java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/overflow_true-unreach-call1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 22:44:58,160 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:44:58,163 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:44:58,179 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:44:58,179 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:44:58,180 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:44:58,182 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:44:58,185 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:44:58,187 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:44:58,188 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:44:58,188 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:44:58,190 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:44:58,191 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:44:58,200 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:44:58,203 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:44:58,204 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:44:58,205 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:44:58,206 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:44:58,211 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:44:58,216 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:44:58,218 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:44:58,220 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:44:58,222 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-06 22:44:58,224 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-06 22:44:58,224 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-06 22:44:58,225 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-06 22:44:58,226 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-06 22:44:58,226 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-06 22:44:58,227 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-06 22:44:58,230 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-06 22:44:58,230 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-06 22:44:58,231 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-06 22:44:58,235 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 22:44:58,260 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:44:58,260 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:44:58,261 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:44:58,261 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:44:58,266 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:44:58,266 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:44:58,266 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:44:58,266 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:44:58,266 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:44:58,267 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:44:58,267 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:44:58,267 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:44:58,267 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:44:58,267 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:44:58,269 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:44:58,269 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:44:58,269 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:44:58,269 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:44:58,269 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:44:58,269 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:44:58,270 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:44:58,270 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:44:58,270 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:44:58,270 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:44:58,270 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:44:58,272 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:44:58,272 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:44:58,272 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:44:58,316 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:44:58,332 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:44:58,336 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:44:58,337 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:44:58,338 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:44:58,338 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/overflow_true-unreach-call1.i [2018-11-06 22:44:58,399 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/136c95122/1edef81868474a73b0b1524914e3b1e3/FLAGaf56beaf2 [2018-11-06 22:44:58,835 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:44:58,836 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/overflow_true-unreach-call1.i [2018-11-06 22:44:58,841 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/136c95122/1edef81868474a73b0b1524914e3b1e3/FLAGaf56beaf2 [2018-11-06 22:44:58,856 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/136c95122/1edef81868474a73b0b1524914e3b1e3 [2018-11-06 22:44:58,865 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:44:58,866 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:44:58,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:44:58,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:44:58,871 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:44:58,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:58" (1/1) ... [2018-11-06 22:44:58,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e76d110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:58, skipping insertion in model container [2018-11-06 22:44:58,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:58" (1/1) ... [2018-11-06 22:44:58,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:44:58,906 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:44:59,124 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:44:59,129 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:44:59,147 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:44:59,164 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:44:59,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59 WrapperNode [2018-11-06 22:44:59,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:44:59,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:44:59,169 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:44:59,169 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:44:59,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (1/1) ... [2018-11-06 22:44:59,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (1/1) ... [2018-11-06 22:44:59,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:44:59,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:44:59,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:44:59,207 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:44:59,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (1/1) ... [2018-11-06 22:44:59,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (1/1) ... [2018-11-06 22:44:59,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (1/1) ... [2018-11-06 22:44:59,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (1/1) ... [2018-11-06 22:44:59,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (1/1) ... [2018-11-06 22:44:59,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (1/1) ... [2018-11-06 22:44:59,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (1/1) ... [2018-11-06 22:44:59,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:44:59,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:44:59,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:44:59,236 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:44:59,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:44:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:44:59,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:44:59,537 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:44:59,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:59 BoogieIcfgContainer [2018-11-06 22:44:59,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:44:59,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:44:59,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:44:59,542 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:44:59,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:44:58" (1/3) ... [2018-11-06 22:44:59,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a27e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:59, skipping insertion in model container [2018-11-06 22:44:59,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:59" (2/3) ... [2018-11-06 22:44:59,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a27e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:59, skipping insertion in model container [2018-11-06 22:44:59,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:59" (3/3) ... [2018-11-06 22:44:59,546 INFO L112 eAbstractionObserver]: Analyzing ICFG overflow_true-unreach-call1.i [2018-11-06 22:44:59,555 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:44:59,562 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:44:59,579 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:44:59,611 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:44:59,612 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:44:59,612 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:44:59,612 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:44:59,613 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:44:59,613 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:44:59,613 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:44:59,613 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:44:59,613 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:44:59,628 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-11-06 22:44:59,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-11-06 22:44:59,634 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:59,635 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-11-06 22:44:59,637 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:59,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:59,643 INFO L82 PathProgramCache]: Analyzing trace with hash 889783783, now seen corresponding path program 1 times [2018-11-06 22:44:59,645 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:59,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:59,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:59,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:59,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:59,760 