09,923 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2018-07-23 23:45:09,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-07-23 23:45:09,924 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:45:09,925 INFO L353 BasicCegarLoop]: trace histogram [104, 103, 103, 1, 1, 1, 1, 1, 1] [2018-07-23 23:45:09,925 INFO L414 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:45:09,925 INFO L82 PathProgramCache]: Analyzing trace with hash -110945845, now seen corresponding path program 103 times [2018-07-23 23:45:09,925 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:45:09,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:45:09,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:45:09,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:45:09,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:45:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:45:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 15965 backedges. 0 proven. 15965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:45:14,312 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:45:14,312 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:45:14,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:45:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:45:14,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:45:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 15965 backedges. 0 proven. 15965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:45:14,630 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:45:14,630 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-07-23 23:45:14,630 INFO L450 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-07-23 23:45:14,631 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-07-23 23:45:14,632 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 23:45:14,632 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand 107 states. [2018-07-23 23:45:15,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:45:15,140 INFO L93 Difference]: Finished difference Result 325 states and 325 transitions. [2018-07-23 23:45:15,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-07-23 23:45:15,140 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 316 [2018-07-23 23:45:15,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:45:15,141 INFO L225 Difference]: With dead ends: 325 [2018-07-23 23:45:15,142 INFO L226 Difference]: Without dead ends: 321 [2018-07-23 23:45:15,142 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5571, Invalid=5985, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 23:45:15,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2018-07-23 23:45:15,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 320. [2018-07-23 23:45:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2018-07-23 23:45:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 320 transitions. [2018-07-23 23:45:15,147 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 320 transitions. Word has length 316 [2018-07-23 23:45:15,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:45:15,147 INFO L471 AbstractCegarLoop]: Abstraction has 320 states and 320 transitions. [2018-07-23 23:45:15,147 INFO L472 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-07-23 23:45:15,147 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 320 transitions. [2018-07-23 23:45:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-07-23 23:45:15,148 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:45:15,149 INFO L353 BasicCegarLoop]: trace histogram [105, 104, 104, 1, 1, 1, 1, 1, 1] [2018-07-23 23:45:15,149 INFO L414 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:45:15,149 INFO L82 PathProgramCache]: Analyzing trace with hash -714406096, now seen corresponding path program 104 times [2018-07-23 23:45:15,149 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:45:15,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:45:15,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:45:15,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:45:15,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:45:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-07-23 23:45:18,860 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 23:45:18,865 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 23:45:18,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 11:45:18 BoogieIcfgContainer [2018-07-23 23:45:18,866 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 23:45:18,867 INFO L168 Benchmark]: Toolchain (without parser) took 231979.10 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -888.8 MB). Peak memory consumption was 178.6 MB. Max. memory is 7.1 GB. [2018-07-23 23:45:18,868 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 23:45:18,868 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-23 23:45:18,869 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.02 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 23:45:18,869 INFO L168 Benchmark]: Boogie Preprocessor took 29.63 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 23:45:18,869 INFO L168 Benchmark]: RCFGBuilder took 380.92 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 717.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -768.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-07-23 23:45:18,870 INFO L168 Benchmark]: TraceAbstraction took 231233.71 ms. Allocated memory was 2.2 GB in the beginning and 2.6 GB in the end (delta: 350.2 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -130.5 MB). Peak memory consumption was 219.7 MB. Max. memory is 7.1 GB. [2018-07-23 23:45:18,872 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 292.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 38.02 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.63 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 380.92 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 717.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -768.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 231233.71 ms. Allocated memory was 2.2 GB in the beginning and 2.6 GB in the end (delta: 350.2 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -130.5 MB). Peak memory consumption was 219.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 320 with TraceHistMax 105, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. TIMEOUT Result, 231.1s OverallTime, 106 OverallIterations, 105 TraceHistogramMax, 27.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 742 SDtfs, 5562 SDslu, 23554 SDs, 0 SdLazy, 8998 SolverSat, 181 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22560 GetRequests, 16896 SyntacticMatches, 0 SemanticMatches, 5664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 171.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=320occurred in iteration=105, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 105 MinimizatonAttempts, 103 StatesRemovedByMinimization, 103 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.7s SsaConstructionTime, 15.5s SatisfiabilityAnalysisTime, 175.5s InterpolantComputationTime, 33591 NumberOfCodeBlocks, 33591 NumberOfCodeBlocksAsserted, 2928 NumberOfCheckSat, 33383 ConstructedInterpolants, 0 QuantifiedInterpolants, 21002125 SizeOfPredicates, 308 NumberOfNonLiveVariables, 65920 ConjunctsInSsa, 6073 ConjunctsInUnsatCore, 208 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1114048 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_nondet_true-unreach-call_true-termination.i_svcomp-Reach-64bit-Automizer_Default.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-23_23-45-18-881.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_nondet_true-unreach-call_true-termination.i_svcomp-Reach-64bit-Automizer_Default.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_23-45-18-881.csv Completed graceful shutdown