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:44:59,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 22:44:59,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-06 22:44:59,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-06 22:44:59,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:44:59,779 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2018-11-06 22:44:59,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:59,793 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-11-06 22:44:59,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 22:44:59,795 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-11-06 22:44:59,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:59,804 INFO L225 Difference]: With dead ends: 20 [2018-11-06 22:44:59,804 INFO L226 Difference]: Without dead ends: 8 [2018-11-06 22:44:59,808 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:44:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-11-06 22:44:59,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-11-06 22:44:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-11-06 22:44:59,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-11-06 22:44:59,837 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-11-06 22:44:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:59,837 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-11-06 22:44:59,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-06 22:44:59,837 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-11-06 22:44:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-11-06 22:44:59,838 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:59,838 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:59,839 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:59,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:59,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1805923659, now seen corresponding path program 1 times [2018-11-06 22:44:59,839 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:59,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:59,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:59,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:44:59,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:59,998 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:44:59,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:45:00,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:45:00,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:45:00,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:45:00,006 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 3 states. [2018-11-06 22:45:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:00,073 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-11-06 22:45:00,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:45:00,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-11-06 22:45:00,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:00,075 INFO L225 Difference]: With dead ends: 14 [2018-11-06 22:45:00,075 INFO L226 Difference]: Without dead ends: 10 [2018-11-06 22:45:00,077 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:45:00,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-11-06 22:45:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-11-06 22:45:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-11-06 22:45:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-11-06 22:45:00,081 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-11-06 22:45:00,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:00,081 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-11-06 22:45:00,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:45:00,083 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-11-06 22:45:00,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-06 22:45:00,083 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:00,083 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:00,084 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:00,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:00,084 INFO L82 PathProgramCache]: Analyzing trace with hash 373599493, now seen corresponding path program 1 times [2018-11-06 22:45:00,084 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:00,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:00,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:00,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:45:00,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:00,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:00,221 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:00,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:45:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:00,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:00,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:00,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-11-06 22:45:00,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 22:45:00,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 22:45:00,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:45:00,313 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 4 states. [2018-11-06 22:45:00,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:00,380 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-11-06 22:45:00,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 22:45:00,381 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-11-06 22:45:00,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:00,382 INFO L225 Difference]: With dead ends: 16 [2018-11-06 22:45:00,382 INFO L226 Difference]: Without dead ends: 12 [2018-11-06 22:45:00,382 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:45:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-06 22:45:00,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-06 22:45:00,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-06 22:45:00,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-06 22:45:00,385 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-11-06 22:45:00,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:00,386 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-06 22:45:00,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 22:45:00,386 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-06 22:45:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-06 22:45:00,387 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:00,387 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:00,388 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:00,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:00,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1700389313, now seen corresponding path program 2 times [2018-11-06 22:45:00,390 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:00,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:00,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:00,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:45:00,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:00,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:00,535 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:00,547 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:45:00,565 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:45:00,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:00,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:00,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:00,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-06 22:45:00,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:45:00,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:45:00,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:45:00,614 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2018-11-06 22:45:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:00,757 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-11-06 22:45:00,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 22:45:00,758 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-06 22:45:00,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:00,759 INFO L225 Difference]: With dead ends: 18 [2018-11-06 22:45:00,759 INFO L226 Difference]: Without dead ends: 14 [2018-11-06 22:45:00,759 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:45:00,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-06 22:45:00,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-06 22:45:00,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-06 22:45:00,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-06 22:45:00,763 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-11-06 22:45:00,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:00,763 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-06 22:45:00,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:45:00,764 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-06 22:45:00,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-06 22:45:00,764 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:00,764 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:00,764 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:00,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:00,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1938806535, now seen corresponding path program 3 times [2018-11-06 22:45:00,765 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:00,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:00,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:00,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:00,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:01,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:01,049 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:01,058 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:45:13,087 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-06 22:45:13,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:13,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:13,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:13,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-06 22:45:13,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 22:45:13,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 22:45:13,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:45:13,124 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-11-06 22:45:13,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:13,173 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-11-06 22:45:13,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 22:45:13,177 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-11-06 22:45:13,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:13,178 INFO L225 Difference]: With dead ends: 20 [2018-11-06 22:45:13,178 INFO L226 Difference]: Without dead ends: 16 [2018-11-06 22:45:13,178 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:45:13,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-06 22:45:13,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-06 22:45:13,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-06 22:45:13,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-11-06 22:45:13,182 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-11-06 22:45:13,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:13,182 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-11-06 22:45:13,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 22:45:13,183 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-11-06 22:45:13,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-06 22:45:13,183 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:13,184 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:13,184 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:13,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:13,184 INFO L82 PathProgramCache]: Analyzing trace with hash 870477107, now seen corresponding path program 4 times [2018-11-06 22:45:13,184 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:13,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:13,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:13,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:13,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:13,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:13,345 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:13,354 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:45:13,362 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:45:13,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:13,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:13,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:13,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-06 22:45:13,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:45:13,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:45:13,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:45:13,444 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2018-11-06 22:45:13,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:13,527 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-06 22:45:13,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:45:13,527 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-11-06 22:45:13,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:13,528 INFO L225 Difference]: With dead ends: 22 [2018-11-06 22:45:13,528 INFO L226 Difference]: Without dead ends: 18 [2018-11-06 22:45:13,529 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:45:13,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-06 22:45:13,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-06 22:45:13,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-06 22:45:13,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-06 22:45:13,533 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-11-06 22:45:13,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:13,534 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-06 22:45:13,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:45:13,534 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-06 22:45:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-06 22:45:13,535 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:13,535 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:13,536 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:13,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:13,536 INFO L82 PathProgramCache]: Analyzing trace with hash -942372115, now seen corresponding path program 5 times [2018-11-06 22:45:13,536 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:13,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:13,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:13,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:13,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:13,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:13,793 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:13,806 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:45:13,879 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-06 22:45:13,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:13,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:13,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:13,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-06 22:45:13,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 22:45:13,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 22:45:13,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:45:13,918 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2018-11-06 22:45:14,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:14,233 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-11-06 22:45:14,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-06 22:45:14,234 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-11-06 22:45:14,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:14,235 INFO L225 Difference]: With dead ends: 24 [2018-11-06 22:45:14,235 INFO L226 Difference]: Without dead ends: 20 [2018-11-06 22:45:14,236 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:45:14,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-06 22:45:14,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-11-06 22:45:14,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-06 22:45:14,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-11-06 22:45:14,240 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-11-06 22:45:14,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:14,240 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-11-06 22:45:14,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 22:45:14,240 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-11-06 22:45:14,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-06 22:45:14,241 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:14,241 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:14,241 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:14,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:14,242 INFO L82 PathProgramCache]: Analyzing trace with hash 666247719, now seen corresponding path program 6 times [2018-11-06 22:45:14,242 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:14,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:14,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:14,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:14,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:14,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:14,495 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:14,504 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:45:14,529 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-06 22:45:14,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:14,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:14,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:14,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-06 22:45:14,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 22:45:14,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 22:45:14,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:45:14,579 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2018-11-06 22:45:14,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:14,684 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-11-06 22:45:14,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-06 22:45:14,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-11-06 22:45:14,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:14,687 INFO L225 Difference]: With dead ends: 26 [2018-11-06 22:45:14,688 INFO L226 Difference]: Without dead ends: 22 [2018-11-06 22:45:14,688 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:45:14,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-06 22:45:14,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-06 22:45:14,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-06 22:45:14,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-11-06 22:45:14,693 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-11-06 22:45:14,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:14,693 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-11-06 22:45:14,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 22:45:14,693 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-11-06 22:45:14,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-06 22:45:14,694 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:14,694 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:14,695 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:14,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:14,695 INFO L82 PathProgramCache]: Analyzing trace with hash 361681633, now seen corresponding path program 7 times [2018-11-06 22:45:14,695 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:14,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:14,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:14,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:14,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:15,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:15,062 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:15,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:45:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:15,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:15,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:15,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-06 22:45:15,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:45:15,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:45:15,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:45:15,165 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 10 states. [2018-11-06 22:45:15,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:15,320 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-11-06 22:45:15,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:45:15,321 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2018-11-06 22:45:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:15,323 INFO L225 Difference]: With dead ends: 28 [2018-11-06 22:45:15,323 INFO L226 Difference]: Without dead ends: 24 [2018-11-06 22:45:15,323 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:45:15,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-06 22:45:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-06 22:45:15,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-06 22:45:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-11-06 22:45:15,328 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-11-06 22:45:15,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:15,328 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-11-06 22:45:15,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:45:15,328 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-11-06 22:45:15,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-06 22:45:15,329 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:15,330 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:15,330 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:15,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:15,330 INFO L82 PathProgramCache]: Analyzing trace with hash -268550885, now seen corresponding path program 8 times [2018-11-06 22:45:15,331 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:15,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:15,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:15,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:45:15,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:15,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:15,554 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:15,567 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:45:15,595 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:45:15,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:15,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:15,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:15,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-06 22:45:15,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-06 22:45:15,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-06 22:45:15,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:45:15,630 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 11 states. [2018-11-06 22:45:15,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:15,734 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-11-06 22:45:15,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 22:45:15,735 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2018-11-06 22:45:15,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:15,736 INFO L225 Difference]: With dead ends: 30 [2018-11-06 22:45:15,736 INFO L226 Difference]: Without dead ends: 26 [2018-11-06 22:45:15,737 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:45:15,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-06 22:45:15,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-11-06 22:45:15,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-06 22:45:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-11-06 22:45:15,742 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-11-06 22:45:15,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:15,742 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-11-06 22:45:15,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-06 22:45:15,742 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-11-06 22:45:15,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-06 22:45:15,743 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:15,743 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:15,744 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:15,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:15,744 INFO L82 PathProgramCache]: Analyzing trace with hash -331611947, now seen corresponding path program 9 times [2018-11-06 22:45:15,744 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:15,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:15,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:15,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:15,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:15,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:15,934 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:15,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:45:28,024 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-06 22:45:28,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:28,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:28,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:28,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-06 22:45:28,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 22:45:28,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 22:45:28,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:45:28,075 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 12 states. [2018-11-06 22:45:28,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:28,200 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-11-06 22:45:28,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 22:45:28,200 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2018-11-06 22:45:28,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:28,202 INFO L225 Difference]: With dead ends: 32 [2018-11-06 22:45:28,202 INFO L226 Difference]: Without dead ends: 28 [2018-11-06 22:45:28,203 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:45:28,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-06 22:45:28,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-06 22:45:28,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-06 22:45:28,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-11-06 22:45:28,207 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-11-06 22:45:28,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:28,208 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-11-06 22:45:28,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 22:45:28,208 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-11-06 22:45:28,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-06 22:45:28,209 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:28,209 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:28,209 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:28,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:28,210 INFO L82 PathProgramCache]: Analyzing trace with hash -803750385, now seen corresponding path program 10 times [2018-11-06 22:45:28,210 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:28,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:28,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:28,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:28,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:28,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:28,838 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:28,853 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:45:28,879 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:45:28,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:28,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:28,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:28,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-06 22:45:28,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:45:28,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:45:28,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:45:28,951 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 13 states. [2018-11-06 22:45:29,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:29,187 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-11-06 22:45:29,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 22:45:29,188 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2018-11-06 22:45:29,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:29,189 INFO L225 Difference]: With dead ends: 34 [2018-11-06 22:45:29,189 INFO L226 Difference]: Without dead ends: 30 [2018-11-06 22:45:29,190 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:45:29,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-06 22:45:29,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-06 22:45:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-06 22:45:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-11-06 22:45:29,194 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-11-06 22:45:29,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:29,195 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-11-06 22:45:29,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:45:29,195 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-11-06 22:45:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-06 22:45:29,196 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:29,196 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:29,196 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:29,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:29,197 INFO L82 PathProgramCache]: Analyzing trace with hash 737744073, now seen corresponding path program 11 times [2018-11-06 22:45:29,197 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:29,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:29,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:29,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:29,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:45:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:29,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:45:29,542 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:45:29,552 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:46:07,249 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-06 22:46:07,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:46:07,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:07,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:07,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-06 22:46:07,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-06 22:46:07,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-06 22:46:07,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:46:07,503 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 14 states. [2018-11-06 22:46:07,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:07,667 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-11-06 22:46:07,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-06 22:46:07,667 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2018-11-06 22:46:07,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:07,668 INFO L225 Difference]: With dead ends: 36 [2018-11-06 22:46:07,669 INFO L226 Difference]: Without dead ends: 32 [2018-11-06 22:46:07,670 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:46:07,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-06 22:46:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-11-06 22:46:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-06 22:46:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-11-06 22:46:07,675 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-11-06 22:46:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:07,675 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-11-06 22:46:07,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-06 22:46:07,676 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-11-06 22:46:07,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-06 22:46:07,676 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:07,677 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:07,677 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:07,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:07,677 INFO L82 PathProgramCache]: Analyzing trace with hash 350201091, now seen corresponding path program 12 times [2018-11-06 22:46:07,677 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:07,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:07,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:07,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:46:07,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:07,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:08,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:08,059 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:46:08,068 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:46:08,905 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-06 22:46:08,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:46:08,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:08,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:08,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-06 22:46:08,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-06 22:46:08,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-06 22:46:08,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:46:08,947 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 15 states. [2018-11-06 22:46:09,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:09,183 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-11-06 22:46:09,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-06 22:46:09,184 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2018-11-06 22:46:09,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:09,184 INFO L225 Difference]: With dead ends: 38 [2018-11-06 22:46:09,184 INFO L226 Difference]: Without dead ends: 34 [2018-11-06 22:46:09,185 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:46:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-06 22:46:09,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-11-06 22:46:09,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-06 22:46:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-11-06 22:46:09,189 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-11-06 22:46:09,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:09,190 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-11-06 22:46:09,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-06 22:46:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-11-06 22:46:09,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-06 22:46:09,191 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:09,191 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:09,191 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:09,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:09,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1583550141, now seen corresponding path program 13 times [2018-11-06 22:46:09,191 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:09,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:09,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:09,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:46:09,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:09,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:09,669 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:46:09,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:46:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:09,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:09,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:09,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-06 22:46:09,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-06 22:46:09,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-06 22:46:09,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:46:09,728 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 16 states. [2018-11-06 22:46:10,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:10,023 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-11-06 22:46:10,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:46:10,024 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-11-06 22:46:10,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:10,025 INFO L225 Difference]: With dead ends: 40 [2018-11-06 22:46:10,026 INFO L226 Difference]: Without dead ends: 36 [2018-11-06 22:46:10,027 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:46:10,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-06 22:46:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-06 22:46:10,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-06 22:46:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-11-06 22:46:10,031 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-11-06 22:46:10,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:10,032 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-11-06 22:46:10,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-06 22:46:10,032 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-11-06 22:46:10,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-06 22:46:10,033 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:10,033 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:10,033 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:10,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:10,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1421013495, now seen corresponding path program 14 times [2018-11-06 22:46:10,034 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:10,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:10,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:10,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:46:10,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:10,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:10,335 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:46:10,343 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:46:10,374 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:46:10,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:46:10,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:10,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:10,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-06 22:46:10,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-06 22:46:10,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-06 22:46:10,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:46:10,488 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 17 states. [2018-11-06 22:46:10,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:10,828 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-11-06 22:46:10,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-06 22:46:10,829 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2018-11-06 22:46:10,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:10,829 INFO L225 Difference]: With dead ends: 42 [2018-11-06 22:46:10,830 INFO L226 Difference]: Without dead ends: 38 [2018-11-06 22:46:10,830 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:46:10,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-06 22:46:10,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-11-06 22:46:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-06 22:46:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-11-06 22:46:10,835 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-11-06 22:46:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:10,836 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-11-06 22:46:10,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-06 22:46:10,836 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-11-06 22:46:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-06 22:46:10,837 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:10,837 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:10,837 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:10,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:10,838 INFO L82 PathProgramCache]: Analyzing trace with hash -157880655, now seen corresponding path program 15 times [2018-11-06 22:46:10,838 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:10,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:10,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:10,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:46:10,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:11,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:11,502 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:46:11,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:46:52,910 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-06 22:46:52,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:46:52,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:53,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:53,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-06 22:46:53,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-06 22:46:53,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-06 22:46:53,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:46:53,011 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 18 states. [2018-11-06 22:46:53,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:53,382 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-11-06 22:46:53,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-06 22:46:53,383 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2018-11-06 22:46:53,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:53,383 INFO L225 Difference]: With dead ends: 44 [2018-11-06 22:46:53,384 INFO L226 Difference]: Without dead ends: 40 [2018-11-06 22:46:53,385 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:46:53,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-06 22:46:53,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-11-06 22:46:53,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-06 22:46:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-11-06 22:46:53,390 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-11-06 22:46:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:53,390 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-11-06 22:46:53,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-06 22:46:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-11-06 22:46:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-06 22:46:53,391 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:53,391 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:53,391 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:53,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:53,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1351703317, now seen corresponding path program 16 times [2018-11-06 22:46:53,392 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:53,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:53,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:53,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:46:53,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:53,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:53,768 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:46:53,777 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:46:53,801 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:46:53,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:46:53,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:46:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:53,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:46:53,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-06 22:46:53,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-06 22:46:53,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-06 22:46:53,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:46:53,901 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 19 states. [2018-11-06 22:46:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:46:54,202 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-11-06 22:46:54,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-06 22:46:54,202 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2018-11-06 22:46:54,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:46:54,203 INFO L225 Difference]: With dead ends: 46 [2018-11-06 22:46:54,203 INFO L226 Difference]: Without dead ends: 42 [2018-11-06 22:46:54,204 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:46:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-06 22:46:54,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-06 22:46:54,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-06 22:46:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-11-06 22:46:54,209 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-11-06 22:46:54,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:46:54,209 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-11-06 22:46:54,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-06 22:46:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-11-06 22:46:54,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-06 22:46:54,210 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:46:54,210 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1] [2018-11-06 22:46:54,211 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:46:54,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:46:54,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1859013467, now seen corresponding path program 17 times [2018-11-06 22:46:54,211 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:46:54,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:46:54,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:54,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:46:54,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:46:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:46:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:46:54,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:46:54,598 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:46:54,606 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:48:23,582 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-06 22:48:23,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:48:23,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:48:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:48:23,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:48:23,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-06 22:48:23,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-06 22:48:23,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-06 22:48:23,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:48:23,713 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 20 states. [2018-11-06 22:48:24,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:48:24,405 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-11-06 22:48:24,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 22:48:24,406 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2018-11-06 22:48:24,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:48:24,406 INFO L225 Difference]: With dead ends: 48 [2018-11-06 22:48:24,406 INFO L226 Difference]: Without dead ends: 44 [2018-11-06 22:48:24,407 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:48:24,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-06 22:48:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-11-06 22:48:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-06 22:48:24,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-11-06 22:48:24,410 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-11-06 22:48:24,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:48:24,410 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-11-06 22:48:24,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-06 22:48:24,411 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-11-06 22:48:24,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-06 22:48:24,411 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:48:24,411 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1] [2018-11-06 22:48:24,412 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:48:24,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:48:24,412 INFO L82 PathProgramCache]: Analyzing trace with hash 242204127, now seen corresponding path program 18 times [2018-11-06 22:48:24,412 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:48:24,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:48:24,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:48:24,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:48:24,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:48:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:48:24,958 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:48:24,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:48:24,959 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:48:24,968 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:49:08,124 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-06 22:49:08,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:08,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:08,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:08,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-06 22:49:08,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-06 22:49:08,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-06 22:49:08,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:49:08,348 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 21 states. [2018-11-06 22:49:08,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:08,786 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-11-06 22:49:08,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-06 22:49:08,786 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2018-11-06 22:49:08,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:08,787 INFO L225 Difference]: With dead ends: 50 [2018-11-06 22:49:08,787 INFO L226 Difference]: Without dead ends: 46 [2018-11-06 22:49:08,788 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:49:08,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-06 22:49:08,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-11-06 22:49:08,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-06 22:49:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-11-06 22:49:08,793 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-11-06 22:49:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:08,793 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-11-06 22:49:08,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-06 22:49:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-11-06 22:49:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-06 22:49:08,794 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:08,794 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:08,794 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:08,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:08,795 INFO L82 PathProgramCache]: Analyzing trace with hash 877682841, now seen corresponding path program 19 times [2018-11-06 22:49:08,795 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:08,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:08,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:08,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:08,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:09,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:09,234 INFO L225 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 [2018-11-06 22:49:09,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:49:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:09,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:09,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:09,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-06 22:49:09,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:49:09,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:49:09,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:49:09,313 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 22 states. [2018-11-06 22:49:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:09,750 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-11-06 22:49:09,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 22:49:09,750 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2018-11-06 22:49:09,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:09,751 INFO L225 Difference]: With dead ends: 52 [2018-11-06 22:49:09,751 INFO L226 Difference]: Without dead ends: 48 [2018-11-06 22:49:09,752 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:49:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-06 22:49:09,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-06 22:49:09,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-06 22:49:09,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-11-06 22:49:09,760 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-11-06 22:49:09,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:09,760 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-11-06 22:49:09,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:49:09,760 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-11-06 22:49:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-06 22:49:09,761 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:09,761 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:09,761 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:09,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:09,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1687370963, now seen corresponding path program 20 times [2018-11-06 22:49:09,761 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:09,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:09,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:09,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:49:09,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:10,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:10,506 INFO L225 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 [2018-11-06 22:49:10,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:49:10,529 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:49:10,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:10,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:10,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:10,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-06 22:49:10,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-06 22:49:10,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-06 22:49:10,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:49:10,596 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 23 states. [2018-11-06 22:49:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:10,965 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-11-06 22:49:10,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-06 22:49:10,966 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2018-11-06 22:49:10,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:10,968 INFO L225 Difference]: With dead ends: 54 [2018-11-06 22:49:10,968 INFO L226 Difference]: Without dead ends: 50 [2018-11-06 22:49:10,969 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:49:10,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-06 22:49:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-11-06 22:49:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-11-06 22:49:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-11-06 22:49:10,973 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-11-06 22:49:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:10,974 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-11-06 22:49:10,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-06 22:49:10,974 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-11-06 22:49:10,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-06 22:49:10,974 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:10,974 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:10,975 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:10,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:10,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1886391667, now seen corresponding path program 21 times [2018-11-06 22:49:10,975 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:10,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:10,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:10,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:10,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:11,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:11,403 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:49:11,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:49:24,340 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-06 22:49:24,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:24,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:25,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:25,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 25 [2018-11-06 22:49:25,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-06 22:49:25,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-06 22:49:25,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:49:25,057 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 25 states. [2018-11-06 22:49:25,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:25,470 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-11-06 22:49:25,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-06 22:49:25,470 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2018-11-06 22:49:25,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:25,471 INFO L225 Difference]: With dead ends: 56 [2018-11-06 22:49:25,471 INFO L226 Difference]: Without dead ends: 52 [2018-11-06 22:49:25,472 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:49:25,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-06 22:49:25,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-11-06 22:49:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-06 22:49:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-11-06 22:49:25,478 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-11-06 22:49:25,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:25,479 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-11-06 22:49:25,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-06 22:49:25,479 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-11-06 22:49:25,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-06 22:49:25,480 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:25,480 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:25,480 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:25,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:25,480 INFO L82 PathProgramCache]: Analyzing trace with hash -298442297, now seen corresponding path program 22 times [2018-11-06 22:49:25,481 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:25,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:25,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:25,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:25,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:25,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:25,984 INFO L225 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 [2018-11-06 22:49:25,992 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:49:26,008 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:49:26,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:26,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:26,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:26,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-06 22:49:26,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-06 22:49:26,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-06 22:49:26,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:49:26,082 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 25 states. [2018-11-06 22:49:26,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:26,535 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-11-06 22:49:26,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-06 22:49:26,536 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2018-11-06 22:49:26,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:26,536 INFO L225 Difference]: With dead ends: 58 [2018-11-06 22:49:26,537 INFO L226 Difference]: Without dead ends: 54 [2018-11-06 22:49:26,537 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:49:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-06 22:49:26,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-06 22:49:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-06 22:49:26,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-11-06 22:49:26,542 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-11-06 22:49:26,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:26,542 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-11-06 22:49:26,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-06 22:49:26,542 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-11-06 22:49:26,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-06 22:49:26,543 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:26,543 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:26,543 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:26,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:26,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1007512193, now seen corresponding path program 23 times [2018-11-06 22:49:26,543 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:26,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:26,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:26,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:26,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:27,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:27,886 INFO L225 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 [2018-11-06 22:49:27,895 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown